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A photocell is illuminated by a small br...

A photocell is illuminated by a small bright source places `1` m away when the same source of light is placed `(1)/(2)` m away. The number of electron emitted by photocathode would be

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

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The correct Answer is:
D
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