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Stopping Potential

In photoelect...

Question

In photoelectric emission process from a metal of work function $1.8 e V$ , the kinetic energy of most energetic electrons is $0.5 e V$ . The corresponding stopping potential is :

A

1.3 V

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B

0.5 V

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C

2.3 V

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D

1.8 V

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Solution

The correct option is B $0.5 V$
Stopping potential $=$ Maximum KE
$e V = {K E}_{m a x} = 0.5 V$

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