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If the frequency of incident light on a ...

If the frequency of incident light on a certain metal is `8.2xx10^(14)Hz`, having threshold frequency `3.3xx10^(14)Hz`, then cut off potential is :

A

3. 0 V

B

4.0 V

C

5.1 V

D

None of these.

Text Solution

Verified by Experts

The correct Answer is:
D
`(1)/(2) mv^(2)=h(v-v_(0))`
At V= cut off potential,
`eV=(1)/(2) mv^(2)`
`:.V=(h(v-v_(0)))/(e)=2` volt
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