Question 87: Properties of Matter

Question

A 100 m long wire having cross-sectional area $$\mathrm{6.25	imes10^{-4}~m^2}$$ and Young's modulus is $$\mathrm{10^{10}~Nm^{-2}}$$ is subjected to a load of 250 N, then the elongation in the wire will be :

Accepted Answer

Elongation in wire $\delta=\frac{\mathrm{F} \ell}{\mathrm{AY}}$
$$
\begin{aligned}
& \delta=\frac{250 	imes 100}{6.25 	imes 10^{-4} 	imes 10^{10}} \\
& \delta=4 	imes 10^{-3} \mathrm{~m}
\end{aligned}
$$

Answer

$$\mathrm{6.25	imes10^{-6}~m}$$

Answer

$$\mathrm{4	imes10^{-3}~m}$$

Answer

$$\mathrm{4	imes10^{-4}~m}$$

Answer

$$\mathrm{6.25	imes10^{-3}~m}$$

Properties of Matter

A 100 m long wire having cross-sectional area $\mathrm{6.25\times10^{-4}~m^2} and Young's modulus is \mathrm{10^{10}~Nm^{-2}}$ is subjected to a load of 250 N, then the elongation in the wire will be :

Choose the correct answer: