Q. The speed of a dc motor can be controlled by varying
✅ Correct Answer: (D)
all of the above
Electrical and Electronics Engineering MCQs | Page - 2
Dear candidates you will find MCQ questions of Electrical and Electronics Engineering here. Learn these questions and prepare yourself for coming examinations and interviews. You can check the right answer of any question by clicking on any option or by clicking view answer button.
Q. The d.c. series motor should always be started with load because
✅ Correct Answer: (A)
at no load, it will rotate at dangerously high speed.
Q. In a d.c. machine, the armature mmf is
✅ Correct Answer: (C)
stationary w.r.t. field.
Q. In a DC motor, unidirectional torque is produced with the help of
✅ Correct Answer: (D)
both a and b
Q. The counter emf of dc motor
✅ Correct Answer: (C)
helps in energy conversion
Q. The Eb/V ratio of a dc motor is an indication of its
✅ Correct Answer: (A)
efficiency
Q. The induced emf in the armature conductors of a dc motor is
✅ Correct Answer: (A)
sinusoidal
Q. A dc motor can be looked upon as dc generator with the power flow
✅ Correct Answer: (B)
reversed
Q. The Ta/Ia graph of a dc series motor is a
✅ Correct Answer: (D)
parabola upto full load and a straight line at overloads
Q. When load is removed, .......motor will run at the highest speed.
✅ Correct Answer: (D)
series
Jump to