A point source of light is used in a photoelectric effect. If the source is moved further from the emitting metal, the stopping potential

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Will increase

Will decrease

Will remain constant

May increase or decrease

answer is C.

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Detailed Solution

When the point source is moved further from the emitting metal, the intensity of light decreases resulting in less number of photons reaching to metal.

Stopping potential depends only on the frequency of incident radiation and work function of metal.

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