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Question

What is the work function of the metal?
$6.25 e V$
$6.86 e V$
$3.6 e V$
$5.4 e V$

A

3.6 e V

B

6.25 e V

C

6.86 e V

D

5.4 e V

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Solution

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In the first case:
Using photoelectric equation, we have
$\Rightarrow 13.6 = h ν - W$
where, W is the work function.

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