Question

The figure below shows the variation of
photocurrent with anode potential for a
photosensitive surface for three different
radiations. Letla, lo and I be the particle
intensities and Va, Vb and vc be the frequencies
of incident radiations for the curves a, b and c
respectively, then
a​

Answer 1

Answer:

ANSWER

From the graph, we note that the saturation current is same for curves b and c but different for curve a. Therefore, intensities of b and c will be equal but different from that of a i.e. I

a



=I

b

but I

b

=I

c

. As stopping potential is same for curves a and b, hence υ

a

=υ

b

. Thus answer (a) is correct.

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