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September 30, 2014

Homework Help: PHYSICS

Posted by nat on Monday, February 4, 2008 at 3:24am.

A wire of initial length Lo and radius rO has a measured resistance of 1.0 ohm. the wire is drawn under tensil stress and to a new uniform radius of 0.25rO. what is the new resistance of the wire? i know the answer is 256 ohm but i have no clue how to get the answer can anyone help me?

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