Question

If the frequency of incident radiation is increased above threshold frequency, keeping intensity and potential constant then the photoelectric current ______.

Options

• decreases

• becomes zero

• remains same

• increases

Answer 1

If the frequency of incident radiation is increased above threshold frequency, keeping intensity and potential constant then the photoelectric current remains same.

Explanation:

In the photoelectric effect, photoelectric current depends on the intensity of incident radiation, not on its frequency (provided frequency is above threshold). Increasing frequency only increases the kinetic energy of emitted electrons, while the number of electrons emitted per second (current) remains unchanged.