question_answer

Draw a plot showing the variation of photoelectric current with collector plate potential for 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:

                The plot is shown in Fig.                 For \[{{v}_{1}}>{{v}_{2}},\]          \[{{V}_{01}}>{{V}_{02}}\]                 The stopping potential increases linearly with the increase in frequency of incident radiation. Larger the frequency of incident photon, larger is the kinetic energy of the ejected photoelectron and higher is the value of retarding potential to stop the emission of this electron.