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Stopping Potential Revisited

Kinetic energ...

Question

Kinetic energy of photoelectrons increases with increase in freqency of the light incident on the metal surface.

A

True

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B

False

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Solution

The correct option is A True
The kinetic energy of any single emitted electron increases linearly with frequency above some threshold value and is independent of the light intensity.

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Q. Statement- 1: The kinetic energy of photoelectrons increases with increase in frequency of incident light.

Statement- 2: The number of photoelectrons ejected increases with increase in intensity of light.

Q. Assertion :Kinetic energy of photoelectrons increases with increase in the frequency of incident radiation. Reason: The number of photoelectrons ejected increases with increase in intensity of incident radiation.

Q. When a light of frequency

v_{1}

is incident on a metal surface, the photoelectrons emitted have twice the kinetic energy as did the photoelectrons emitted when the same metal has irradiated with light of frequency

v_{2}

. What will be the value of threshold frequency?

Q. Assertion :The kinetic energy of the photoelectron ejected increases with increase in intensity of incident light. Reason: Increase in intensity of incident light increases the rate of emission.

Q. The work function of cesium metal is 2.14 eV. when light of frequency

6 \times 10^{14} H z

is incident on the metal surface, photoemission of electron occurs. find the (i) energy of incident photons (ii) maximum kinetic energy of photoelectrons.

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