AIPMT 2012 physics questions with solutions

Showing 1–4 of 4 questions

• MCQeasyThermodynamicsheat and principle of calorimeter

  Liquid oxygen at 50 K is heated to 300 K at a constant pressure of 1 atm. The rate of heating is constant. Which of the following graphs represents the variation of temperature with time?

  Options

  • Option A

    Image 1

  • Option B

    Image 2

  • Option C

    Image 3

  • Option D

    Image 4

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• MCQmediumThermodynamicscyclic process its efficiency ,second law of thermodynamics

  A thermodynamic system is taken through the rectangular cycle ABCDA shown in the P–V diagram, with A = (V, P), B = (3V, P), C = (3V,2P), and D = (V,2P). The net heat rejected by the gas during the cycle is:

  Options

  • Option A

    2PV

  • Option B

    4PV

  • Option C

    PV/2

  • Option D

    PV

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• MCQmediumThermodynamicsthermodynamic process and work done

  One mole of an ideal gas goes from an initial state A to a final state B in two processes: first isothermal expansion from volume V to 3V, then compression from 3V to V at constant pressure. Choose the correct P–V diagram representing the two processes:

  Options

  • Option A

    Image 1

  • Option B

    Image 2

  • Option C

    Image 3

  • Option D

    Image 4

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• MCQmediumThermodynamicsfirst law of thermodynamics

  An ideal gas goes from state A to state B by three different processes labelled 1, 2 and 3 in the P–V diagram. If Q₁, Q₂, Q₃ denote the heats absorbed and ΔU₁, ΔU₂, ΔU₃ the changes in internal energy along the three paths respectively, which relation is correct?

  Options

  • Option A

    Q₁ > Q₂ > Q₃ and ΔU₁ = ΔU₂ = ΔU₃

  • Option B

    Q₃ > Q₂ > Q₁ and ΔU₁ = ΔU₂ = ΔU₃

  • Option C

    Q₁ = Q₂ = Q₃ and ΔU₁ > ΔU₂ > ΔU₃

  • Option D

    Q₃ > Q₂ > Q₁ and ΔU₁ > ΔU₂ > ΔU₃

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