RE-NEET2026Physics-Modern Physics
RE-NEET 2026 Physics Photoelectric Effect MCQ Question
Type: MCQ-conceptual-Medium-Class 12
A beam of light falls on a metal surface such that photo-electrons are generated. If power of the light source starts to decrease linearly with time t, then variation of the photocurrent I and magnitude of the stopping potential |V| with time is best represented by :
Correct Answer
Option B
Detailed Explanation
As the power of the light source decreases, the number of photo-electrons emitted decreases, reducing the photocurrent I. The stopping potential |V| remains constant as it depends on the frequency of light, not intensity.
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