A wire of length L and resistance R is now drawn out by pulling such that its new length is 1.5L.What is its new resistance? (Assume the density remains constant.) A)1.00 R B)1.50 R C)2.25 R D)5.06 R E)4.44 $\times$ 10^-1 R

Question

Quizplus · Accepted Answer

Resistivity of a material remains constant under normal conditions. As length of the wire has been increased by 1.5 times, its resistance will also increase by the same factor (assuming the cross-sectional area remains constant).

So, 
New resistance = (1.5 R)(1.5 R) = 2.25 R

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