A cylindrical tube of uniform cross-sectional area \(A\) is filled with two air tight frictionless pistons. The pistons are connected to each other by a metallic wire. Initially, the pressure of the gas is \(p_o\) and temperature is \(T_o\), atmospheric pressure is also \(p_o\). Now, the temperature of the gas is increased to \(2T_o\), the tension of wire will be