1 kilowatt-hour (the commercial unit of electrical energy) equals:
A3.6 × 10³ J
B3.6 × 10⁵ J
C3.6 × 10⁶ J
D3.6 × 10⁹ J
Answer & Solution
Correct answer: C. 3.6 × 10⁶ J
1 kWh = 1000 W × 3600 s = 3.6 × 10⁶ J.
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