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In an experiment with photoelectric effect, the stopping potential. (1) increases with increase in the wavelength of the incident light (2) increases with increase in the intensity of the incident light (3) is (1/e) times the maximum kinetic energy of the emitted photoelectrons (4) decreases with increase in the intensity of the incident light

1. (1) and (2) only
2. (2) and (3) only
3. (3) only
4. (1), (2) and (4) only

Correct answer: (3) only

Solution

The stopping potential is directly related to the maximum kinetic energy of the emitted photoelectrons, which is determined by the energy of the incident photons. According to the photoelectric effect, the stopping potential is equal to (1/e) times the maximum kinetic energy, making option (3) the correct choice.

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