In order to quadruple the resistance of a uniform wire, a part of it is uniformly stretched so that the…

In order to quadruple the resistance of a uniform wire, a part of it is uniformly stretched so that the final length of the wire becomes 1.5 times the original length. The fractional length of the stretched part is
  1. $\frac{1}{6}$
  2. $\frac{1}{8}$
  3. $\frac{1}{4}$
  4. $\frac{1}{10}$

Solution

$\frac{1}{8}$

Asked in: AP EAMCET 2023 (18 May Shift 1)

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