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When a point source of light is at a di...

When a point source of light is at a distnace of 1 m from a photo cell, the cut off voltage is is found to be V. if the same source is placed at 3m distance from photo cell, the cut of voltage will be

A

V

B

`(V)/(2)`

C

`V/4`

D

`V/sqrt(2)`

Text Solution

Verified by Experts

The correct Answer is:
A
By changing distance of source, photoelectric current charges. But there is not change in stopping potential.
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