A ideal gas having f degrees of freedom is kept inside a thermally insulated vessel, the vessel has two large pistons each with charge of +Q and -Q. Assume charges are uniformly distributed. Pistons can move without friction inside the vessel. At an instant the charge of pistons is increased k times with the help of an external agent. Then which of the following statements are correct (A) (B) (C) (D) Vacuum Gas Vacuum The Ratio of final to initial temperature of gas in equilibrium is The Ratio of final to initial temperature of gas in equilibrium is 10 K +f 2+f Work done by the agent in the process is (K-1)- between pistons. 2K +f 2+f Work done by the agent in the process is (K2-1)nRT, where T, is initial temperature. QL where L, is initial separation A%