MCQ
Two wires $A$ and $B$ of the same material have radii in the ratio $2 : 1$ and lengths in the ratio $4 : 1$. The ratio of the normal forces required to produce the same change in the lengths of these two wires is:
- ✓$1 : 1$
- B$2 : 1$
- C$1 : 2$
- D$1 : 4$
