A peice of wire of resistence 20 . is drawn out to increase its length to twice as original length . Calculate its resistance now.
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it residence would become 40
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When length of wire get twice then, it's area become 1/2 of it's original.
As we know R=pL/A
IF A reduces by half then resistance will increases and becomes twice as 40 ohm.
As we know R=pL/A
IF A reduces by half then resistance will increases and becomes twice as 40 ohm.
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