Physics Final
The + + P arrangement exerts the strongest net magnitude of electric force on a positive charge placed at P.
1) + - P 2) + + P
The - - P arrangement exerts the strongest net magnitude of electric force on a positive charge placed at P.
1) + - P 2) - - P
The - + P arrangement exerts the strongest net magnitude of electric force on a positive charge placed at P.
1) + P + 2) - + P
The two arrangements both exert the same nonzero net electric force on the positive charge placed at P.
1) - - P 2) + + P
The - - P arrangement exerts the strongest net magnitude of electric force on a positive charge placed at P.
1) - - P 2) + P +
The - P + arrangement exerts the strongest net magnitude of electric force on a positive charge placed at P.
1) - P + 2) - - P
The + + P arrangement exerts the strongest net magnitude of electric force on a positive charge placed at P.
1) - P - 2) + + P
The two arrangements both exert zero net electric force on the positive charge placed at P.
1) - P - 2) + P +
9/45 x 100 = 20
A charge +Q generates a potential of 100 V at a point 9 m away from the charge, with respect to a zero potential reference at infinity. What is the potential at another point 45 m away from the charge?
0.07 x 300^2 = 6300 7 x 0.02 x 300 = 42 6300/42 = 150
A charged particle (Q = 7 C, m = 0.07 kg) moves at a speed of 300 m/s perpendicular to the direction of a uniform magnetic field of 0.02 T. What is the radius of the circular orbit of the particle? (in units of m)
m = -di/do 7= -di/26 di=182 f = dido/ di+do (182 x 26)/ (182 + 26) =22.75
A concave mirror produces a real image that is 7 times as tall as the object. If the object is 26 cm in front of the mirror, then what is the focal length of the mirror?
m= -di/do 5 = -di/44 di= -220 f= dido/di+do =(-220)(44)/(-220+ 44) =55
A concave mirror produces a virtual image that is 5 times as tall as the object. If the object is 44 cm in front of the mirror, what is the focal length of this mirror?
3 x .9/.5 = 5.4
A magnetic B field of strength 0.9 T is perpendicular to a loop with an area of 3 m2. If the area of the loop is reduced to zero in 0.5 s, then what is the magnitude of the induced emf voltage? (in V) 5.4 10.8 0 54 27
Take the two distances and square them, and divide them 3^2 / 12^2 = 0.0625 Then multiply by the force 0.0625 x 20 =1.25N
A pair of electrically charged objects attract each other with a force of 20 N when they are a distance of 3 m apart. If their charges stay the same, then what will be the attractive force between them when they are 12 m apart?
Multiply the original force by the increased factor force 3 x 2 = 6N
A pair of point charges attract each other through Coulumb's interaction with a force of 3 N when they are placed at a distance of 8 m apart. If the distance remains the same and one of the charges is increased by a factor of 2, then what will be the new attractive force between them?
Multiply the original electric field (4 N/C) by the factor (5) 4x5 = 20 N/C
A point charge gives rise to an electric field of 4 N/C at a distance of 3 m. If the distance remains the same and the charge is increased by a factor of 5, then what will be the new electric field?
Divide the value to the second power of both the lengths 5^2/10^2 = 0.25 Then multiply by the magnitude 0.25 x 3 = 0.75
A point charge gives rise to an electric field with magnitude 3 N/C at a distance of 5 m. If the distance is increased to 10 m, then what will be the new magnitude of the electric field? N/C
Divide the secondary by the primary70/790Then multiply it by the V =5.32
A transformer has 790 primary and 70 secondary turns. An alternating potential of 60 V is applied to the primary. What is the secondary potential? (in V)
The two arrangements both exert the same nonzero net electric force on the positive charge placed at P.
Given above are arrangements of two electric charges of the same charge magnitude and a point labeled P(+ indicates a positive charge and - is a negative charge), as shown in figure (1) and (2), respectively. There is the same distance d between adjacent items on the straight line. Which arrangement exerts the strongest magnitude of electric force on a positive charge when placed at point P?Image 1) + - P 2) - + P
3x10^8/107 =2803738 =2.80
If an FM radio station transmits at 107 MHz, then calculate the wavelength in meters of that radio wave.
c=1 (constant) c/0.3c 1/0.3 = 3.33
If light travels at speed c in air, then what is the refractive index of a material in which light travels at speed 0.3 c?
The + + P arrangement exerts the strongest net magnitude of electric force on a positive charge placed at P.
Image 1) + P + 2) + + P
The - P + arrangement exerts the strongest net magnitude of electric force on a positive charge placed at P.
Image 1) + - P 2) - P +
The - P + arrangement exerts the strongest net magnitude of electric force on a positive charge placed at P.
Image: 1) + + P 2) - P +
The + - P arrangement exerts the strongest net magnitude of electric force on a positive charge placed at P.
Image: 1) + - P 2) + P +
The + - P arrangement exerts the strongest net magnitude of electric force on a positive charge placed at P.
Image: 1) + - P 2) - P -
into decreases into clockwise
In the figure above, a loop is located near a long wire with current flowing as indicated. into out of The original B field penetrating the loop points ________ the page. increases remains the same decreases If the current in the wire decreases, then the magnetic flux Φin the loop ________. into out of no induced B field Therefore, the loop generates an induced B field that points ________ the page. clockwise counter-clockwise no induced current This induced B field is due to an induced current that flows ________ in the loop.
out of decreases out of counter-clockwise
In the figure above, a loop is located near a long wire with current flowing as indicated. into out of The original B field penetrating the loop points ________ the page. increases remains the same decreases If the current in the wire decreases, then the magnetic flux Φin the loop ________. into out of no induced B field Therefore, the loop generates an induced B field that points ________ the page. clockwise counter-clockwise no induced current This induced B field is due to an induced current that flows ________ in the loop.
out of decreasing out of counter-clockwise
In the figure above, a loop is located near a long wire with current flowing as indicated. into out of The original B field penetrating the loop points ________ the page. increases remains the same decreases If the current in the wire decreases, then the magnetic flux Φin the loop ________. into out of no induced B field Therefore, the loop generates an induced B field that points ________ the page. clockwise counter-clockwise no induced current This induced B field is due to an induced current that flows ________ in the loop.
into increases out of counter-clockwise
In the figure above, a loop is located near a long wire with current flowing as indicated. into out of The original B field penetrating the loop points ________ the page. increases remains the same decreases If the current in the wire increases, then the magnetic flux Φ in the loop ________. into out of no induced B field Therefore, the loop generates an induced B field that points ________ the page. clockwise counter-clockwise no induced current This induced B field is due to an induced current that flows ________ in the loop.
Into remains the same no induced B field no induced current
In the figure above, a loop is located near a long wire with current flowing as indicated. into out of The original B field penetrating the loop points ________ the page. increases remains the same decreases If the current in the wire remains the same, then the magnetic flux Φ in the loop ________. into out of no induced B field Therefore, the loop generates an induced B field that points ________ the page. clockwise counter-clockwise no induced current This induced B field is due to an induced current that flows ________ in the loop.
into remains the same no induced B field no induced current
In the figure above, a loop is located near a long wire with current flowing as indicated. into out of The original B field penetrating the loop points ________ the page. increases remains the same decreases If the current in the wire remains the same, then the magnetic flux Φ in the loop ________. into out of no induced B field Therefore, the loop generates an induced B field that points ________ the page. clockwise counter-clockwise no induced current This induced B field is due to an induced current that flows ________ in the loop.
out of remains the same no induced B field no induced current
In the figure above, a loop is located near a long wire with current flowing as indicated. into out of The original B field penetrating the loop points ________ the page. increases remains the same decreases If the current in the wire remains the same, then the magnetic flux Φ in the loop ________. into out of no induced B field Therefore, the loop generates an induced B field that points ________ the page. clockwise counter-clockwise no induced current This induced B field is due to an induced current that flows ________ in the loop.
More examples in practice test IN
In the figure above, the direction of the Lorentz force on a positive particle with velocity v in the B-field is _________. A. left B. up C. down D. in E. out
UP More examples in practice test
In the figure shown, a wire is oriented perpendicular to the screen with a current that is moving out . The direction of the magnetic field B at point to the right of the wire is _________.
Add all the W up then divide by the V = 11.25
In the livingroom of your house you would like to run a 360 W television, a 30 W phone charger, a 720 W space heater, and two 120 W lights. Assuming your house is wired for 120 Volts, how much current will be pulled by these electrical devices? Amps
sin40/sin22
Light traveling in air enters a material at an angle of 40 degrees with respect to the normal. The refracted beam in the material makes an angle of 22 degrees with respect to the normal. Calculate the index of refraction of the material
What is the total equivalent resistance Rtot of the circuit? Add R1 and R2 together =140 What are the magnitudes of the current in the circuit? = 280/140 = 2 What is the magnitude of the potential V2 across resistor R2? 2x 100 = 200
The circuit shown below has a 280 V battery connected to two resistors in series with R1 = 40 Ω and R2 = 100 Ω.
(-4 + -5)-0 - -4 =-5/2 =-2.5
The figure above shows four very thin parallel planes of charge with equal separation between them. The charge density on plate 1 is -4 σ. The charge density on plate 2 is -5 σ. The charge density on plate 3 is 0 σ. The charge density on plate 4 is -4 σ. Your answers for the electric field must include the correct sign. We choose positive electric field along the positive x-direction. What is the Electric Field at point C? (in units of σ/ε0)
-4 + 0 + -1 + -4 = -9 -9/2 = -4.5
The figure above shows four very thin parallel planes of charge with equal separation between them. The charge density on plate 1 is -4 σ. The charge density on plate 2 is 0 σ. The charge density on plate 3 is -1 σ. The charge density on plate 4 is -4 σ. Your answers for the electric field must include the correct sign. We choose positive electric field along the positive x-direction. What is the Electric Field at point E? (in units of σ/ε0)
-(5+1+0+5)= -1 -1/2= -0.5
The figure above shows four very thin parallel planes of charge with equal separation between them. The charge density on plate 1 is -5 σ. The charge density on plate 2 is 1 σ. The charge density on plate 3 is 0 σ. The charge density on plate 4 is 5 σ. Your answers for the electric field must include the correct sign. We choose positive electric field along the positive x-direction. What is the Electric Field at point A? (in units of σ/ε0)
0-(-2+-3+-1)=. 6 6/2=3
The figure above shows four very thin parallel planes of charge with equal separation between them. The charge density on plate 1 is 0 σ. The charge density on plate 2 is -2 σ. The charge density on plate 3 is -3 σ. The charge density on plate 4 is -1 σ. Your answers for the electric field must include the correct sign. We choose positive electric field along the positive x-direction. What is the Electric Field at point B? (in units of σ/ε0) σ/ε0
(5+3+2)- -1= 5 5/2 = 2.5
The figure above shows four very thin parallel planes of charge with equal separation between them. The charge density on plate 1 is 5 σ. The charge density on plate 2 is -3 σ. The charge density on plate 3 is 2 σ. The charge density on plate 4 is -1 σ. Your answers for the electric field must include the correct sign. We choose positive electric field along the positive x-direction. What is the Electric Field at point D? (in units of σ/ε0)
TrueTrue True (count the arrows)
The figure above shows the electric field lines for negative and positive charges of different magnitudes. Choose true or false for each statement?A negative test charge placed between the left and right charges will move to the right. The charge on the left is negative.The charge on the left is larger than the charge on the right.
A and D are both zero (0) To calculate B: Multiply the middle plane (2) by 10^9 2x10^-9= 2e-9 -Then divide that by 2 x 8.85x10^-12 =1.1299 =112.99=B so... C= -112.99
The figure above shows three very thin parallel planes of charge with equal separation 2 cm between them. The charge density of the middle plane is +2 nC/m2 (nC = "nano Coulomb") and that of the two outer planes is -1nC/m2. Your answers for the electric field must include the correct sign. We choose positiveelectric field along the positivey-direction. What is the electric field at point A?N/C Tries 0/2 What is the electric field at point B?N/C Tries 0/2 What is the electric field at point C?N/C Tries 0/2 What is the electric field at point D?N/C Tries 0/2
Magnet A is repelled to the left and Magnet B is attracted to the left.
The figure below shows an electromagnetic coil of wire placed between two permanent bar magnets. The direction of the current in the wire is shown by the arrows.(clock-wise when viewed from the right of the coil.) Assuming that the bar magnets do not effect each other, Which of the following statements best describes the effect of the electromagnetic coil on the two bar magnets? Magnet A is repelled to the left and Magnet B is repelled to the right.Magnet A is repelled to the left and Magnet B is attracted to the left.Magnet A is attracted to the right and Magnet B is repelled to the right.Magnet A is attracted to the right and Magnet B is attracted to the left.Neither Magnet A nor Magnet B is effected by the electromagnet.
Point E
The figure below shows two charges, Q1 and Q2, as well as several positions labeled A through E.Both charges are negative, and the magnitude of charge 1 is several times smaller than that of charge 2. At which one of the positions could you expect the net force on a third negative charge to be zero?
Point C
The figure below shows two charges, Q1 and Q2, as well as several positions labeled A through E.Both charges are positive, and the magnitude of charge 1 is several times larger than that of charge 2. At which one of the positions could you expect the net force on a third negative charge to be zero?
Point E
The figure below shows two charges, Q1 and Q2, as well as several positions labeled A through E.Both charges are positive, and the magnitude of charge 1 is several times smaller than that of charge 2. At which one of the positions could you expect the net force on a third negative charge to be zero?
Point D
The figure below shows two charges, Q1 and Q2, as well as several positions labeled A through E.Both charges are positive, and the magnitude of charge 1 is the same as that of charge 2. At which one of the positions could you expect the net force on a third negative charge to be zero?
Point D
The figure below shows two charges, Q1 and Q2, as well as several positions labeled A through E.Both charges are positive, and the magnitude of charge 1 is the same as that of charge 2. At which one of the positions could you expect the net force on a third positive charge to be zero?
Point B
The figure below shows two charges, Q1 and Q2, as well as several positions labeled A through E.Charge 1 is negative, charge 2 is positive, and the magnitude of charge 1 is several times larger than that of charge 2. At which one of the positions could you expect the net force on a third positive charge to be zero?
Point A
The figure below shows two charges, Q1 and Q2, as well as several positions labeled A through E.Charge 1 is negative, charge 2 is positive, and the magnitude of charge 1 is several times smaller than that of charge 2. At which one of the positions could you expect the net force on a third negative charge to be zero?
Point B
The figure below shows two charges, Q1 and Q2, as well as several positions labeled A through E.Charge 1 is positive, charge 2 is negative, and the magnitude of charge 1 is several times larger than that of charge 2. At which one of the positions could you expect the net force on a third positive charge to be zero?
Point A
The figure below shows two charges, Q1 and Q2, as well as several positions labeled A through E.Charge 1 is positive, charge 2 is negative, and the magnitude of charge 1 is several times smaller than that of charge 2. At which one of the positions could you expect the net force on a third negative charge to be zero?
Point A
The figure below shows two charges, Q1 and Q2, as well as several positions labeled A through E.Charge 1 is positive, charge 2 is negative, and the magnitude of charge 1 is several times smaller than that of charge 2. At which one of the positions could you expect the net force on a third positive charge to be zero?
5 meters
The graph to the right shows the potential V as a function of position x for a non-uniform electric field. At which position is the magnitude of the electric field the greatest.?
B and C
The graph to the right shows the potential V as a function of position x for a non-uniform electric field. In which region(s) is the electric field positive, oriented to the right? A D E&F C&D
80
The kinetic energy of a positron after it accelerates from rest through a potential difference of 80 V is (in eV).
280
The kinetic energy of a proton after it accelerates from rest through a potential difference of 280 V is (in eV).
380
The kinetic energy of an unknown particle with +e charge after it accelerates from rest through a potential difference of 380 V is (in eV).
into, decreases, into, clockwise
The north pole of a bar magnet is moved away from the center of the loop of copper wire shown below. Choose the appropriate word choices below that correctly complete the blanks in the following four sentences:1. The original B field from the bar magnet penetrating the loop points ________ the page. 2. As the north pole of the bar magnet is moved away from the loop, the magnetic flux in the loop ________.3. Therefore, the loop generates an induced B field that points ________ the page. 4. This induced B field is due to an induced current that flows ________ in the loop. out of, decreases, out of, counter-clockwise into, increases, out of, counter-clockwise into, decreases, into, clockwise out of, increases,out of, counter-clockwise into, decreases, into, counter-clockwise
into, increases, out of, counter-clockwise
The north pole of a bar magnet is moved toward the center of the loop of copper wire shown below. Choose the appropriate word choices below that correctly complete the blanks in the following four sentences:1. The original B field from the bar magnet penetrating the loop points ________ the page. 2. As the north pole of the bar magnet is moved toward the loop, the magnetic flux in the loop ________.3. Therefore, the loop generates an induced B field that points ________ the page. 4. This induced B field is due to an induced current that flows ________ in the loop.
out of, decreases, out of, counter-clockwise
The south pole of a bar magnet is moved away from the center of the loop of copper wire shown below. Choose the appropriate word choices below that correctly complete the blanks in the following four sentences:1. The original B field from the bar magnet penetrating the loop points ________ the page. 2. As the south pole of the bar magnet is moved away from the loop, the magnetic flux in the loop ________.3. Therefore, the loop generates an induced B field that points ________ the page. 4. This induced B field is due to an induced current that flows ________ in the loop. into, increases, into, counter-clockwise out of, increases, into, counter-clockwise into, increases, out of, clockwise out of, increases, out of, counter-clockwise out of, decreases, out of, counter-clockwise
out of, increases, into, clockwise
The south pole of a bar magnet is moved toward the center of the loop of copper wire shown below. Choose the appropriate word choices below that correctly complete the blanks in the following four sentences:1. The original B field from the bar magnet penetrating the loop points ________ the page. 2. As the south pole of the bar magnet is moved toward the loop, the magnetic flux in the loop ________.3. Therefore, the loop generates an induced B field that points ________ the page. 4. This induced B field is due to an induced current that flows ________ in the loop. Incorrect into, decreases,out of, counter-clockwise Incorrect out of, increases, out of, clockwise out of, increases, into, clockwise Incorrect into, increases, into, clockwise Incorrect into, increases, out of, clockwise
Do this question last (can't figure it out) Q1 = (Q1Q2/ r1^2) + [(Q1Q3)/(r1+r2)^2] (75x 3)/(5^2) + ( 75 x 72)/ (5+1)^2 =159 Q2 = (Q1Q2/ r1^2) - (Q2Q3/r2^2) (75 x 3)/(5^2) - (3 x 72)/(1^2) =-207 Q3= (Q1Q3)/(r1+r2)^2 + Q2Q3/r2^2 =(75 x 72)/(5+1)^2 - (3x72)/1^2 =66 Sum is 0
Three point charges are arranged in a horizontal line as shown below. Find the electric forces (in units of kQ2/R2) on the charges given the following: Q1 = -75 Q, Q2 = 3 Q, Q3 = 72 Q, r1 = 5 R, and r2 = 1 R. Remember that a positive force points to the right and a negative force points to the left.
Q1= 208 Q2= 204 Q3= -4
Three point charges are arranged in a horizontal line as shown below. Find the electric forces (in units of kQ2/R2) on the charges given the following: Q1 = 50 Q, Q2 = -4 Q, Q3 = -196 Q, r1 = 5 R, and r2 = 2 R. Remember that a positive force points to the right and a negative force points to the left.
cos()^2 x .5 x W cos (35)= 0.8192 0.8192^2 =0.6710 0.6710 x 0.5 x 70 =23.49
Unpolarized light of intensity 70 W/m2 is incident on polarizer #1. After passing through polarizer #1, the light then passes through polarizer #2 whose transmission axis is at 35 degrees to that of polarizer #1. What is the intensity of the light transmitted through polarizer #2? (in units of W/m2)
cos(25)=0.9063 0.9063^2= 0.8214 0.8214x 60 = =49.28
Vertically polarized light with an intensity of 60 W/m2 passes through a polarizer whose transmission axis is at an angle of 25 degrees with the vertical. What is the intensity of the transmitted light?
C2 + C3 = 110 C1xC23/C1+C23 =46.3
What is the equivalent capacitance (in units of μF) between points A and B in the following circuit where, C1 = 80 μF, C2 = 50 μF, C3 = 60 μF,
3x10^17 / 2480
What is the frequency of the light with a wavelength 2480 nm?
W/ 4pi(r^2) 100/ 4xpi x (0.06^2) =2210.49
What is the intensity of a 100 -W light bulb at a distance 6 cm from the bulb's center?
5 x 80 = 400 400/4^2 = 25 KQ^2/R^2
What is the magnitude of the electric force between two point charges with Q1 = 5 Q and Q2 = -80 Q at a distance of 4 R?
D Correct: Approximately parallel to the y-axis. Correct: Approximately parallel to the x-axis.
Where do you expect the strongest electric field? What is the direction of the electric field at C? What is the direction of the electric field at D?
1: radio waves 7: gamma rays 6: X-rays 4: light 3: infrared 2: microwaves 5: ultraviolet
Rank the following parts of the electromagnetic(EM) spectrum from lowest to highest ENERGY.
UVB: UV radiation that induces the production of vitamin D in the skin, thereby preventing rickets. infrared: Radiation emitted by any object at a temperature above zero Kelvin and can be "seen" using special goggles. UVB: UV radiation that causes sunburn and is primarily absorbed by sunscreen having a high SPF value. radio waves: Radiation used for communication devices. UVC: UV radiation that is strongly absorbed by ozone in the stratosphere. x-rays: Ionizing radiation used for high-resolution imaging of bones in the human body. microwaves: Radiation used to heat food by causing water molecules to move around. visible: Radiation detected by the human eye. UVA: UV radiation that does not cause sunburn, but can generate highly reactive radicals that can damage DNA. x-rays: Ionizing radiation used for high-resolution imaging of bones in the human body. gamma rays: Ionizing radiation created by radioactive materials that is highly dangerous to humans.
Choose the appropriate regions of the EM spectrum. Note that answers may be used multiple times or not at all.
900: What wavelength of light is too long to be visible to the human eye? 750: What is the longest wavelength of light that our eyes usually can see? 400: What is the shortest wavelength of light that our eyes usually can see? 280: What is the shortest wavelength of UVB light? 400: What wavelength of light do we call violet? 100: What is the shortest wavelength of UVC light? 900: What wavelength of light is deep in the infrared region? 315: What is the shortest wavelength of UVA light? 750: What wavelength of light do we call red? 100: What wavelength of light is absorbed by the atmosphere and doesn't reach the Earth's surface?
Choose the appropriate wavelengths of light in nanometers. Note that answers may be used multiple times or not at all.
Correct: For light traveling from air to glass, the ray becomes bent toward the normal. Correct: Light travels at a faster speed in air than in glass. Correct: For light traveling from glass to air, the refraction angle is larger than the incidence angle. Correct: For light traveling from air, through a glass block, then exiting into air, the exiting ray is parallel to the incident ray. Correct: For light traveling from glass to air, the incidence angle is smaller than the refraction angle. Correct: For light traveling from air to glass, the incidence angle is larger than the refraction angle. False: Incorrect For light traveling from glass to air, the ray becomes bent toward the normal. Incorrect For light traveling from air to glass, the incidence angle is smaller than the refraction angle. Incorrect For light traveling from air to glass, the refraction angle is larger than the incidence angle. Incorrect For light traveling from glass to air, the incidence angle is larger than the refraction angle. Incorrect For light traveling from glass to air, the incidence angle is larger than the refraction angle. Incorrect For light traveling from glass to air, the refraction angle is smaller than the incidence angle. Incorrect For light traveling from glass to air, the ray becomes bent toward the normal. Incorrect For light traveling from air to glass, the refraction angle is larger than the incidence angle. Incorrect For light traveling from air to glass, the ray becomes bent away from the normal. Incorrect For light traveling from glass to air, the incidence angle is larger than the refraction angle. Incorrect For light traveling from air to glass, the incidence angle is smaller than the refraction angle. Incorrect Light travels at a slower speed in air than in glass.
Choose the correct statement regarding light traveling in air and glass mediums. Assume that the angle of incidence is not perpendicular to the surface. Refractive index of air is nair=1.00029; refractive index of glass is nglass=1.517.
1: White light with all colors is emitted by the sun. 3: When interacting with molecules, red light with longer wavelength scatters less. 2: White light interacts with molecules in the atmosphere. 4: Light that is primarily red continues along the path from the sun to your eyes.
Choose the steps below in the appropriate order to explain why sunsets can appear red.
3: When interacting with molecules, blue light with shorter wavelength scatters more in all directions. 2: White light interacts with molecules in the atmosphere. 4: Light that is primarily blue comes from all directions in the sky. 1: White light with all colors is emitted by the sun.
Choose the steps below in the appropriate order to explain why the sky is blue.
All False: A negative charge moved from point A to point C will have a positive change in potential energy. The kinetic energy of a positive charge moved from point B to point A will increase. The kinetic energy of a negative charge moved from point A to point B will increase. The kinetic energy of a negative charge moved from point B to point A will decrease. The electrostatic force on a charge is greater at point A than at point B The kinetic energy of a negative charge moved from point B to point A will decrease. The electrostatic force on a charge is weaker at point A than at point C The kinetic energy of a negative charge moved from point A to point B will increase. The kinetic energy of a negative charge moved from point A to point C will increase. A positive charge moved from point A to point C will have a negative change in potential energy. The electrostatic force on a charge is weaker at point C than at point B A positive charge moved from point A to point C will have a positive change in potential energy. The kinetic energy of a negative charge moved from point A to point C will increase. The electrostatic force on a charge is weaker at point B than at point A The kinetic energy of a negative charge moved from point C to point A will increase. A negative charge moved from point A to point C will have a positive change in potential energy. false: Point B is at a higher potential than point A false: The electrostatic force on a charge is weaker at point C than at point B false: The potential ENERGY difference between points A and B is independent of the the charge placed at these points. false: The potential energy of a negative charge moved from point A to point B will decrease. All true: The kinetic energy of a positive charge moved from point B to point A will decrease. The kinetic energy of a negative charge moved from point B to point A will increase. The electrostatic force on a charge is the same at points A and C A negative charge moved from point A to point C will have no change in potential energy. The electrostatic force on a charge is the same at points A and B true: The potential difference between points A and B is independent of the charge placed at these points. true: The potential energy of a negative charge moved from point A to point B will increase. true: The plate on the left is positively charged true: A negative charge at Point B is at a lower potential than point C true: A positive charge moved from point A to point C will have no change in potential energy.
Choose true or false for each statement below about the uniform electric field shown above.
True: If an object is placed 8.1 cm from a converging lens with f = 4 cm, then its image will be reduced and real. A converging lens produces an enlarged real image when the object is placed just beyond its focal point (Region 2). true: A converging lens produces an enlarged virtual image when the object is placed between the lens and its focal point (Region 3). False: If an object is placed 3.9 cm from a converging lens with f = 4 cm, then its image will be enlarged and real If an object is placed 7.9 cm from a converging lens with f = 4 cm, then its image will be enlarged and virtual. If an object is placed 3.9 cm from a converging lens with f = 4 cm, then its image will be reduced and real. false: If an object is placed 3.9 cm from a converging lens with f = 4 cm, then its image will be reduced and virtual. false: If an object is placed 8.1 cm from a converging lens with f = 4 cm, then its image will be reduced and virtual. false: A converging lens produces an enlarged virtual image when the object is placed just beyond its focal point (Region 2). false: If an object is placed 4.1 cm from a converging lens with f = 4 cm, then its image will be reduced and virtual. false: A converging lens produces an enlarged virtual image when the object is placed far beyond its focal point (Region 1). false: If an object is placed 4.1 cm from a converging lens with f = 4 cm, then its image will be reduced and real. false: If an object is placed 4.1 cm from a converging lens with f = 4 cm, then its image will be enlarged and virtual. false: If an object is placed 7.9 cm from a converging lens with f = 4 cm, then its image will be reduced and real.
Choose true or false for each statement regarding a converging lens.
True: If an object is placed 3.9 cm from a diverging lens with f = 4 cm, then its image will be reduced and virtual. true: A diverging lens produces a reduced virtual image when the object is placed between the lens and its focal point (Region 3). true: If an object is placed 4.1 cm from a diverging lens with f = 4 cm, then its image will be reduced and virtual. true: A diverging lens produces a reduced virtual image when the object is placed just beyond its focal point (Region 2). true: If an object is placed 7.9 cm from a diverging lens with f = 4 cm, then its image will be reduced and virtual. False: If an object is placed 3.9 cm from a diverging lens with f = 4 cm, then its image will be reduced and real. If an object is placed 7.9 cm from a diverging lens with f = 4 cm, then its image will be enlarged and virtual. false: If an object is placed 7.9 cm from a diverging lens with f = 4 cm, then its image will be reduced and real. A diverging lens produces a reduced real image when the object is placed between the lens and its focal point (Region 3). If an object is placed 8.1 cm from a diverging lens with f = 4 cm, then its image will be enlarged and virtual. false: If an object is placed 8.1 cm from a diverging lens with f = 4 cm, then its image will be enlarged and real. false: A diverging lens produces a reduced real image when the object is placed just beyond its focal point (Region 2). false: If an object is placed 7.9 cm from a diverging lens with f = 4 cm, then its image will be enlarged and real. false: If an object is placed 3.9 cm from a diverging lens with f = 4 cm, then its image will be enlarged and real. false: If an object is placed 8.1 cm from a diverging lens with f = 4 cm, then its image will be enlarged and virtual. false: A diverging lens produces a reduced real image when the object is placed far beyond its focal point (Region 1). false: If an object is placed 4.1 cm from a diverging lens with f = 4 cm, then its image will be enlarged and virtual. false: If an object is placed 8.1 cm from a diverging lens with f = 4 cm, then its image will be reduced and real. false: If an object is placed 4.1 cm from a diverging lens with f = 4 cm, then its image will be enlarged and real. false: If an object is placed 8.1 cm from a diverging lens with f = 4 cm, then its image will be reduced and real. false: A diverging lens produces an enlarged virtual image when the object is placed far beyond its focal point (Region 1).
Choose true or false for each statement regarding a diverging lens.
FalseFalseFalse
Choose true or false for each statement. true false Near a negative charge, the electric field forms circular paths near that charge. true false If the electric field near a point charge points toward that charge, then the charge is positive. true false Near a negative charge, the electric field points away from that charge.
TrueTrueFalse
Choose true or false for each statement. true false Near a negative charge, the electric field points toward that charge. true false If the electric field near a point charge points toward that charge, then the charge is negative. true false Near a negative charge, the electric field points away from that charge.
All of these are False: false: The electric field is dependent on the distance between the plates. false: The voltage of a connected charged capacitor decreases when the plate area is increased. false: The voltage of a disconnected charged capacitor increases when the plates are brought closer together. false: Two identical capacitors in parallel have half the capacitance of each individual one. false: If you connect two different capacitors in series in a circuit, then the charge on each of them is different. All of these are True: The capacitance depends on the material between the plates. The voltage of a disconnected charged capacitor decreases when the plates are brought closer together. The capacitance is proportional to the area A. The voltage of a disconnected charged capacitor increases when the plates are pulled apart. The capacitance is inversely proportional to the plate separation d. true: If you connect two different capacitors in parallel in a circuit, then the voltage across each of them is the same. true: If you connect two different capacitors in parallel in a circuit, then the voltage across each of them is the same. true: If you connect two different capacitors in parallel in a circuit, then the charge on each of them is different. true: Three identical capacitors in series have one third the capacitance of each individual one. true: Three identical capacitors in parallel have triple the capacitance of each individual one. true: If you connect two different capacitors in series in a circuit, then the charge on each of them is the same. true: If you connect two different capacitors in series in a circuit, then the voltage across each of them is different.
Choose true or false for each statement regarding a parallel plate capacitor.. Choose true or false for each statement regarding capacitors in a circuit.
True: true: If an object is placed 4.1 cm from a concave mirror with f = 4 cm, then its image will be enlarged and real. true: If an object is placed 3.9 cm from a concave mirror with f = 4 cm, then its image will be enlarged and virtual. true: A concave mirror produces an enlarged virtual image when the object is placed between the mirror and its focal point (Region 3). true: If an object is placed 8.1 cm from a concave mirror with f = 4 cm, then its image will be reduced and real. False: If an object is placed 8.1 cm from a concave mirror with f = 4 cm, then its image will be enlarged and real. A concave mirror produces an enlarged real image when the object is placed between the mirror and its focal point (Region 3). A concave mirror produces an enlarged real image when the object is placed far beyond its focal point (Region 1). If an object is placed 7.9 cm from a concave mirror with f = 4 cm, then its image will be enlarged and virtual. If an object is placed 3.9 cm from a concave mirror with f = 4 cm, then its image will be reduced and virtual. false: If an object is placed 4.1 cm from a concave mirror with f = 4 cm, then its image will be reduced and virtual. false: If an object is placed 7.9 cm from a concave mirror with f = 4 cm, then its image will be reduced and real. false: If an object is placed 4.1 cm from a concave mirror with f = 4 cm, then its image will be enlarged and virtual. false: If an object is placed 8.1 cm from a concave mirror with f = 4 cm, then its image will be reduced and virtual. false: A concave mirror produces an enlarged virtual image when the object is placed just beyond its focal point (Region 2). false: If an object is placed 7.9 cm from a concave mirror with f = 4 cm, then its image will be reduced and virtual. false: A concave mirror produces an enlarged virtual image when the object is placed far beyond its focal point (Region 1).
Choose true or false for each statement regarding concave mirrors.
True: If an object is placed 7.9 cm from a convex mirror with f = 4 cm, then its image will be reduced and virtual. False: If an object is placed 4.1 cm from a convex mirror with f = 4 cm, then its image will be enlarged and real. false: If an object is placed 4.1 cm from a convex mirror with f = 4 cm, then its image will be reduced and real. If an object is placed 7.9 cm from a convex mirror with f = 4 cm, then its image will be reduced and real. A convex mirror produces an enlarged virtual image when the object is placed between the mirror and its focal point (Region 3). false: A convex mirror produces a reduced real image when the object is placed between the mirror and its focal point (Region 3). A convex mirror produces a reduced real image when the object is placed far beyond its focal point (Region 1). If an object is placed 3.9 cm from a convex mirror with f = 4 cm, then its image will be enlarged and virtual. false: If an object is placed 8.1 cm from a convex mirror with f = 4 cm, then its image will be enlarged and real. false: If an object is placed 4.1 cm from a convex mirror with f = 4 cm, then its image will be enlarged and virtual. false: A convex mirror produces a reduced real image when the object is placed just beyond its focal point (Region 2). false: If an object is placed 3.9 cm from a convex mirror with f = 4 cm, then its image will be reduced and real. false: If an object is placed 7.9 cm from a convex mirror with f = 4 cm, then its image will be enlarged and virtual. false: If an object is placed 8.1 cm from a convex mirror with f = 4 cm, then its image will be reduced and real. false: If an object is placed 8.1 cm from a convex mirror with f = 4 cm, then its image will be enlarged and virtual. false: If an object is placed 3.9 cm from a convex mirror with f = 4 cm, then its image will be enlarged and real.
Choose true or false for each statement regarding convex mirrors.
On practice exam
Choose true or false for each statement regarding resistors in a circuit.
True: The resistivity depends on the temperature of most metal wires. While maintaining a constant voltage V, the current I decreases when the cross-sectional area A of a wire contracts While maintaining a constant voltage V, the current I increases when the resistivity ρ of a wire decreases. While maintaining a constant voltage V, the current I decreases when the cross-sectional area A of a wire contracts. While maintaining a constant voltage V, the current I increases when the cross-sectional area A of a wire expands. The resistivity ρ is proportional to the resistance R of a wire. The resistance is inversely proportional to the cross-sectional area Aof the wire. true: The resistance is inversely proportional to the cross-sectional area A of the wire. true: While maintaining a constant voltage V, the current I increases when the cross-sectional area A of a wire expands. False: false: While maintaining a constant voltage V, the current I increases when the resistivity ρ of a wire increases. While maintaining a constant voltage V, the current I increases when the resistivity ρ of a wire increases. While maintaining a constant voltage V, the current I decreases when the cross-sectional area A of a wire expands. The resistance is inversely proportional to the length of the wire L. While maintaining a constant voltage V, the current I decreases when the resistivity ρ of a wire decreases. The resistivity ρ is inversely proportional to the resistance Rof a wire. While maintaining a constant voltage V, the current I decreases when the resistivity ρ of a wire decreases. While maintaining a constant voltage V, the current Iincreases when the cross-sectional area Aof a wire contracts. The resistance is inversely proportional to the length of the wire L. While maintaining a constant voltage V, the current I increases when the resistivity ρ of a wire increases. While maintaining a constant voltage V, the current I decreases when the resistivity ρ of a wire decreases. The resistance is proportional to the cross-sectional area A of the wire. The resistance is inversely proportional to the length of the wire L. While maintaining a constant voltage V, the current Idecreases when the resistivity ρ of a wire decreases The resistivity ρ is inversely proportional to the resistance R of a wire. While maintaining a constant voltage V, the current I increases when the cross-sectional area A of a wire contracts The resistance is proportional to the cross-sectional area A of the wire.
Choose true or false for each statement regarding the resistance of a wire.
True: true: The focal length f is positive for converging lenses. true: Virtual images appear on same side of the lens as the object and have a negative value for the image distance. true: The magnification m is positive for upright images. true: Real images appear on the opposite side of the lens from the object and have a positive value for the image distance. true: The magnification m is negative for inverted images. true: The focal length f is negative for diverging lenses. False: false: The magnification m is negative for upright images. false: The focal length f is negative for converging lenses. false: The magnification m is positive for inverted images. false: The focal length f is positive for diverging lenses.
Choose true or false for each statement regarding the sign conventions for lenses.
True: Virtual images appear appear behind a mirror and have a negative value for the image distance. The focal length f is positive for concave mirrors. The magnification m is negative for inverted images. The magnification m is positive for upright images. true: The magnification m is negative for inverted images. False: The focal length f is positive for convex mirrors. The magnification m is positive for inverted images. Real images appear in front of a mirror and have a negative value for the image distance. Virtual images appear behind a mirror and have a positive value for the image distance. false: The magnification m is negative for upright images.
Choose true or false for each statement regarding the sign conventions for mirrors.
TrueTrueFalse
Choose true or false for each statement. true false If the magnitude of charge 1 is larger than charge 2, then the density of electric field lines near charge 1 is larger than near charge 2. true false Near a negative charge, the electric field points toward that charge. true false Near a positive charge, the electric field forms circular paths near that charge.
FalseTrueTrue
Choose true or false for each statement. true false If the magnitude of charge 1 is larger than charge 2, then the density of electric field lines near charge 1 is smaller than near charge 2. true false If the density of electric field lines near charge 1 is smaller than near charge 2, then the magnitude of charge 1 is smaller than charge 2. true false Near a negative charge, the electric field points toward that charge.
Correct: If θ1 > θ2, then light travels faster in material #1. If θ1 > θ2, then material #2 has a larger index of refraction. If θ1 < θ2, then material #1 has a larger index of refraction. Correct: If θ1 < θ2, then material #2 has a smaller index of refraction. Correct: If θ1 > θ2, then material #1 has a smaller index of refraction. Correct: If θ1 < θ2, then light travels slower in material #1. False: -If θ1 > θ2, then light travels slower in material #2. -If θ1 > θ2, then light travels slower in material #1. -If θ1 > θ2, then light travels faster in material #2. -If θ1 > θ2, then material #1 has a larger index of refraction. -If θ1 < θ2, then material #1 has a smaller index of refraction. -f θ1 < θ2, then material #2 has a larger index of refraction. If θ1 < θ2, then light travels slower in material #2. If θ1 < θ2, then light travels faster in material #1. If θ1 > θ2, then light travels faster in material #2.
Light travels from material #1 with refractive index n1 and incidence angle θ1 into material #2 with refractive index n2 and refraction angle θ2. Choose the correct statement below.
2: X-rays 7: radio waves 4: light 5: infrared 6: microwaves 1: gamma rays 3: ultraviolet
Rank the following parts of the electromagnetic spectrum from shortest to longest WAVELENGTH.
