Physicsmedium · Past Paper
If four 100W bulbs are used for 5 hours every day, how many units of electricity are consumed in 1 day?
A2 units
B20 units
C0.5 units
D10 units
✓ Correct Answer: A — 2 units
Total Power = 4 * 100W = 400W = 0.4kW. Energy = 0.4kW * 5h = 2 kWh (2 units).
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