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Units and Measurements question

2018 · Shift 2 · Q46
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Units and Measurements question

2018 · Shift 2 · Q46

JEE AdvancedPhysicsUnits and MeasurementsNumerical+3 / −1
A steel wire of diameter 0.5mm0.5mm0.5mm and Young's modulus 2×1011  Nm−22 \times {10^{11}}\,\,N{m^{ - 2}}2×1011Nm−2 carries a load of mass M.M.M. The length of the wire with the load is 1.0m.A1.0m.A1.0m.A vernier scale with 101010 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 1.0mm1.0mm1.0mm, is attached. The 101010 divisions of the vernier scale correspond to 999 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 1.2kg,1.2kg,1.2kg, the vernier scale division which coincides with a main scale division is ‾\underline{\hspace{2cm}}​. Take g=10 m s−2.g = 10\,m\,{s^{ - 2}}.g=10ms−2. and π=3.2.\pi = 3.2.π=3.2.
Numerical answer
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