two lamps one rated 100w at 220v and the other 60 W at 220v are connected in parallel to electric mains supply. Find the current drawn by the two lamps from the line if the supply voltage is 220v
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Explanation:
Both the bulbs are connected in parallel. Therefore, potential difference across each of them will be 220 V, because no division of voltage occurs in a parallel circuit.
Current drawn by the bulb of rating 100 W is given by,Power = Voltage x Current
Current = Power/Voltage = 60/220 A
Hence, current drawn from the line = 100/220 + 60/220 = 0.727 A
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