What is the SI unit of power?

The SI unit of power is indeed watts (W). Power is defined as the rate at which work is done or energy is transferred over time. In the context of the International System of Units (SI), one watt is equivalent to one joule of energy transferred or converted per second. This means that if an electric device uses one joule of energy in one second, it operates at a power of one watt.

Understanding power in terms of its relationship with work and time is crucial. It allows us to determine how quickly energy is used or produced in systems ranging from household appliances to large industrial machines. Accordingly, the other units mentioned are associated with different physical quantities: volts represent electric potential difference, amps measure electric current, and joules relate to energy. Thus, watts stands out as the singular unit that quantifies power in the SI unit system.