What is electrostatic potential energy of a system of two point charges? Deduce an expression for it.
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Electrostatic potential energy : electrostatic potential energy of a system of charges is defined as the wordone to put charge constituting the system at their respective locations after having been removed to infinity .
As, potential energy of system of n charges q₁ , q₂ , q₃, ..... qn is given by
U = 1/4πε₀ [q₁q₂/r₁₂ + q₂q₃/r₂₃ + q₃q₄/r₃₄ + .....qₙq₁/rₙ₁]
Now, electrostatic potential energy of a system of two charges
U = 1/4πε₀ [q₁q₂/r₁₂ ]
As, potential energy of system of n charges q₁ , q₂ , q₃, ..... qn is given by
U = 1/4πε₀ [q₁q₂/r₁₂ + q₂q₃/r₂₃ + q₃q₄/r₃₄ + .....qₙq₁/rₙ₁]
Now, electrostatic potential energy of a system of two charges
U = 1/4πε₀ [q₁q₂/r₁₂ ]
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