The figure shows a plot of photo current versus anode potential for...

The figure shows a plot of photo current versus anode potential for a photo sensitive surface for three different radiations. Which one of the following is a correct statement ?

Options

ACurves (b) and (c) represent incident radiations same frequencies having same intensity.
BCurves (a) and (b) represent incident radiations of different frequencies and different intensities
CCurves (a) and (b) represent incident radiations of same frequencies but of different intensities
DCurves (b) and (c) represent incident radiations of different frequencies and different intensities

Correct answer

C. Curves (a) and (b) represent incident radiations of same frequencies but of different intensities

Step-by-step solution

As a and

\mathrm{b}

have same stopping potential and

\mathrm{c}

has greater stopping potential, then

\mathrm{v}_{\mathrm{c}}>\mathrm{v}_{\mathrm{a}}=\mathrm{v}_{\mathrm{b}}

\mathrm{b}

and

\mathrm{c}

have same saturation current and

a

has lesser value. So

\mathrm{I}_{\mathrm{a}} <

\mathrm{I}

_{\mathrm{b}}=

\mathrm{I}

_{\mathrm{c}}

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