Physicshard · Past Paper
If the energy consumed by a 50W bulb in one month (30 days) is to be found, where it's used for 10 hours daily, how many units is it?
A15 units
B1.5 units
C150 units
D50 units
✓ Correct Answer: A — 15 units
Energy = Power * time = 0.05kW * 10h/day * 30 days = 15 kWh (units).
Share this question