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DC Motors

DC Motors
The maximum end play of a motor is about

6 mm
2 mm
10 mm
0.4 mm

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DC Motors
The compensating winding is connected in

None of the listed here
Series with armature
Series-parallel with armature
Parallel with armature

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DC Motors
By putting controller resistance in series with the armature of a dc motor, we can obtain speeds

Above as well as below the normal speed
Above the normal speed only
Below the normal speed only
None of the listed here

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DC Motors
The armature torque of the D.C. shunt motor is proportional to

None of these
field flux only
armature current only
both (A) and (B)

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DC Motors
These days dc motors are widely used in

Machine shops
Pumping sets
Electric traction
Air compressors

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DC Motors
Which of the following loss in a D.C. generator varies significantly with the load current?

Windage loss
Field copper loss
Armature copper loss
None of these

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