An electrical resistance wire of radius 1 mm with thermal conductivity 25 W/m K is heated by the flow of electric current which generates heat at the rate of 2  10 9 W/m 3 . Determine the centreline...

An electrical resistance wire of radius 1 mm with thermal conductivity 25 W/m K is heated by the flow of electric current which generates heat at the rate of 2
 10⁹
W/m³. Determine the centreline temperature rise above the surface temperature of the wire if the surface is maintained at a constant temperature.