Test 1
If the resistance in a constant voltage circuit is doubled, the power dissipated by that circuit will
Decrease to one-half it's original value
Doubling the potential across a given capacitor causes the energy stored in that capacitor to
Double
When the current through a resistor is increased by a factor of 4, the power dissipated by the resistor.
Increases by a factor of 16
Two point charges, Q1 and Q2, are separated by a distance R. If the magnitudes of both charges are halved and their separation is also halved, what happens to the electrical force that each charge exerts on the other one?
It remains the same
When a 14.0 A current flows through an 8.00 device for 24.0 hours, how much does this cost if energy costs 0.0900 per kW•h
$3.39
The three point charges +6.0 uC, -7.0 uC, and -13 uC are placed on the x-axis at the points x= 0cm, x= 40cm, and x=120 cm, respectively. What is the electrostatic force on the -13 uC charge due to the other two charges?
0.79 N
A small glass bead has been charged to 6.9 NC. What is the strength of the electric field 2.0 cm from the center of the bead?
1.6 x 10^5 N/C
How much current will be flowing through a 22.0 m length of copper wire with radius 2.2 mm if it is connected to a source supplying 25.0 V?
1000 A
A 100-W light bulb is operated by a 110-V D.C. Source. What is the resistance of this bulb
120
What potential difference is require to cause 2.0A to flow through a resistance of 8.0
16 v
What current is flowing in a wire if 0.47 C I'd charge pass a pint in the wire in 0.20 s?
2.4 A
A 2.0 uF and a 14.0 uF capacitor are connected in series, and the series arrangement is connected in parallel to a 24.0 uF capacitor. How much capacitance would a single capacitor need to replace this combination of three capacitors?
26 uF
Two ideal parallel-plate capacitors are identical in every respect that one has twice the plate area of the other. If the smaller capacitor has capacitance C, the larger one has capacitance
2C
Two electrons are 27.0 mm apart at closest approach. What is the magnitude of the maximum electric force that they exert on each other?
3.2 x 10^-25 N
Two tiny particles have charges +30.0 uC and -9.00 uC are separated by a distance of 20.0 cm. What are the magnitude and direction of electric field midway between these two charges?
35.1 x 10^6 N/C directed towards the negative charge
If it takes 20 J of energy to move 5.0C of charge from point A to point B, what is the magnitude of the potential difference between points A and B.
4.0 V
A 2.0 uF capacitor and a 4.0 uF capacitor are connected in series across an 8.0 V potential source. What is the potential difference across the 2.0 uF capacitor?
5.3 V
If a charge generator builds a negative static charge of -10.00 uc, how many electrons are transferred to it during this process
6.25 X 10^13
When the potential difference between the plates of an ideal air-filled parallel plate capacitor is 45 V, the electric field between the plates has a strength of 850 V/m. If the plate area is 4.0 x 10^-2 m^2, what is the capacitance of this capacitor
6.7 x 10^-12
A 5.0 uC charge and a 10.0 uC point charge are initially extremely far apart. How much work does it take to bring the 5.0 uC charg to a position 6.0 mm from the 10.0 uC point charge
75 J
Three identical capacitors are connected in series across a potential source (battery). If a charge of Q flows into this combination of capacitors, how much charge does each capacitor carry?
Q
Copper wire #1 has a length L and a radius b. Copper wire #2 has a length 2L and a radius 2b. Which statement about the resistance across the ends of the wires is true?
The resistance of wire #1 is twice as high as that of wire #2
X and Y are two initially uncharged metal spheres on insulating stands, and they are in contact with each other. A positively charged rod R is brought close to X as shown in part (a) of the figure. Sphere Y is now moved away from X, as shown in part (b). What are the final charge states of X and Y?
X is negative and Y is positive
As a proton moves in the direction the electric field lines
it is moving from high potential to low potential and losing electric potential energy
Two stationary point charges q1 and q2 are shown in the figure along with a sketch of some field lines representing the electric field produced by them. What can you deduce from the sketch?
q1 is negative and q2 is positive; the magnitude of q1 is less than q2