Determine the coefficient of heat transfer by free convection convection heat transfer rate per mere length and maximum current density for a nichrom wire 0.5 mm in diameter. The surface of the wire...

Determine the coefficient of heat transfer by free convection convection heat transfer rate per mere length and maximum current density for a nichrom wire 0.5 mm in diameter. The surface of the wire is maintained at 300ºC. The wire is exposed to still air at 20°C and resistance per metre length of the wire is 6 Ω/m.