A motor is a device which converts electrical energy into mechanical energy. For example, a mixer has rotating blades that mash and mix things. The electric energy input to the mixer is converted into mechanical energy of rotation of the blades and thus the desired action is achieved.
In commercial motors:
(a) The coil is wound on a soft iron core. The soft iron core becomes magnetized and increases the strength of magnetic field. This makes the motor more powerful. The assembly of soft iron core and coil is called an armature.
(b) The coil contains a large number of turns of the insulated copper wire.
(c) A powerful electromagnet is used in place of permanent magnet.
Electric motors are used in a variety of applications. Some of them are listed below
The efficiency of a functioning motor is around as the remaining energy is dissipated as noise and heat.
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