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Thermodynamics — JEE physics STD 12 Science — Question

CBSE BoardEnglish MediumSTD 12 ScienceJEE physicsThermodynamics1 Mark
MCQ
Air in a cylinder is suddenly compressed by a piston, which is then maintained at the same position. With the passage of time
  • ✓
    The pressure decreases
  • B
    The pressure increases
  • C
    The pressure remains the same
  • D
    The pressure may increase or decrease depending upon the nature of the gas
✓

Answer

Correct option: A.
The pressure decreases
(a) Due to compression the temperature of the system increases to a very highvalue.Thiscauses the flow of heat from system to the surroundings, thus decreasing thetemperature.Thisdecrease in temperature results in decrease in pressure.

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