Question

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.

Answer 1

The variation of photoelectric current with collector potential for two different frequencies, ${\nu }_1>{\nu }_2$ is shown in figure.

The photoelectric equation in terms of stopping potential $V_0$ is given by , $e{V}_0=h\nu -h{\nu }_o$

So, $V_0\propto \nu$

Thus, Stopping potential will be higher for ${\nu }_1$.