Question

In photoelectric effect, keeping the frequency of incident radiation and accelerating potential fixed, if the intensity of incident light is increased,

• A. the photoelectric current increases.
• B. the kinetic energy of emitted photoelectrons increases.
• C. photoelectric current decreases.
• D. kinetic energy of emitted photoelectrons decreases.

Hint:

Stopping potential rises linearly with the frequency above threshold.

Answer 1

The Correct Option is A

Step 1: Energy picture:
A photon of larger frequency has more energy. Emitted electrons therefore carry more maximum kinetic energy.

Step 2: Result:
The retarding potential needed to stop them must be larger, so $V_0$ increases (C).

Final Answer:
Increases. \[ \boxed{\text{(C)}} \]