Physicsmedium · Past Paper
If the cost of electricity is Rs. 10 per unit, how much does it cost to run a 2kW heater for 5 hours?
ARs. 10
BRs. 50
CRs. 100
DRs. 200
✓ Correct Answer: C — Rs. 100
Energy = 2kW * 5h = 10 units. Cost = 10 units * Rs. 10 = Rs. 100.
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