Q. When a piece of aluminium wire of finite length is drawn through a series of dies to reduce its diameter to half its original value, its resistance will become
A) Two times
B) Four times
C) Eight times
D) Sixteen times
Explanation
(d) In stretching of wire $R \propto \frac{1}{d^{4}},$ where $d =$ Diameter of wire
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.