Heat and Thermodynamics| Practice MCQs Physics for Mdcat | mosaicbro.com

Heat and Thermodynamics| Practice MCQs Physics for Mdcat

7 of 106 questions (Page 12 of 16)

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78 The process in which the Pressure of the system remains constant is called:
Correct Answer: A
Explanation: Isobaric processes maintain constant pressure.
79 In an adiabatic process:
Correct Answer: B
Explanation: In adiabatic processes, work is done using internal energy.
80 On a hot day or in hot climates white clothes are worn because they are good:
Correct Answer: C
Explanation: White clothes reflect heat, keeping the body cool.
81 The equation $PV^\gamma = \text{constant}$ holds good in:
Correct Answer: A
Explanation: $PV^\gamma = \text{constant}$ describes adiabatic processes.
82 In an isothermal process, the internal energy of the system:
Correct Answer: C
Explanation: Internal energy depends only on temperature, which is constant.
83 Which one of the following is the example of irreversible process:
Correct Answer: B
Explanation: Work against friction is irreversible due to energy dissipation.
84 Which one of the following is the example of reversible process:
Correct Answer: B
Explanation: Melting of ice at equilibrium is reversible.
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