Physics Work & Energy SZABMU 2022
PMDC Verified Question 44 of 108
The unit of power in British engineering system is:
A
Horse power
B
Watt
C
\( \text{Js}^{-1} \)
D
Js
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option A: Horse power
Concept:

Different systems of measurement use different standard units for physical quantities. Power is the rate of doing work.

Formula:

$$ 1 \text{ hp} = 746 \text{ Watts} $$

Solution:

  • In the SI system, the unit of power is the Watt (\( \text{Js}^{-1} \)).


  • In the British Imperial (engineering) system, power is traditionally measured in Horsepower (hp) or foot-pounds per second.


Why other options are incorrect:

Watt and \( \text{Js}^{-1} \) are SI units. Js is a unit of action or angular momentum, not power.

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