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