Electricity & Magnetism

Electric Potential

Electric potential energy per unit charge.

Variables

V
Electric potential
Potential at point
V
k
Coulomb constant
8.99×10⁹
N·m²/C²
Q
Source charge
Field-creating charge
C
r
Distance
From source
m

Derivation

V = U/q = -∫E·dr. For point charge: V = kQ/r.

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