A wire of radius r and length L on which a mass M is suspended so that its increase in length is T. Young modulus will be:
A. \(\frac{\mathrm{MgL}}{\pi r^{2} l}\)
B. \(\frac{\mathrm{Mgl}}{\pi r^{2} \mathrm{~L}}\)
C. \(\frac{\pi r^{2} L}{M g l}\)
D. \(\frac{\pi r^{2} l}{\mathrm{MgL}}\)
Answer:A
A wire of radius r and length L on which a mass M is suspended so that its increase in length is T. Young modulus will be:
A. \(\frac{\mathrm{MgL}}{\pi r^{2} l}\) B. \(\frac{\mathrm{Mgl}}{\pi r^{2} \mathrm{~L}}\) C. \(\frac{\pi r^{2} L}{M g l}\) D. \(\frac{\pi r^{2} l}{\mathrm{MgL}}\)