The stopping potential of the photoelectrons | vedclass

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(B) The stopping potential $(V_0)$ is the minimum negative potential applied to the anode with respect to the cathode that stops even the most energet

Vedclass · Accepted Answer

Directly proportional to the frequency of incident light

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(B) The stopping potential $(V_0)$ is the minimum negative potential applied to the anode with respect to the cathode that stops even the most energetic photoelectrons from reaching the collector.According to Einstein's photoelectric equation: $K_{max} = h
u - \Phi_0$, where $K_{max} = eV_0$.Thus, $eV_0 = h
u - \Phi_0$, which implies $V_0 = \frac{h}{e}
u - \frac{\Phi_0}{e}$.From this equation, it is clear that the stopping potential $V_0$ is a linear function of the frequency of incident light ($
u$).Therefore, the stopping potential is directly proportional to the frequency of incident light (above the threshold frequency).

The stopping potential of the photoelectrons from a photocell is:

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