Light striking a metal surface causes electrons to be emitted from the metal via

Question

Light striking a metal surface causes electrons to be emitted from the metal via the photoelectric effect.

In another experiment, the intensity of the incident light and the temperature of the metal are held constant. Assuming that the initial light incident on the metal surface causes electrons to be ejected from the metal, what happens if the frequency of the incident light is increased?
Check all that apply.
The work function of the metal increases.
The number of electrons emitted from the metal per second increases.
The maximum speed of the emitted electrons increases.
The stopping potential increases.

Explanation / Answer

In photo electric effect when the intensity of light and the temperature of the metal are held constant. If we increases the frequency of the incident light For a given metal this work function remains constant for a particular frequency the work fucntion W = hf0 here fo is the minimum frequency below which no photoelectrons are emitted. By increasing frequency the work function is not increase it will remain constant for a particlaur frequency. The number of eletcrons emitted from the metal per second is not depends upon the frequency From Einstein relation          hf = W0 + eV0 so the kinetic energy of emitted photoelectrons increases with the increase of the frequency. The stopping potential also depends upon the frequency By increasing the frequency stopping potential also increases.

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