Question

12. Explain the principle of working of simple electric motor. What is the role of
split rings in an electric motor? How are commercial motors different from
simple electric motor.
OR
Explain the following with reference to the magnetic field around a straight
conductor carrying current.
(i) Tracing the pattern of magnetic field
(ii) increasing the intensity of magnetic field
(iii) Reversing the direction of electric current.​

Answer 1

In electric motors, the split ring acts as a commutator. ... In commercial motor an electromagnet is used in place of permanent magnet. Commercial motors have more number of turns of conducting wire in current carrying coil. Commercial motors have soft iron core on which the coil is wound.

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