Physics - Error Question with Solution | TestHub

A steel wire of diameter$0.5mm$and Young's modulus$2\times {10}^{11} N{m}^{-2}$carries a load of mass M. The length of the wire with the load is 1.0 m. A vernier scale with 10 divisions is attached to the end of this wire. Next to the steel wire is a reference wire to which a main scale, of least count 1.0 mm, is attached. The 10 divisions of the vernier scale correspond to 9 divisions of the main scale. Initially, the zero of vernier scale coincides with the zero of main scale. If the load on the steel wire is increased by$1.2 kg$, the vernier scale division which coincides with a main scale division is __________. Take$g=10 m{s}^{-1} \mathrm{a}\mathrm{n}\mathrm{d} \mathrm{\pi }= 3.2 .$