It is equal to the amount of energy gained by an electron when accelerated through a potential difference
of one volt. It is unit of energy.
1 eV = 1.6 × 10-19 joule
When a charged particle moves under the influence of an electric field, then, Kinetic energy gained = Potential energy lost
ENERGY DENSITY
In electric field, energy stored per unit volume is called energy density. It is equal to
u = (1/2) e0 E2
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