Question

Derive the expression of electrical energy and electrical power of a device? What are their units?​

Answer 1

The work done to move a unit charge from one point to another in an electric field is known as electrical energy. Its S. I. unit is Joule(J). The rate of work done to bring a test charge from infinity to a point in an electric field is known as electric power. Its S. I. unit is Watt(W).