Q. A certain piece of silver of given mass is to be made like a wire. Which of the following combinations of length $(L)$ and the area of cross-section $(A)$ will lead to the smallest resistance
A) $L$ and $A$
B) $2L$ and $A/2$
C) $L/2$ and $2\ A$
D) Any of the above, because volume of silver remains same
Explanation
(c) $R = \rho\frac{l}{A}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.