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A resistance coil of resistance r connec...

A resistance coil of resistance r connected to an external battery, is placed inside an adiabatic cylinder fitted with a frictionless platon of mass m and same area A. Initially cylinder contains one mole of ideal gas he. A current through the coil such that temperature of gas varies as `T=T_(0)+"at"+"bt"^(2),` keeping pressure constant with time t. Atosphere pressure above piston is `P_(0)`. Find

(a) Current l flowing through the coil as function of time and
(b) Speed of piston as function of time.

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