Question
Sun August 17, 2008 By:

please help electricity??????????????????

Expert Reply
Mon August 18, 2008

the resistance will become 16 times ,hence new resistance will be 32ohms,

volume of the wire will remain constant therefore

 l A = l' A'

A/A' = l' / l = 4 , where A is the original area of crossecition, A' new area of crossesection,l is original lenght, l' is new lenght.

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