Q. The resistance of a wire is $R\ \Omega.$The wire is stretched to double its length keeping volume constant. Now the resistance of the wire will become
A) $4\ R\ \Omega$
B) $2\ R\ \Omega$
C) $R/2\ \Omega$
D) $R/4\ \Omega$
Explanation
(a) When wire is stretched to doubled its length, its resistance becomes four times
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.