In the 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 the 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) 0.5V (D) 2.3V

Tardigrade Admin · Accepted Answer

The stopping potential Vs is related to the maximum kinetic energy of the emitted electron Kmax through the relation Km a x=eVs 0.5eV=eVs or Vs=0.5V

Q. In the 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

$1.8 V$

$1.3 V$

$0.5 V$

$2.3 V$

The stopping potential V_s is related to the maximum kinetic energy of the emitted electron K_max through the relation
$K_{ma x} = e V_{s}$
$0.5 e V = e V_{s}$ or $V_{s} = 0.5 V$

Q. In the 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

1.8V

1.3V

0.5V

2.3V