Question

What is the function of insulated copper coil in d.c. motor?

Answer 1

The insulated copper coil is wound on the soft iron core. When current flows through it, it sets up its own magnetic field. Since this coil is placed in the magnetic field of the radial magnets, its two sides experience equal and opposite forces, producing a couple that rotates the coil. Thus, the coil is the rotating part that converts electrical energy into mechanical energy.