Two wires of different material have same length and area P of cros...

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Two wires of different material have same length and area
P of cross section. What is the ratio of their increases in length
\( \mathrm{DV} \) when the forces applied are the same?
\[
\left(\mathrm{Y}_{1}=0.90 \times 10^{11} \mathrm{Nm}^{-2}, \mathrm{Y}_{2}=3.60 \times 10^{11} \mathrm{Nm}^{-2}\right)
\]
a. \( 4: 1 \)
b. \( 1: 4 \)
c. \( 2: 1 \)
d. \( 1: 2 \)
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