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Electromotive force depends upon intensity of light falling, it does not depend on frequency or barrier voltage.

1. (a) Electromotive force depends upon intensity of light falling, it does not depend on frequency or barrier voltage.
2. (b) Electromotive force depends upon frequency of light falling.
3. (c) Electromotive force depends upon barrier voltage.
4. (d) None of the above.

Correct answer: (b) Electromotive force depends upon frequency of light falling.

Solution

Electromotive force in the photoelectric effect depends on the frequency of the incident light, as it determines the energy of the emitted photoelectrons. It does not depend on the intensity of light or the barrier voltage.

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