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In photoelectric effect, the photocurrent

1. depends both on intensity and frequency of the incident light.
2. does not depend on the frequency of incident light but depends on the intensity of the incident light.
3. decreases with increase in frequency of incident light.
4. increases with increase in frequency of incident light.

Correct answer: does not depend on the frequency of incident light but depends on the intensity of the incident light.

Solution

In the photoelectric effect, photocurrent is proportional to the number of photoelectrons emitted per second, which depends on the light intensity. Once the frequency is above threshold, changing frequency mainly changes the kinetic energy of electrons, not the current.

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