Question

Which of the following is not a measure of energy?

• A. $J{s}^{-1}$
• B. Ws
• C. kWh
• D. erg

Answer 1

The correct option is A

$J{s}^{-1}$

Joules is the S.I unit of Energy. $J{s}^{-1}$ is measure of power as $Power=\frac{Energy}{Time}$. All the other units can be converted to Joules.