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Q.

The figure shows the variation of photocurrent with anode potential for a photo-sensitive surface for three different radiations. Let Ia, Ib and Ic be the intensities and fa, fb and fc be the frequencies for the curves a, b and c respectively

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a

fa=fb and Ia≠Ib

b

fa=fc and Ia=Ic

c

and

d

and

answer is C.

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Detailed Solution

The stopping potential for curves a and b is same. Also saturation current is proportional to intensity
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