Question

Unit of electric power may also be expressed as 

(a) volt ampere 

(b) kilowatt hour

(c) watt-second 

(d) joule second

Answer 1

The answer is (b) kilowatt hour

• Volt-ampere (VA) is the unit used for the apparent power in an electrical circuit. 
• A watt second (also watt-second, symbol W s or W. s) is a derived unit of energy equivalent to the joule. 
• The joule-second is the unit used for Planck's constant.