An electrical conductor of copper with a diameter of 1 mm is covered with a plastic insulation of thickness 1 mm. The temperature of its surroundings is 20°C. Find the maximum current carried by...

An electrical conductor of copper with a diameter of 1 mm is covered with a plastic insulation of thickness 1 mm. The temperature of its surroundings is 20°C. Find the maximum current carried by conductor so that no part of plastic is above 80°C