The main power supply of a house I through a 5 A fuse. How many 100 W bulbs can be used in this house at the correct voltage.
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Here potential difference of the bulb should also be mentioned . Usually , it remains 220V . So let it be 220V. Now,the current in each bulb is I = P/V = 100/220 = 5/11 A Through %A fuse ' maxim current available is 5A. No. of bulbs = max. current/current through each bulb = 5/5/11 = 11
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