Power is the rate at which work is done or the rate at which energy is transferred or converted. Mathematically, power (P) is defined as:
Where:
- P is the power(J/s),
- W is the work done or energy transferred(J), and
- t is the time taken(s).
The SI unit of power is the watt (W), which is equal to one joule per second (J/s). This means that a power of one watt is equivalent to one joule of energy being transferred or converted per second.