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AP 2 Modern Physics

Authored by Eric Howard

Physics

11th Grade - University

NGSS covered

Used 31+ times

AP 2 Modern Physics
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36 questions

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1.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Light of a single wavelength is incident on a metal.  Electrons are released. The intensity of the light is then increased.
Which of the following changes occur?

Rate of electron emission: increase.
Energy of electrons: increase.
Rate of electron emission: decrease.
Energy of electrons: no change.
Rate of electron emission: decrease.
Energy of electrons: increase.
Rate of electron emission: increase.
Energy of electrons: no change.

Tags

NGSS.HS-PS4-3

NGSS.HS-PS4-4

2.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

The photoelectric effect only occurs if the light shining on the metal is:

coherent.
above a minimum intensity.
above a minimum frequency.
above a minimum wavelength.

Tags

NGSS.HS-PS4-1

NGSS.HS-PS4-4

3.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Media Image

The graph shows maximum kinetic energy of emitted electrons against frequency of incident light for a number of different metals.
Plank's constant is determined by:

the x-intercept.
the y-intercept.
the gradient.
the area under the graph.

Tags

NGSS.HS-PS4-3

4.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Media Image

The graph shows maximum kinetic energy of emitted electrons against frequency of incident light for a number of different metals.
The threshold frequency is determined by:

the x-intercept.
the y-intercept.
the gradient.
the area under the graph.

Tags

NGSS.HS-PS4-3

5.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Which statement about the photoelectric effect is correct?

Electrons are emitted instantaneously.
Electrons are not emitted below a certain wavelength.
You can change the energy of the electrons by changing the intensity.
Electron energy is independent of frequency.

Tags

NGSS.HS-PS4-3

NGSS.HS-PS4-4

6.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

The photoelectric effect is when:

Electrons collide inside a metal to release photons.
One incident metal electron releases one photon.
One incident photon releases one electron from a metal.
Photons are absorbed in to metal ions releasing electrons.

Tags

NGSS.HS-PS4-3

NGSS.HS-PS4-4

7.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

What is the maximum kinetic energy of electrons emitted from cesium (Cs), when light of frequency1015 Hz falls upon the metal? (work function for Cs is 1.8 eV)

7.728x10-19 J
4.83 eV
1.864x10-19 J
2.34 eV

Tags

NGSS.HS-PS4-3

NGSS.HS-PS4-1

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