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  3. A circuit has a fuse of 5A. What is the maximum number of 100 watt (220V) bulbs that can be safely used in the circuit

. A circuit has a fuse of 5A. What is the maximum number of 100 watt (220V) bulbs that can be safely used in the circuit

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Ans: Suppose x number of such bulbs can be used

Power of one bulb = 100 watt

Power of x bulbs (P) = 100 X x watts

Potential difference (V) = 220 volts

I = 5 ampere

We know P = VI

100 X x = 220 X 5

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