# Electrical Circuit : Power and Energy

**Energy**: Energy is the capacity to do work. It is measured in joules (J).

**Power**: Power is the time rate of expending or absorbing energy, measured in watts (W).

P = VI

the law of conservation of energy must be obeyed in any electric circuit. For this reason, the algebraic sum of power in a circuit, at any instant of time, must be zero

## No comments