Q. The resistance will be least in a wire with dimension
A) $L/2,2A$
B) $2L,\ A$
C) $L,\ A$
D) None of these
Explanation
(a) $R = \frac{\rho l}{A}\ or\ R \propto l/A.$ Thus, resistance is least in a wire of length $L/2$ and area of cross-section $2A$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.