Which of the following statement is correct?

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Photocurrent increases with intensity of light

Photocurrent is proportional to the applied voltage

Current in photocell increases with increasing frequency

Stopping potential increases with increase of intensity incident light

answer is A.

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Detailed Solution

The kinetic energy and therefore the speed of photoelectron emitted depends upon frequency of incident light while the number of photoelectrons emitted depends upon intensity of incident light. Hence, as the intensity of light increases, the photocurrent increases, but the photocurrent does not change with the change in frequency of the incident light.

In a photo-cell, the photocurrent has no relation with the applied voltage.

Stopping potential is the (negative) potential at which the current is just reduced to zero. It is independent of intensity of light but depends on the frequency of light similar to K.E.

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