JEE Main 2003 — Current Electricity Question with Solution
JEE Main 2003
Question
The length of a given cylindrical wire is increased by . Due to the consequent decrease in diameter the change in the resistance of the wire will be
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Show full solutionCorrect option: D
Correct answer
D
Step-by-step explanation
or
$\Rightarrow \mathrm{r}_2=\frac{\mathrm{r}}{\sqrt{2}}$$;\mathrm{R}=\rho \frac{1}{\pi^2}$
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This is a previous-year question from JEE Main 2003, covering the Current Electricity chapter of Physics. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.