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 190easy
The mechanical power developed by a approximately.shunt motor will be maximum when the ratio of back e.m.f. of applied voltage is
Question 191easy
The condition for maximum power in case of D.C. motor is
Question 192easy
For which of the following applications a D.C. motor is preferred over an A.C. motor?
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Question 193easy
In D.C. machines the residual magnetism is of the order of
Question 194easy
If Ta be the torque and la the armature current for a D.C. motor, then which of the following relation is valid before saturation?
Question 195easy
Speed control by Ward Leonard method give uniform speed variation
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Question 196easy
The speed regulation of a D.C. motor is
Question 197easy
As there is no back e.m.f. at the instant of starting a D.C. motor, in order to prevent a heavy current from flowing though the armature circuit
Question 198easy
If 1a be the armature current, then speed of a D.C. shunt motor is