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Photon with energy 5 ev are incident on ...

Photon with energy 5 ev are incident on a cathode C, on a photoelectric is 2 eV. When photons of energy 6 eV are incident C, no photoelectrons will reach the anode. A if the stoppoing potential of A relative to C is

A

`3 V`

B

`-3 V`

C

`-1 V`

D

`4 V`

Text Solution

Verified by Experts

The correct Answer is:
B
`phi=5eV-2eV=3eV`
`implies -V_(S)=(6eV-3eV)/(e) implies V_(S)= -3V`
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