A thousand circuits has a fuse of 5a rating. Calculate the maximum number of bulbs of rating 60w-220v each which can be connected in the house hold circuit.
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Maximum current that can flow out from the mains 220V : 5 A
let there be N bulbs connected in parallel.
current through each bulb = P/V = 60/220 A
max N = 5 / (60/220) = 55/3 = 18 (truncate the decimals)
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