engineering physics MCQ #2775

In an isothermal expansion of an ideal gas, the internal energy

engineering physics MCQ #2775

  1. Question 1

    Q1. In an isothermal expansion of an ideal gas, the internal energy

    • A) Increases
    • B) Decreases
    • C) Remains constant
    • D) First increases then decreases

    Answer: Remains constant

    Explanation: For an ideal gas, internal energy (U) depends only on temperature. In an isothermal process, T remains constant, so U remains constant.