A lamp rated hundred watt at 2:20 volt is connected to the main electric supply what amount of current is drawn from the supply if the voltages to 20 volt what is its resistance
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P=100W
V=220v
i.P=VI
I=P/V
I=100/220
I=0.4A
ii.P=V^2/R
R=V^2/P
R=220*220/100
R=484ohm
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V=220v
i.P=VI
I=P/V
I=100/220
I=0.4A
ii.P=V^2/R
R=V^2/P
R=220*220/100
R=484ohm
mark as brainlist I hope it help u !!!!! follow me guys
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