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The threshold frequency for a certain me...

The threshold frequency for a certain metal is `3.3xx10^(14)` Hz. If light of frequency `8.2xx10^(14)` Hz is incident on the metal, predict the cut-off voltage for the photoelectric emission.

A

0.2

B

20

C

0.02

D

2

Text Solution

Verified by Experts

The correct Answer is:
D
`eV_(s)= h(v-v_(0)), V_(S)= (h(v-v_(0)))/(e )= (6.63 xx 10^(-34) (8.2 - 3.3) xx 10^(14))/(1.6 xx 10^(-19)), V_(s)= 2V`
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