Q 11-08-015NEETJEE MainMedium
A wire can hold a maximum load of $100$ kg before breaking. Another wire of the same material, twice as long and with twice the radius, can hold a maximum load of
Answer: (C) $400$ kg
Breaking load $= \text{breaking stress} \times \text{area}$. The breaking stress depends only on the material, and the length plays no part.
Doubling the radius makes the area $4$ times, so the load is $4 \times 100 = 400$ kg.
Solution by Sreeraj P, M.Sc Physics