Question

Which of the following units is/are used to describe power?

• A. watt
• B. pascal
• C. horse-power
• D. $J{s}^{-1}$

Answer 1

Answer: (A), (C), (D)

The correct options are
A

watt

C

horse-power

D

$J{s}^{-1}$

Power is defined as work done per unit time.

$\text{Power}=\frac{\text{Work done}}{\text{Time}}$

Its S.I unit is watt(W)

1 watt = $1J{s}^{-1}$

It can also be measured in horse-power(H.P)

1 H.P = 746 watt.

Hence, watt, $J{s}^{-1}$ and horse-power are units that describe power.

Also, pascal is not a unit of power. It is the SI unit of pressure