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According to the photoelectric effect, the speed of electrons emitted depends upon the frequency of incident light while the number of photoelectrons emitted depends upon the intensity of incident light. Which statement is correct?

1. As the intensity of light increases, the photocurrent increases.
2. In a photo-cell, the photocurrent has no relation with the applied voltage.
3. Stopping potential is independent of the intensity of light but depends on the frequency of light similar to K.E.
4. All of the above.

Correct answer: All of the above.

Solution

All the given statements are correct. (A) relates intensity to photocurrent, (B) highlights that photocurrent depends on light intensity and not applied voltage, and (C) correctly states the stopping potential's dependence on frequency and independence from intensity.

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