Mica-covered copper wire, also known as magnet wire, is a type of electrical wire that consists of a copper conductor insulated with a layer of mica. It is widely used in various electrical applications due to its excellent electrical and thermal properties.

The copper conductor in mica-covered wire provides good conductivity, making it suitable for transmitting electrical signals or carrying electrical currents. Copper is a preferred choice for conductors in many applications because of its high conductivity and corrosion resistance.

The mica insulation layer surrounding the copper conductor serves to provide electrical insulation. Mica is a natural mineral with excellent dielectric strength, meaning it can withstand high voltages without breaking down. Mica is also resistant to heat and has good thermal conductivity, which helps dissipate heat generated during electrical operations.