16.

Explain what happens to a wire that is moved through a magnetic field.

17.

The frequency of orange light is 5.01 x 10¹⁴ Hz. How much energy does a photon of orange light carry? (h = 6.626 x 10^-34 Js; 1 eV = 1.60 x 10^-19 J)

	7.56 eV
	5.43 eV
	2.07 eV
	3.32 eV

18.

Which of the following experiments was the first to show the wave-particle duality of light?

	Einstein's Photoelectric Effect
	Maxwell's Electromagnetic Induction
	Modern Double-Slit Experiment
	Young's Double-Slit Experiment

19.

You bring the north pole of one magnet close to the south pole of another magnet. Which of the following is/are true? Check all that apply.

	There is a repulsive force between the north pole of the one and the south pole of the other.
	The field lines move from the south pole of the one to toward the north pole of the other magnet.
	The field lines move from the north pole of the one to toward the south pole of the other magnet.
	There is an attractive force between the north pole of the one and the south pole of the other.

20.

Which of the following are true regarding Earth's magnetic field? Check all that apply.

	the magnetic poles drift about 10-15 km per year
	the magnetic north pole is actually the south pole of Earth's "magnet"
	scientists are not really sure why Earth acts like a magnet
	the magnetic north pole is stationary

22.

You heat up a piece of metal and bring it close to a strong magnet. You let the piece of metal cool while in place. What happens?

	The induced magnet will stay a magnet after it cools.
	The magnetic ability of the original strong magnet will be reduced by the presence of the non-magnetic material.
	Nothing happens in this case, because there was no contact between the metal and strong magnet.
	After the induced magnet is moved away from the strong magnet, it will return to its non-magnetic form.

23.

What happened as a result of the ultraviolet catastrophe?

	scientists understood that light does not obey the laws of physics
	scientists determined that light behaved only as waves
	scientists abandoned classical physics altogether
	scientists determined classical physics does not work for all things

24.

Which of the following electromagnets will have the weaker force assuming the number of coils around the core is the same?

	a wire with a 0.50 A current
	a wire with a 2.00 A current
	a wire with a 1.00 A current
	a wire with a 1.50 A current

25.

A proton moves with an unknown velocity through a magnetic field of 6.79 x 10^-4 T that points directly south. The proton experiences a force of 3.45 x 10^-16 N directly east. What is the magnitude of the velocity? (charge of a proton is +1.6 x 10^-19 C)

	1.23 x 107 m/s
	3.18 x 106 m/s
	3.18 x 107 m/s
	1.23 x 106 m/s

26.

Which of the following electromagnets will have the weaker force assuming the current through each is the same?

	A battery with 15 loops of wire around the nail.
	A battery with 10 loops of wire around the nail.
	A battery with no loops of wire around the nail.
	A battery with 3 loops of wire around the nail.

27.

In de Broglie's equation, he shows the relationship between the wavelength of a light wave and its momentum. Which of the following is true about this relationship?

	wavelength is directly proportional to the square of momentum
	wavelength is inversely proportional to momentum
	wavelength is inversely proportional to the square of momentum
	wavelength is directly proportional to momentum

28.

During the photoelectric effect experiment, a photon is emitted with 5.73 x10^-20 J of kinetic energy. If the work function of the photosensitive surface is 0.540 eV, which is the frequency of the incident light? Show your work. (h = 6.626 x 10^-34 Js; 1 eV = 1.60 x 10^-19 J)

29.

A generator takes mechanical energy and transfers it to:

	kinetic energy
	magnetic energy
	electrical energy
	heat energy

30.

A proton moves with an unknown velocity through a magnetic field of 3.45 x 10^-3 T that points directly south. The proton experiences a force of 2.40 x 10^-15 N directly east. What direction is the proton moving?

	south
	out of the page
	west
	into the page