Q137 / 170 · Manipal (MET) 2020 · Physics

Internal energy of a gas remains unchanged I. an isothermal process II. an adiabatic process III. a reversible process IV. a cyclic process
Which of these are true?

  • Correct answer
    A
    I and IV
  • B
    I, III and IV
  • C
    III and IV
  • D
    II and III

Solution

For isothermal process, $d U=0$, i.e., internal energy remains unchanged. For a cyclic process, $d U=0$, i.e., internal energy remains unchanged.

Hence, the correct answer is option: 'A'.

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