Q 1 :    

A 3 m long wire of radius 3 mm shows an extension of 0.1 mm when loaded vertically by a mass of 50 kg in an experiment to determine Young’s modulus. The value of Young’s modulus of the wire as per this experiment is $P\times {10}^{11}{\text{N m}}^{-2},$ where the value of P is: (Take $g=3\pi {\text{m/s}}^2$)           [2025]

• 5

   

• 10

   

• 25

   

• 2.5