The passage of electrical current through conductors generates heat, which must be dissipated to prevent damage heat is generated according to the expression q"" ircond where l is the electrical current density (a. m-2) and rcond is the internal resistance (ω.m). a copper wire of diameter r 2 mm carries current density of 1000 a. cm-2 and electrical resistance of rcond 2 x106 q. cm. the copper is insulated with a material which has a thermal conductivity of 103 w. cm1.k-1 and the outside of the wire is exposed to moving air with a convective heat transfer coefficient of 0.002 w. cm2.k. i) what is the heat transfer rate per unit length of the wire at the interface between the copper and the insulating material? (i. e. i) what is the critical radius of insulation (r2c)? i) plot the temperature difference between the copper surface and ambient air as a function of the radius of insulation. show all working and attach a print out of your plot with axes labelled clearly (use values between r1 and 2 x r2c (critical radius) for the x-axis)