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Two non-conduction hollow uniformly char...

Two non-conduction hollow uniformly charged spheres of radil `R_(1)` and `R_(2)` with charge `Q_(1)` and `Q_(2)` respectively are places at a distance r. Find out total energy of the system.

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`U_("total") = U_("self") + U_("Interaction")`
`= (Q_(1)^(2))/(8pi epsilon_(0)R_(1)) + (Q_(2)^(2))/(8pi epsilon_(0)R_(2)) + (Q_(1)Q_(2))/(4pi epsilon_(0) r)`
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