Question

What does the commercial electric motor constitutes?​

Answer 1

Answer:

In an electric motor, a rectangular coil is placed in between the magnetic field and when current flows through the coil from the commutator rings, a torque acts on the coil which rotates it continuously. When the coil rotates, the shaft attached to it also rotates and thus mechanical work is done. In commercial electric motors field coils are used for producing magnetic fields and not a permanent magnet. These coils become magnetized when current is passed through them. Field coils give a stronger, more easily shaped magnetic field than permanent magnets. More the number of turns in the field coil, more the magnetic field. Therefore the suitable field coil sizes are used for various commercial purposes.