Question

If the resistance of a uniform wire of length $1,m$ of cross-sectional area $0.1,m^2$ is $12,\Omega$, then the resistance of wire of length $2,m$ of the same material with area of cross section $0.2,m^2$ is

• A. $24,\Omega$
• B. $6,\Omega$
• C. $12,\Omega$
• D. $40,\Omega$
• E. $4,\Omega$

Hint:

Physics Tip: If both length and area are doubled, $\frac{L}{A}$ remains same, so resistance remains unchanged.

Answer 1

The Correct Option is C