Question

Which of the following statements are correct?
A. Photoelectric current depends on the intensity of light.
B. The stopping potential is directly related to the maximum kinetic energy of electrons emitted, which is dependent on the intensity of incident radiation.
C. Photoelectric emission from a metal surface occurs due to absorption of a photon by an electron.
D. Photoelectric effect follows the law of conservation of energy.

• A. A, B, and C only
• B. B, C, and D only
• C. A, C, and D only
• D. A, B, and D only

Hint:

Intensity affects the number of emitted electrons in the photoelectric effect, but not their kinetic energy, which is determined by the frequency of the incident light.

Answer 1

The Correct Option is C

A - The photoelectric current depends on the intensity of the incident radiation because higher intensity means more photons striking the surface, resulting in more electrons being ejected.
B - The stopping potential is indeed related to the maximum kinetic energy of emitted electrons, but it is independent of intensity, depending only on the frequency of the incident radiation.
C - Photoelectric emission happens due to the absorption of a photon by an electron, which is correct.
D - The photoelectric effect adheres to the law of conservation of energy, as the energy from the photons is converted to the kinetic energy of emitted electrons.