1.

A bulb is marked 220 V and 40 W. Calculate the current flowing through the bulb and its resistance.

Answer»

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Solution :GIVEN : Voltage = V = 220 V, Power = P = 40 W.
`P=VIrArrI=P/V=40/220=0.182A`
RESISTANCE = `R=V/I=220/0.182=1210Omega`


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