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A photocell is illuminated by a small br...

A photocell is illuminated by a small bright source placed 1 m away . When the same source of light is placed `(1//2)` m away , the photocathode would

A

decrease by a factor of 2

B

increase by a factor of 2

C

decrease by a factor of 4

D

increase by a factor of 4

Text Solution

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The correct Answer is:
D
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