Question

HELLO GUYS

The SI unit of electric power may be expressed as -
(*) voltmeter ampere
(*) kilowatt hour
(*) watt second
(*) joule second​

Answer 1

Answer:

kilowatt hour

Explanation:

A kilowatt-hour is 1,000 watts used for one hour.

Why it is not joule second?

Here we are talking about joule second (joule multiplied by the no.of seconds) used for Planck's constant and not about joule/second (joule per second).