Avoiding brush arm currents & copper losses in D.C. machines.

Q.  Practically in d.c. machines, it may happen that the emf induced in different parallel paths may not be same. This will cause inequality in brush arm currents and will give rise to copper losses. These effects can be avoided by using
- Published on 23 Oct 15

a. Compensating windings
b. Interpoles
c. Equalizer rings
d. All of these

ANSWER: Equalizer rings

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