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Following graph shown the variation of stopping potential corresponding to the frequency of incident radiation (v) for a given metal. The correct variation is shown in graph [ v₀= threshold frequency]

Options

  1. A(C)
  2. B(B)
  3. C(A)
  4. D(D)

Correct answer

C. (A)

Step-by-step solution

Concept: Stopping potential V is related to the maximum kinetic energy K_ of the photoelectrons, via Einstien's photo-electric effect relation: e V=K_ =h v-h v₀ Therefore, V= ( h e ) v- ( h e ) v₀ Therefore, V vs v is straighline with positive slope and at v=v₀ the stopping potential is zero.

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