Question:medium
Two wires are made of the same material and have the same volume. However wire 1 has cross-sectional area A and wire 2 has cross-sectional area 3A. If the length of wire 1 increases by Δ x on applying force F, how much force is needed to stretch wire 2 by the same amount?
Two wires are made of the same material and have the same volume. However wire 1 has cross-sectional area A and wire 2 has cross-sectional area 3A. If the length of wire 1 increases by Δ x on applying force F, how much force is needed to stretch wire 2 by the same amount?
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For wires of same material and volume:
Δ L ∝ (F)/(A²)
Always use volume constraint to relate lengths.
Updated On: Mar 19, 2026
- \(4F\)
- \(6F\)
- \(9F\)
- F
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The Correct Option is B
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