Question

When the amplitude of the light wave , incident on a photometal sheet is increased. then

• A. the photo electric current increases
• B. the photoelectric current remains unchanged
• C. the stopping potential increases
• D. the stopping potential decreases

Answer 1

Answer: (A)

Intensity $\propto$ (amplitude) ${}^2$
So, as amplitude increase intensity is increased. And current is directly proportion to the intensity.
So, current increases as intensity increase.
Stopping potential is independent of the intensity of the incident light.