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NEET2022PhysicsDual Nature of MatterActual

The light rays having photons of energy 4.2 eV are falling on a metal surface having a work function of 2.2 eV . The stopping potential of the surface is:

Options

  1. A2 eV
  2. B2 ~V
  3. C1.1 ~V
  4. D6.4 ~V

Correct answer

B. 2 ~V

Step-by-step solution

By Einstein photoelectric equation, we have; aligned K.E. & =h v- e ~V ₀ & =4.2 eV -2.2 eV e ~V ₀ & =2 eV =2 volt aligned

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