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A point source of light is used in a pho...

A point source of light is used in a photoelectric effect. If the source is removed farther from the emitted metal, the stopping potential

A

will increase

B

will decrease

C

will remain constant

D

will either increase or decrease

Text Solution

Verified by Experts

The correct Answer is:
C
With distance intensity will fall as `1/r_(2)`.When source moves away from the metal intensity of light falling on the metal decreases but frequency remains the same.As stopping potential is independent of intensity and depends on frequency, stopping potentail remains the same.
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