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The anode voltage of photocell is kept f...

The anode voltage of photocell is kept fixed. The wavelength of incident light on cathode is gradually changed. The plate current I of photocell varies as :

A

B

C

D

Text Solution

Verified by Experts

The correct Answer is:
C
As `lambda` is increased, there will be a value of `lambda` above which photo electrons will cease to come out, so photo current will become zero finally, hence (c) is correct graph.
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