Electrostatic Potential
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Work done in moving an object from one point to another depends only on the initial and final positions and is independent of the path taken.
Electrostatic Potential
Electrostatic potential at a point is the work done by the external force in bringing a charge from infinity to that point.
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The quantity of potential difference is more physically significant than actual value of potential energy.
W RP = ΔU = U P- U R( U P + α)-( U R + α) = U P- U R, the arbitrary α has no effect on potential energy difference If the initial point is at infinity, W ∞P = ΔU = U P- U ∞ U ∞ is usually considered as 0, so W ∞P = ΔU = U P