Question

construction of electric motor ​

Answer 1

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Answer 2

$\huge\mathcal\red{Answer}$

Construction: An electric motor consists of the following main parts:

1. Field magnet: It is a strong horse shoe type magnet with concave poles.

2. Armature: It is a rectangular coil ABCD having a large number of turns of thin insulated copper wire wound over a soft iron core.

The armature is placed between the poles of the field magnet and it can be rotated about an axis perpendicular to the magnetic field lines.

3. Split ring commutator: It consists of a cylindrical metal ring split into two halves S1and S2. The two ends A and D of the armature coil are connected to the split rings S1 and S2 respectively. As the coil rotates, the split rings also rotate about the same axis of rotation. The function of the split ring commutator is to reverse the direction of current in the coil after every half rotation.

4. Brushes: Two graphite or flexible metal rods maintain a sliding contact with split rings S1 and S2, alternately.

5. Battery: A battery of few cells is connected to the brushes. The current from the battery flows to the armature coil through the brushes and the split rings.

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