Question:
Dummy coils are used in wave wound d.c. machines to reduce
Dummy coils are used in wave wound d.c. machines to reduce
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Dummy coils help in maintaining physical and mechanical symmetry in DC machines.
Updated On: May 23, 2025
- Hysteresis losses
- Mechanical imbalance on armature
- Frictional losses
- Mechanical imbalance on iron frame
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The Correct Option is B
Solution and Explanation
Dummy coils are non-connected coils added to maintain mechanical balance on the rotor when winding symmetry isn't achievable.
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