A student performs an experiment to determine 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 ± 0.05 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 ± 0.01 mm. The young's modulus obtained from the reading is [Take g = 9 .8 ms -2 ]
Text Solution
Verified by ExpertsThe correct answer is:
B
(2 .0 ±0 .2) x 10 11 Nm -2
Young's modulus 
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