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11. Dual nature of radiation and matter — Physics STD 12 Science — Question

CBSE BoardEnglish MediumSTD 12 SciencePhysics11. Dual nature of radiation and matter1 Mark
MCQ
Two identical capacitors are arranged as shown. Work function of plate $1$ is $\phi  \ eV$ .The $emf$ of battery is $\frac{\phi }{e}$ . If energy of incident photon is $hv$ then maximum kinetic energy of $e^-$ reaching plate $2$ is 
  • ✓
    $hv - \phi /2$
  • B
    $hv- \phi$
  • C
    $hv - 2\phi $
  • D
    $hv$
✓

Answer

Correct option: A.
$hv - \phi /2$
a

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