Question

Define power. What is its SI unit?

Answer 1

1. Power is defined as the rate of doing work.
2. It is expressed as power = work done/time taken
3. The unit of power is joule/second. In symbol, it is represented as $\left(\raisebox{1ex}{$J$}\!\left/ \!\raisebox{-1ex}{$s$}\right.\right)$.
4. The SI unit of power is watt and its symbol is $\left(W\right)$.
5. 1 watt $\left(W\right)$ = 1 joule/second $\left(\raisebox{1ex}{$J$}\!\left/ \!\raisebox{-1ex}{$s$}\right.\right)$