Question

What is the S.I unit of energy .What is the commercial unit of energy.Write the relationship between the two.

Answer 1

S.I unit of energy is Joule (J).

Commercial unit of energy is Kilowatt Hour (KwH)

1 KwH = 3.6 x 10^6 J

1 Kw H = 1000 w x 3600 s = 3.6 x 10^{6} w s = 3.6 x 10^{6} J