Chapter-2|Electrostatic Potential and Capacitance| NCERT 12th Physics:
Potential Energy in an External Field:
Potential energy in an external field of a system are as under
Potential Energy of a Single Charge in External Field:
If V(r) is the potential at a point due to external field E, Then potential energy of a single charge q at a point with position vector r in an external field
Potential Energy of a System of Two Charges in an External Field:
If V₁ and V₂ be the electric potential of the field E at the point where q₁ and q₂ are located, then potential energy of the two charges in the field E is