Semester 2 Physics Final Exam Review (Units 10-17)
Do electrons flow through insulators? (Unit 10: Electrostatics)
Yes
As a wave travels into a medium in which its speed increases, its wavelength would do what? (Unit 13: Waves)
increase
The greenish blue of ocean water is due mostly to absorption of what? (Unit 15: Light and Color)
infrared light
Electrons on the surface of a conductor will arrange themselves such that the electric field ________________________. (Unit 10: Electrostatics)
inside cancels to zero
Loudness of sound is most closely related to its ___________. (Unit 14: Sound)
intensity
Noise-cancelling devices such as jackhammer earphones make us of sound __________. (Unit 14: Sound)
interference
The phenomenon of beats is the result of sound ___________. (Unit 14: Sound)
interference
How are sound intensity and distance related? (Unit 14: Sound)
inversely by the square
When a wave reflects from the fixed end, the wave _________. (Unit 13: Waves)
inverts
What are the units of wave speed? (Unit 14: Sound)
m/s
What is the space surrounding a magnet known as? (Unit 12: Magnetism)
magnetic field
Like a gravitational field, an electric field has both _____ and _____. (Unit 10: Electrostatics)
magnitude, direction
In order for an object to feel a magnetic field it must be ____________. (Unit 12: Magnetism)
moving and charged
The magnetic field surrounding Earth is likely caused by ______________________. (Unit 12: Magnetism)
moving charges in the molten interior
A proton moving downward enters a region of space with magnetic field B which points right. In which direction is the force on the proton? (Unit 12: Magnetism)
out
Electric field lines point from _____ to _____. (Unit 10: Electrostatics)
positive, negative
The charge of a single electron is ____________. (Unit 11: Electric Circuits)
1.6E-19 Couloumbs
The distance between 2 adjacent antinodes is equal to what? (Unit 13: Waves)
1/2 wavelength
The time it takes light to travel across the orbit of Earth is about ___________. (Unit 15: Light and Color)
17 minutes
Moving electric charges are surrounded by what? (Unit 12: Magnetism)
Both magnetic and electric fields.
The magnetic field lines about a current-carrying wire form what? (Unit 12: Magnetism)
Circles
Roy G. BV is a common abbreviation for what? (Unit 15: Light and Color)
Colors of the visible spectrum.
What is it that travels at about the same speed of light in an electric circuit? (Unit 11: Electric Circuits)
Electric field
The electric current in a copper wire is normally composed of what? (Unit 11: Electric Circuits)
Electrons
What is the correct order of structures in increasing size? (Unit 12: Magnetism)
Electrons, Atoms, Magnetic domains, and Magnets
What are the units and definition of frequency? (Unit 14: Sound)
Hz, oscillations per sec
What is electric potential energy? And what units is it measured in? (Unit 10: Electrostatics)
It is energy per charge. It is measured in Volts (V).
What is a Volt (V) equal to? (Unit 10: Electrostatics)
Joule / Coulomb
How is light different from sound? (Unit 15: Light and Color)
Light can travel through a vacuum and sound cannot.
How can the speed of a wave be found? (Unit 13: Waves)
Multiply frequency by wavelength
To find the charge passing through a bulb in one second, if a current of 2A is passing through it, I would use: ________. (Unit 11: Electric Circuits)
Q = IT
What best describes the correct comparison of the strengths of the gravitational and electric force? (Unit 10: Electrostatics)
The electric force is much stronger.
Can charge flow through an insulator? (Unit 10: Electrostatics)
Yes
Do charges flow in a circuit? (Unit 11: Electric Circuits)
Yes
To receive an electric shock there must be __________. (Unit 11: Electric Circuits)
a difference in potential across part or all of your body
Electric charge will flow in an electric circuit when ___________. (Unit 11: Electric Circuits)
a potential difference exists
What is interference a characteristic of? (Unit 13: Waves)
all waves
The vibrations along a longitudinal wave move in a direction ____________________. (Unit 13: Waves)
along and parallel to the wave
When you buy a water pipe in a hardware store, the water isn't included. When you buy copper wire, electrons ___________________________. (Unit 11: Electric Circuits)
are already in the wire
For magnets, like poles repel each other and unlike poles _________________. (Unit 12: Magnetism)
attract each other
The earth's magnetic field most resembles a ________ magnet. (Unit 12: Magnetism)
bar
In the electric field surrounding a group of charged particles, field strength is greater where field lines are _______. (Unit 10: Electrostatics)
closest
When you double the voltage in a simple electric circuit, you double the __________. (Unit 11: Electric Circuits)
current
An electron moving out of the screen experiences a force to the left. The magnetic field is pointing __________. (Unit 12: Magnetism)
down
Electric potential is related to electric potential energy as _____________________________________________. (Unit 10: Electrostatics)
electric potential is the ratio of electric potential energy per charge
Light is what kind of energy? (Unit 15: Light and Color)
electromagnetic
What is light composed of? (Unit 15: Light and Color)
electromagnetic waves and particles called photons
An object that becomes positively charged means _______. (Unit 10: Electrostatics)
electrons have been removed
What does a wave transfer? (Unit 13: Waves)
energy
Compared to the huge force that attracts an iron tack to a strong magnet, the force that the tack exerts on the magnet is _______________. (Unit 12: Magnetism)
equally huge
The difference b/w DC and AC in electric currents is that DC charges ________________. (Unit 11: Electric Circuits)
flow in one direction
When the surface of a guitar is made to vibrate we say it undergoes ____________. (Unit 14: Sound)
forced vibration
If the frequency of a wave is doubled and if the speed remains constant, its wavelength is _________. (Unit 13: Waves)
halved
The potential energy of a compressed string and the potential energy of a charged object both depend on their _________________ and _______________. (Unit 10: Electrostatics)
locations in their respective fields, on the work done on them
The magnetic domains in a magnet produce a weaker magnet when the _____________. (Unit 12: Magnetism)
magnet is heated
When you tap various objects they produce characteristic sounds that are related to what? (Unit 14: Sound)
natural frequency
A magnetic force cannot act on an electron when it moves _____________________. (Unit 12: Magnetism)
parallel to the magnetic field lines
The frequency of a wave is the inverse of its _________. (Unit 13: Waves)
period
The time it takes a pendulum to swing to and fro is considered its ____________. (Unit 13: Waves)
period
A magnetic force acts most strongly on a current-carrying wire when it is ________________________. (Unit 12: Magnetism)
perpendicular to the magnetic field
The vibrations along a transverse wave move in a direction ____________________. (Unit 13: Waves)
perpendicular to the wave
When one side of an atom or molecule is slightly more positive (or negative) than the opposite side, we say the object is ________. (Unit 10: Electrostatics)
polarized
What is the main factor that affects the speed of a sound wave? (Unit 13: Waves)
properties of the medium
If you double both the current and voltage in a circuit, the power ______________. (Unit 11: Electric Circuits)
quadruples
Sound travels in air by a series of what? (Unit 14: Sound)
rarefactions
Photons of light that shine on glass may be ___________________. (Unit 15: Light and Color)
reflected, absorbed, or transmitted
An object's color is determined by the color of light it _______. (Unit 15: Light and Color)
reflects
If an object appears red, it ___________________. (Unit 15: Light and Color)
reflects red and absorbs all others
As a wave travels into a medium in which its speed increases, its frequency would do what? (Unit 13: Waves)
remain the same
When an object is set into vibration by a wave having a frequency that matches the natural frequency of the object, what occurs is _________________. (Unit 14: Sound)
resonance
What are the units and definition of the period of a wave? (Unit 14: Sound)
s, how long it takes for one complete oscillation
The redness of sunlight or sunset is due mostly to light that has not been what? (Unit 15: Light and Color)
scattered
The blueness of the daytime sky is due mostly to light _______. (Unit 15: Light and Color)
scattering
Sound travels faster in ____ compared to ____ ? (Unit 14: Sound)
solids , gases
Speed of sound varies with what? (Unit 14: Sound)
temperature
Thin layers of semiconducting material sandwiched together make up ___________ , which are used in almost all modern electronics. (Unit 10: Electrostatics)
transistors
Polarization occurs only for what kind of waves? (Unit 15: Light and Color)
transverse waves
The electric field is a ________. (Unit 10: Electrostatics)
vector
If the charge on a conductor is not moving, the electric field inside of a conductor is ______. (Unit 10: Electrostatics)
zero
The electric field inside of a conductor is ______. (Unit 10: Electrostatics)
zero
A wire experiences a magnetic field if ________. (Unit 12: Magnetism)
1. it carries a current 2. if it's at least perpendicular to the field 3. there is a magnetic field
A magnetic field can produce a voltage in a loop if _____________________. (Unit 12: Magnetism)
1. the magnetic field changes strength 2. the loop rotates within the field 3. the loop is removed from the field
The charge passing through a bulb in one second, if a current of 2A is passing through it, is equal to: _________. (Unit 11: Electric Circuits)
2 C
How fast does light travel? (Unit 15: Light and Color)
300 million m/s
If it takes 3 secs for light to travel to the moon and back, how far way is the moon? (Unit 15: Light and Color)
450 mill. meters
The solar radiation curve is what? (Unit 15: Light and Color)
A plot of brightness vs. frequency (or wavelength) of sunlight.
When the shadow of the moon falls on Earth we have what? (Unit 15: Light and Color)
A solar eclipse
What type of copper wire would you expect to have the least electric resistance? (Unit 11: Electric Circuits)
A thick, short wire
What is an area of force that surrounds an electric charge? (Unit 10: Electrostatics)
An electric field
What is a charged atom called? (Unit 10: Electrostatics)
An ion
The unit of charge is _______. (Unit 10: Electrostatics)
Coulomb (C)
F = kqq / d^2 is known as what? (Unit 10: Electrostatics)
Coulomb's Law
__________________ are the source of different colors that you see. (Unit 15: Light and Color)
Different wavelengths
Electric potential and electric potential energy are the same? (Unit 10: Electrostatics)
No
What are the regions of a standing wave that do not move called? (Unit 13: Waves)
Nodes
Which part of the electromagnetic spectrum travels fastest? (Unit 15: Light and Color)
None, all the same
What happens to the electric field inside the conducting sphere of a Van de Graff generator as it charges? (Unit 10: Electrostatics)
Nothing because the field is always zero.
Standing waves are the result of what? (Unit 13: Waves)
Overlapping in phase and out of phase
Frequency is the inverse of what? (Unit 14: Sound)
Period
What is not considered to charge an object? (Unit 10: Electrostatics)
Polarization
