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NEST2019PhysicsThermal Properties of Matter

A metal rod of cross-sectional area 10⁻⁴ ~m ^2 is hanging in a chamber kept at 20 ^ C with a weight attached to its free end. The coefficient of thermal expansion of the rod is 2.5 10⁻⁶ ~K ⁻¹ and its Young's modulus is 4 10¹² ~N ~m ⁻² . The weight attached to the rod is increased by 5000 N but the temperature of the chamber is lowered so that the length of the wire is unchanged. Then, the temperature of the chamber i

Options

  1. A5^ C
  2. B15 ^ C
  3. C12 ^ C
  4. D0 ^ C

Correct answer

B. 15 ^ C

Step-by-step solution

No solution available.

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