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Manipal MET2017PhysicsDual Nature of Matter

The photoelectric cut-off voltage in an experiment was found to be 1.5 V . The work function for the material used in the experiment was 4.2 eV . The maximum kinetic energy of the photoelectrons that emitted was

Options

  1. A1.5 eV
  2. B2.7 eV
  3. C4.2 eV
  4. D5.7 eV

Correct answer

A. 1.5 eV

Step-by-step solution

If stopping potential is V₀ , then maximum kinetic energy of photoelectrons is given by E_k=e V Given, V=1.5 volt E_k=1.5 eV

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