a laptop adaptor was connected to a 220 volt line it through 3.3 ampere current. calculate the resistance of the laptop and thereby answer what will be the current drawn if it is connected to a 110 volt supply line
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r=v/I=220/3.3=2200/33ohm
if it is connected to a 110v supply line
then I = v/r=2200/33×110=20/33A
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