In isothermal process, ΔT = 0, so ΔU = 0. By first law: Q = W.
Back to JEE Main 2026 Thermodynamics
JEE Main 2026 — Physics Thermodynamics
medium
mcq
2026
Official previous-year question
Verified 30 May 2026.
Question
An ideal gas undergoes an isothermal expansion. Which of the following is true?
Options
- A
Internal energy increases
- B
Temperature increases
- C
Work done by gas equals heat absorbed
- D
Pressure remains constant
Solution
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