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JIPMER2006PhysicsDual Nature of Matter

The light rays having photons of energy 1.8 eV are falling on a metal surface having a work function 1 2 eV . What is the stopping potential to be applied to stop the emitting electrons ?

Options

  1. A3 eV
  2. B1.2 eV
  3. C0.6 eV
  4. D1.4 eV

Correct answer

C. 0.6 eV

Step-by-step solution

Maximum kinetic energy of photoelectron aligned & ( KE )_ =E- & =1.8-1.2 & =0.6 eV & i.e., e V₀=( KE )_ & or e V₀=0.6 eV & aligned Stopping potential V₀=0.6 eV .

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