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NEST2016PhysicsMechanical Properties of Solids

A student did an experiment to determine the Young's modulus (Y) of a nylon thread, 2.00 m in length, using Searle's method. A Vernier callipers having a least count of 0.01 mm was used to measure the diameter of the thread. The length and extensions were measured by using a scale with a least count of 1 mm . The data obtained by the student are shown in the table below. Assume the uncertainty in force to be 0.01 N .

Options

  1. AThe student reports Y to be about 5 GPa .
  2. BThe reported uncertainty in Y is 54 % .
  3. CMeasuring the extension using a travelling microscope with a least count of 0.1 mm would improve the accuracy
  4. DThe stress is 1.8 GPa .

Correct answer

C. Measuring the extension using a travelling microscope with a least count of 0.1 mm would improve the accuracy

Step-by-step solution

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