Electrical Engineering XYZ MCQs

In a dc machine 72 number of coils are used. Find the number of commutator segments required:

- 72
- 74
- 36
- 37

Correct answer: 1. 72

Explanation: To solve this multiple-choice question, we need to understand the relationship between the number of coils and the number of commutator segments in a DC machine.

In a DC machine, each coil corresponds to one armature winding. The number of commutator segments needed is equal to the number of armature coils.

Given that there are 72 coils, the number of commutator segments required would also be 72.

So, the correct answer is: 72