1 kWh is equal to (1) 3.6*10^6 MJ (2) 3.6*10^5 MJ (3) 3.6*10^2 MJ (4) 3.6 MJ

Answer: (4)

The commercial unit of electrical energy is a kilowatt-hour (kWh). The energy generated by a kilowatt power source in 1 hour is 1 kWh.

1kWh = 1kW × 1hour

1kWh = 1000 × 60 × 60

1kWh = 3.6 × 106 J

1kWh = 3.6 MJ

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