Draw a plot showing the variation of photoelectric current with collector plate potential foe two different frequencies, $v_{1} > v_{2}$ , of incident radiation having the same intensity. In which case will the stopping potential be higher ? Justify your answer.

Question

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Answer 1

The variation of photoelectric current with collector potential for two different frequencies, $ν_{1} > ν_{2}$ is shown in figure.
The photoelectric equation in terms of stopping potential $V_{0}$ is given by , $e V_{0} = h ν - h ν_{o}$
So, $V_{0} \propto ν$
Thus, Stopping potential will be higher for $ν_{1}$ .

Answer 2

The variation of photoelectric current with collector potential for two different frequencies,

ν_{1} > ν_{2}

is shown in figure.

The photoelectric equation in terms of stopping potential

V_{0}

is given by ,

e V_{0} = h ν - h ν_{o}

So,

V_{0} \propto ν

Thus, Stopping potential will be higher for

ν_{1}

.