If you used 400 W of power for 30 h, you have used
A. 1.3 kWh
B. 13.3 kWh
C. 1.2 kWh
D. 12 kWh
Answer: Option D
This Question Belongs to Electrical Engineering >> Energy And Power
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Energy = power * time = 0.4 * 30 = 12kwh