Question

Photons with energy `5 eV` are incident on a cathode `C` in a photoelectric cell . The maximum energy of emitted photoelectrons is `2 eV`. When photons of energy `6 eV` are incident on `C` , no photoelectrons will reach the anode `A` , if the stopping potential of `A` relative to `C` is
A. `+3V`
B. `+4V`
C. `-1V`
D. `-3V`

Answer 1

Correct Answer - D
`W=5-2=3eV` ltBrgt `KE_(max)=6-3=3eV`
`V_(0)=3` volt