Cut-off potential : The minimum negative potential required to just make the photo electric current of the plate is zero, defined as stopping potential.
Kmax = eV₀ {eV₀ = stopping potential}
Electron volt : One electron volt is the kinetic energy gained by an electron when it is accelerated through a potential difference of one volt.
1eV
= qV
1eV = 1.602 x 10-19 x 1[1eV = 1.602 x 10-19 ]
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