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Thermodynamics — JEE physics STD 12 Science — Question

CBSE BoardEnglish MediumSTD 12 ScienceJEE physicsThermodynamics1 Mark
MCQ
A given system undergoes a change in which the work done by the system equals the decrease in its internal energy. The system must have undergone an
  • A
    lsothermal change
  • ✓
    Adiabatic change
  • C
    lsobaric change
  • D
    Isochoric change
✓

Answer

Correct option: B.
Adiabatic change
In adiabatic change $Q=$ constant $\Rightarrow \Delta Q=0$
So $(\Delta W=\Delta U(\because \Delta Q=\Delta U+\Delta W)$

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