Question

(1) What is the stopping potential when a metal, of photoelectric
work function 4.13 eV, is irradiated with UV photons of energy
6.3 eV?​

Answer 1

6.3 volt is the answer

Answer 2

Answer:

-2.17 volts!

Explanation:

The stopping potential is equal to the negative of the kinetic energy:

hν = Ф + K.E

where - ∅ = Work function or the minimum energy required to eject an electron out from an atom at the surface of metal.

here hν = 6.30V

and Ф = 4.13V

hence K.E = 2.17 = -(stopping potential)

thus, stopping potential = -2.17V