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Question: Answered & Verified by Expert
In photoelectric emission process from a metal of work function $1.8 \mathrm{eV}$, the kinetic energy of most energetic electrons is $0.5 \mathrm{eV}$. The corresponding stopping potential is
PhysicsDual Nature of MatterVITEEEVITEEE 2012
Options:
  • A $1.3 \mathrm{~V}$
  • B $0.5 \mathrm{~V}$
  • C $2.3 \mathrm{~V}$
  • D $1.8 \mathrm{~V}$
Solution:
1284 Upvotes Verified Answer
The correct answer is: $0.5 \mathrm{~V}$
Stopping potential $=$ Maximum $\mathrm{KE}$
$$
\mathrm{eV}=\mathrm{KE}_{\max }
$$

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