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**Potential energy of a system of two charges in an external field:**

The potential energy of a system in an external field is the total work done in assembling the configuration in presence of the external field. It can be calculated easily in two steps:

**Potential energy of the system = U****Potential energy of each individual charge under the external field=****$q_{1}V(r_{1})+q_{2}V(r_{2})+...+q_{n}V(r_{n})$**

P.E. of the System (U)+Sum of (Potential Energy of Each Charge in presence of External Field)

U can be calculated for any number charges using the below formulae:

This video will further explain the method of calculating P.E. of a system of charges in an external field.

POTENTIAL ENERGY IN AN EXTERNAL FIELD

4 mins