Question

In photoelectric emission, the intensity of incident light is reduced then stopping potential

• A. may increase or decrease.
• B. remains same.
• C. increases.
• D. decreases.

Hint:

In the photoelectric effect, the stopping potential depends on the frequency of the incident light, not its intensity.

Answer 1

The Correct Option is B

Step 1: Understanding photoelectric emission.
In the photoelectric effect, the stopping potential is the minimum voltage needed to stop the most energetic photoelectrons emitted by a material when illuminated by light. The stopping potential depends on the frequency of the incident light and not on its intensity. Step 2: Effect of intensity.
The intensity of the incident light affects the number of photoelectrons emitted but does not change the maximum kinetic energy of the emitted electrons. Since the stopping potential depends on the kinetic energy of the electrons (which is related to frequency), it remains unaffected by changes in light intensity. Step 3: Conclusion.
Thus, the correct answer is (B), the stopping potential remains the same.