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Q.

The air tight and smooth piston of a cylindrical vessel are connected with a string, as shown. Initially pressure and temperature of the gas are P0 and T0 . The atmospheric pressure is also P0 . At a later time, tension in the string is 38P0A where A is the cross sectional area of the cylinder. At this time, the temperature of the gas has become.

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a

118T0

b

38T0

c

34T0

d

138T0

answer is C.

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Detailed Solution

T=P0A=PA T=PP0A =38P0A( given ) P=38P0+P118P0

Now volume is constant by string So, PαT

Initial temperature is T0

 Now as pressure has become 118P0 temperature will be 118T0.

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The air tight and smooth piston of a cylindrical vessel are connected with a string, as shown. Initially pressure and temperature of the gas are P0 and T0 . The atmospheric pressure is also P0 . At a later time, tension in the string is 38P0A where A is the cross sectional area of the cylinder. At this time, the temperature of the gas has become.