051120 | Electrostatics

(a) Two point charges q₁ and q₂ are kept at a distance r₁₂ in air. Deduce the expression for the electrostatic potential energy of this system.

(b) If an external electric field (E) is applied on the system, write the expression for the total energy of this system.

[2020 | Delhi | Section - C | SET-1 SET-2, Q.33 Q.28]