What is the commercial unit of electrical energy? Represent it in terms of joules.
The commercial unit of electrical energy is kilowatt hour.
1 kWh = 11000 W h
1000 W h= (1000 Joule/second) ×hour
= 1000 x J / S x 60 x 60 s
= 3600 x 1000 J
= 3.6 x 106 J
