Question

Select One Option Correct from the following : A student performs an experiment to determine the Young’s modulus of a wire, exactly 2 m long, by Searle’s method. In a particular reading, the student measures the extension in the length of the wire to be 0.8 mm with an uncertainty of $\pm0.05 mm$ at a load of exactly 1.0 kg. The student also measures the diameter of the wire to be 0.4 mm with an uncertainty of $\pm0.01 mm$. Take $g = 9.8 m/s^{2}$ (exact). The Young’s modulus obtained from the reading is
(A)$(2.0 \pm 0.3) \times 10^{11} N/m^{2}$
(B)$(2.0 \pm 0.2) \times10^{11} N/m^{2}$
(C)$(2.0 \pm 0.1) \times10^{11} N/m^{2}$
(D)$(2.0 \pm 0.05) \times10^{11} N/m^{2}$

Answer 1

c option is correct I think