Two wires are made of the same material and have the same volume.

Question:

Two wires are made of the same material and have the same volume. However wire 1 has crosssectional area $\mathrm{A}$ and wire 2 has cross-sectional area $3 \mathrm{~A}$. If the length of wire 1 increases by $\Delta \mathrm{x}$ on applying force F, how much force is needed to stretch wire 2 by the same amount ?

  1. $6 \mathrm{~F}$

  2. $9 \mathrm{~F}$

  3. $\mathrm{F}$

  4. $4 \mathrm{~F}$


Correct Option: 1

Solution:

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