Question

If $1J$ of work is done in $1s$, the power spent is equal to:

• A. $1Js$
• B. $1MW$
• C. $1W$
• D. None of these

Answer 1

Answer: (C)

$1W$

If $1J$ of work is done in $1s$, the power spent is said to be $1W$.

$Power=\frac{work}{time}$

$\Rightarrow 1W=\frac{1J}{1s}$

$\Rightarrow 1W=1J{s}^{-1}$