Energy consumed is calculated as Power (in kW) multiplied by Time (in hours). The total cost is the energy consumed multiplied by the rate per unit of energy (kWh).
An electric refrigerator rated 400 W operates 10 hours/day. What is the cost of the energy to operate it for 30 days at ₹ 3.00 per kWh?
Asked in UPSC CISF AC EXE 2020 · Topic: Electric Current (Electrical Power and Energy, Joule heating effect)
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