Q. A force $F$ is needed to break a copper wire having radius $R$. The force needed to break a copper wire of radius $2R$ will be
A) $F/2$
B) $2F$
C) $4F$
D) $F/4$
Explanation
(c) Breaking Force $\propto$ Area of cross section of wire $(\pi r^{2})$ If radius of wire is double then breaking force will become four times
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.