Electrical power and energy

What is Electrical power and energy?

Electrical power is the energy transferred per unit time in a circuit, P = IV, and the energy transferred is E = IVt; a kilowatt-hour is the energy transferred by a 1 kW device running for 1 hour, equal to 3.6 million joules.

This definition is part of the Electricity and Magnetism chapter in Cambridge O Level Physics.

Concepts related to Electrical power and energy

• rate of energy transfer
• fuse rating
• electricity meter
• transmission losses