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11. A cylindrical tube of uniform cross-sectional area A is fitted with two air tight frictionless pistons.

temperature is T0, atmospheric pressure is also P0. Now the temperature of the gas is increased to 2T0, the tension in the wire will be

(a)  2P0A                                 (b) P0A

(c)  P0A /2                              (d) 4P0A

Ans. b

(19)

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