A current of 200 amp is passed through a stainless-steel wire 0.25 cm in diameter. The resistivity of steel may be taken as 70 W cm, and the length of wire is 1 m. If the outer surface temperature of...

A current of 200 amp is passed through a stainless-steel wire 0.25 cm in diameter. The resistivity of steel may be taken as 70 W cm, and the length of wire is 1 m. If the outer surface temperature of the wire is maintained at 180°C, calculate the centre temperature. Assume k for stainless steel as 30 W/m K.