A long cylindrical pipe of radius 20 cm is closed at its upper end and has an airtight piston of negligible mass as shown. When a 50 Kg mass is attached to the other end of the pistion, it moves down. If the air in the enclosure is cooled from temperature T to `T – DeltaT`, the piston moves back to its original position. Then `DeltaT//T` is close to (Assuming air to be an ideal gas, `g = 10 m//s^(2)`, atmospheric pressure is `10_(5)` Pascal), A. `0.01`B. `0.02`C. `0.04`D. `0.09`

A long cylindrical pipe of radius 20 cm is closed at its upper end and

1.	A long cylindrical pipe of radius 20 cm is closed at its upper end and has an airtight piston of negligible mass as shown. When a 50 Kg mass is attached to the other end of the pistion, it moves down. If the air in the enclosure is cooled from temperature T to `T – DeltaT`, the piston moves back to its original position. Then `DeltaT//T` is close to (Assuming air to be an ideal gas, `g = 10 m//s^(2)`, atmospheric pressure is `10_(5)` Pascal), A. `0.01`B. `0.02`C. `0.04`D. `0.09`
Answer» Correct Answer - C

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