Which expression correctly represents the commercial unit of electrical energy in terms of joules?

Question

Which expression correctly represents the commercial unit of electrical energy in terms of joules? — Exam MCQ

rrbjepyq.in · Accepted Answer

C. 1 kilowatt hour = 3.6 × 10 joules — The commercial unit is 1 kWh. Since 1 kW = 1000 W and 1 h = 3600 s, 1 kWh = 3.6×10⁶ J.

rrbjepyq.in · Answer

A. 1 kilowatt hour = 1.6 × 10 joules

rrbjepyq.in · Answer

B. 1 kilowatt hour = 1000 joules

rrbjepyq.in · Answer

D. 1 kilowatt hour = 360 joules