alleryThe COMMERCIAL UNIT of electrical energy, used on electricity bills, is the:
AKilowatt-hour (kWh), equal to 3.6 × 10⁶ joules
BJoule (J), equal to a newton-metre exact
CCalorie (cal), equal to about 4.18 joules
DNewton-hour (Nh), equal to mass × time
Answer & Solution
Correct answer: A. Kilowatt-hour (kWh), equal to 3.6 × 10⁶ joules
The commercial unit is the kilowatt-hour (kWh).
1 kWh = 1000 W × 1 hour = 1000 × 3600 = 3.6 × 10⁶ J. Electricity bills calculate kWh × tariff.
A typical Indian home consumes 100-300 kWh/month.
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