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MHT CET202615 April 2026Evening ShiftPhysicsDual Nature of MatterActual

In photoelectric effect experiment, if the frequency of incident radiation ( v ) is increased, keeping all other factors constant, the stopping potential, ( v > v₀ ) ( v₀ = threshold frequency)

Options

  1. Adecreases
  2. Bremains the same
  3. Cincreases
  4. Dbecomes zero

Correct answer

C. increases

Step-by-step solution

According to Einstein's photoelectric equation, the maximum kinetic energy of emitted photoelectrons is given by: K_ = h v - where h is Planck's constant, v is the frequency of incident radiation, and is the work function of the material. The stopping potential V₀ is related to the maximum kinetic energy by: e V₀ = K_ Substituting this into the photoelectric equation gives: e V₀ = h v - V₀ = h e v - e From this linear relationship, it is evident that the stopping potential V₀ increases as the frequency of incident

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