we have a copper wire of resistance r this wire is cooled so that its length is doubled( temperature remains constant). Find The new resistance of the wire in the terms of its resistance
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resistance = 4r is new resistance
when the wire is cooled then it's area also changed, so only volume is constant.
Now, R directly proportional to length and 1/area
when the wire is cooled then it's area also changed, so only volume is constant.
Now, R directly proportional to length and 1/area
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harsh3374chauhan:
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by mistake it was written
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I have given unit as Amgstrom , as 10^-10 is a 1 angstrom
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