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Set 5 of 5 · Questions 121-122 of 122

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NEET Physics · Thermal Properties & Calorimetry · Set 5 (Q121-122)

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  1. 121.
    Which of the following figure represents the relation between Celsius and Fahrenheit
    temperatures?
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  2. 122.
    A wooden wheel of radius R is made of two semicircular parts (see figure). The two parts are held together by a ring made of a metal strip of cross-sectional area S and length L. L is slightly less than 2πR. To fit the ring on the wheel, it is heated so that its temperature rises by T and it just steps over the wheel. As it cools down to surrounding temperature, it presses the semicircular parts together. If the coefficient of linear expansion of the metal is α, and its Young's modulus is Y, the force that one part of the wheel applies on the other part is:
    1. (1)2πSYαΔT
    2. (2)SYαΔT
    3. (3)πSYαΔT
    4. (4)2SYαΔT