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A given length of a wire is doubled of i...

A given length of a wire is doubled of itself and this process is repeated once again. By what factor does the reeutance of the wire changes ?

Text Solution

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Length `(1)/(4)` and area 4 times
`R=rho(l)/(A) =rho(l)/(4xx4A)=(R)/(16) ` (decreases)
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