A cylindrical tube of uniform cross-sect...

A cylindrical tube of uniform cross-sectional area A is fitted with two air tight frictionless pistons. The pistons are connected to each other by a metallic wire. Initially the pressure of the gas is `P_0` and temperature is `T_0`, atmospheric pressure is also `P_0`. Now the temperature of the gas is increased to `2T_0`, the tension in the wire will be

`2P _(0) A`

`P _(0)A`

`(P_(0) A)/(2)`

`4 P _(0) A`

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