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NEET 2008 (AIPMT) · Ohm's Law, Resistivity & Temperature

Ohm's Law, Resistivity & Temperature question from NEET 2008 (AIPMT)

Q62NEET 2008 · AIPMTEasy

Ohm's Law, Resistivity & Temperature

A wire of a certain material is stretched slowly by ten percent. Its new resistance and specific resistance become respectively

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Answer: (d)

Constant volume gives $R \propto l^2$ ; $l' = 1.1\,l$ .
$R' = (1.1)^2 R = 1.21 R$
Specific resistance is a material property, so it stays the same.
So the answer is (d) 1.21 times, same.

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