Question

The commercial unit of electrical energy is ___________.

Answer 1

1. The motion of charged particles constitutes an electric current.
2. Electrical energy is derived from the kinetic or potential energy of the charged particles.
3. It is the energy derived from the motion of electrons from one point to another.
4. The SI unit of electrical energy is the joule.
5. However, one joule is a very small unit to calculate daily consumption.
6. So, a larger unit Kilo Watt-hour (KWh) is used as the commercial unit of electricity.
7. The electricity bills are calculated using KWh as the unit.

Hence, the commercial unit of electrical energy is KWh.