a given length of a wire is doubled on itself and this process is repeated once again .By what factor does the resistance of the wire change?
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the resistance of the wire decreases as the length of it is decreased.
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Answer:
The length of wire is doubled on itself and so the area get reduced to half.
The resultant resitance will be 4 times.
The process is repeated and therefore the resistance will increase by 4 times. The total resistance will be increased to 16 times.
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