In photoelectric emission process from a metal of work function 1.8 eV, the kinetic energy of most energetic electrons is 0.5 eV. The corresponding stopping potential is

Question

In photoelectric emission process from a metal of work function 1.8 eV, the kinetic energy of most energetic electrons is 0.5 eV. The corresponding stopping potential is (A) 1.8V (B) 1.3V (C) 0.5 V (D) 2.3 V

Tardigrade Admin · Accepted Answer

The stopping potential Vs is related to the maximum kinetic energy of the emitted electrons K max through the relation K max =e Vs 0.5 eV =e Vs or Vs=0.5 V

Q. In photoelectric emission process from a metal of work function $1.8 e V$ , the kinetic energy of most energetic electrons is $0.5 e V$ . The corresponding stopping potential is

1.8V

1.3V

0.5 V

2.3 V

The stopping potential $V_{s}$ is related to the maximum kinetic energy of the emitted electrons $K_{m a x}$ through the relation
$K_{m a x} = e V_{s}$
$0.5 e V = e V_{s}$
or $V_{s} = 0.5 V$

Q. In photoelectric emission process from a metal of work function 1.8eV, the kinetic energy of most energetic electrons is 0.5eV. The corresponding stopping potential is