Question

Question 25
What is the commercial unit of electrical energy? Represent it in terms of joules.

Answer 1

The commercial unit of electrical energy is Kilowatt hour.
1 kilowatt hour = 1000 watt $\times$ 1 hour
= 1000 watt $\times$ 3600 seconds
= 3.6 $\times {10}^6$ Joules