Electrical Motors MCQ’s

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This set of Mechatronics Multiple Choice Questions & Answers (MCQs) focuses on “Electrical Motors”.

1. What is the working principle of DC motor?
a) Fleming’s right hand rule
b) Fleming’s left hand rule
c) Maxwell’s second law
d) Maxwell’s third law

2. What is the full form of CPR with respect to motor movement?
a) Clocks per rotation
b) Counts per revolution
c) Counts per rotation
d) Clocks per revolution

3. Who discovered the magnetic effect of electric current?
a) Grueblerowen
b) Joseph Henry
c) Oersted
d) Robert Abalakov

4. How many leads does a 2 phase bipolar stepper motor have?
a) 1
b) 3
c) 4
d) 5

5. Speed control of an ac motor can be achieved by varying the input frequency.
a) True
b) False

6. Which type of motor is not an encoder motor?
a) Stepper motor
b) Servo motor
c) BO motor
d) BLDC Drone motor

7. Speed of an induction motor remains same even if we increase the rotor resistance.
a) True
b) False

8. Which finger denotes the direction of current in Fleming’s left hand rule?
a) Middle finger
b) First finger
c) Thumb
d) Little finger

9. Who invented Induction motor?
a) Nicola Tesla
b) Vitaly Conrad
c) Philip Vaughan
d) Mark Henry

10. Which is an example of motor driver?
a) KSD9700
b) XMPA06B2131
c) L298N
d) 792XDXM4L-24A

11. AC motors do not have brushes.
a) True
b) False

12. Which finger denotes the direction of magnetic field in Fleming’s left hand rule?
a) Middle finger
b) First finger
c) Thumb
d) Little finger

13. Which is an example of single H-bridge type motor driver?
a) DRV8829
b) XMPA06B2131
c) L298N
d) 792XDXM4L-24A

14. How many windings does a 2 phase bipolar stepper motor have?
a) 2
b) 3
c) 4
d) 5

15. Which finger denotes the direction of force in fleming’s left hand rule?
a) Middle finger
b) First finger
c) Thumb
d) Little finger

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