First slide

Ohm's law

Question

Statement 1: When the length of a conductor is stretched to double, its resistance will also get doubled.
Statement 2: Resistance is inversely proportional to the length of a conductor.

Easy

A

Both statements 1 and 2 are correct
B

Statement 1 is correct statement 2 is incorrect
C

Statement 1 is incorrect statement 2 is correct
D

Both statements 1 and 2 are incorrect

Solution

$\begin{array}{l} R = ρ \frac{l}{A} \\ when l = 2 l, A = A / 2 \\ (Because volume V_{1} = V_{2} .) \\ ∴ R^{'} = \frac{4 ρl}{A} \end{array}$

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