Physicshard · Past Paper
How many 60W bulbs can be safely used on a 220V circuit with a 5A fuse?
A10 bulbs
B18 bulbs
C25 bulbs
D5 bulbs
✓ Correct Answer: B — 18 bulbs
Total max power = V * I = 220 * 5 = 1100W. Number of bulbs = 1100 / 60 ≈ 18.33. Max is 18.
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