DC Motors MCQs
Practice free DC Motors multiple-choice questions with instant answer feedback and step-by-step solutions. Click an option to check yourself, reveal the full explanation, and work through all 313 questions — no login required.
Question 208easy
Which of the following can be used to control the speed of a D.C. motor?
Question 209easy
The losses occurring in a D.C. generator are given below. Which loss is likely to have the least proportion?
Question 210easy
If 't' be the thickness of the laminations, then eddy current loss in a generator will vary as
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Question 211easy
Which of the following loss in a is equal to the applied more than the
Question 212easy
If Bmax is the maximum flux density, then eddy current loss will vary as
Question 213easy
The hysteresis loss in a D.C. generator varies with the frequency of magnetic reversals as
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Question 214easy
Which of the following methods of braking is used in rolling mills?
Question 215easy
Regenerative method of braking is based on that
Question 216easy
The retardation test is applicable to shunt motors and generators and is used to find