Photoelectric Effect Quiz

What is the photoelectric effect?

• The emission of electrons from a material due to heat

• The emission of electrons from a material due to light

• The emission of electrons from a material due to electricity

• The emission of electrons from a material due to magnetism

What does Planck's constant represent in the equation E = h · f?

• The energy of a photon

• The frequency of light

• The proportionality constant between energy and frequency of a photon

• The velocity of light

What is the threshold frequency in the photoelectric effect?

• The frequency below which no electrons are emitted

• The maximum frequency that can emit electrons

• The frequency at which the maximum current flows

• The frequency where the intensity of light is highest

Who first explained the photoelectric effect?

• Albert Einstein

• Max Planck

• Niels Bohr

• Wilhelm Röntgen

If the frequency of light is increased, what happens to the energy of the emitted electrons?

• It decreases

• It stays the same

• It increases

• It becomes zero

What happens if the intensity of light is increased while keeping the frequency constant?

• The energy of the emitted electrons increases

• The number of emitted electrons increases

• The stopping voltage increases

• No change occurs

Which of the following equations represents the energy of a photon?

• E = m · c^2

• E = h · f

• E = P · V

• E = 1/2 m v^2

Increasing the intensity of light will increase the energy of individual emitted electrons.

• True

• False

In the photoelectric effect, the energy of emitted electrons depends on the light's intensity.

• True

• False

The photoelectric effect supports the idea that light behaves purely as a wave.

• True

• False