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A circuit has a fuse of 5A. What is the maximum number of 100 watt (220 V) bulbs which can be safely used in the circuit? |
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Answer» Solution :Suppose x NUMBER of such bulbs can be used. Power of one bulb = 100 WATT Power of x bulbs (P) = 100x watts Potential difference (V) = 220 volts I = 5 ampere We KNOW `P=VI` `rArr 100x=220x5` `THEREFORE x=(220xx5)/(100)=11` bulbs |
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