Physicsmedium · Past Paper
An electric bulb of 60 W is used for 5 hours a day. The energy consumed in 30 days is:
A9 kWh
B18 kWh
C90 kWh
D1.8 kWh
✓ Correct Answer: A — 9 kWh
Energy per day = 60W * 5h = 300 Wh. Energy for 30 days = 300 * 30 = 9000 Wh = 9 kWh.
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