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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
2.3 V
B
1.8 V
C
1.3 V
D
0.5 V
Detailed Solution
The stopping potential $V_0$ is the retarding potential that just stops the most energetic photoelectrons.
$eV_0 = KE_{max}$
$eV_0 = 0.5$ eV
$V_0 = 0.5$ V
The work function (1.8 eV) is not needed, because the maximum kinetic energy is given directly.
$eV_0 = KE_{max}$
$eV_0 = 0.5$ eV
$V_0 = 0.5$ V
The work function (1.8 eV) is not needed, because the maximum kinetic energy is given directly.