Interfacing motors in 8051

Interfacing motors in 8051

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Question 1 of 20

1. Question
1. What is dc motor
- a. A DC motor is any of a class of rotary electrical motors that converts direct current electrical energy into mechanical energy
- b. A DC motor is any of a class of rotary electrical motors that converts direct current mechanical energy into electrical energy
- c. Both
- d. None of this
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Question 2 of 20

2. Question
2. How to change speed of dc motor
- a. By using a variable voltage supply
- b. By changing strength of current in its field windings
- c. Both
- d. None of this
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Question 3 of 20

3. Question
3. The main purpose of interfacing with 8051 is________
- a. To reduce power
- b. To control cast
- c. To control the speed of motor
- d. None of this
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Question 4 of 20

4. Question
4.Which controller is used to interface 8051 with dc motor
- a. ULN2003A
- b. L293D
- c. AR1100
- d. None of this
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Question 5 of 20

5. Question
6. How many poles dc motor contains?
- a. 2
- b. 4
- c. 6
- d. 8
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Question 6 of 20

6. Question
6. Specifications dc motor driver circuit
- a. 600 MA per channel
- b. 4.5V to 36V voltage range
- c. 16 pins
- d. 60MA
- e. 3.5 V to 25V voltage range
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Question 7 of 20

7. Question
7. What is four quadrant dc-motor?
- a. The motor which operates clock wise and anti clockwise
- b. The motor which operates only clock wise
- c. The motor which operates only anti-clock wise
- d. The motor which operates in forward break, reverse break, clock and anti clock wise
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Question 8 of 20

8. Question
8. Applications of dc motors
- a. Home appliances
- b. Industrial applications
- c. Agriculture fields
- d. All the above
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Question 9 of 20

9. Question
9.Types of dc motor
- a. Self excited
- b. Separately excited
- c. Permanent magnet
- d. All the above
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Question 10 of 20

10. Question
10. based on__________ rule dc-motor
- a. Fleming’s right hand rule
- b. Fleming’s left hand rule
- c. Both
- d. None of this
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Question 11 of 20

11. Question
11. Brushless dc –motor is_________
- a. Series wound dc-motor
- b. Shunt dc-motor
- c. Self excited motor
- d. Stepper motor
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Question 12 of 20

12. Question
12. Stepper motor which is used to inter facing of 8051, which takes________ steps for one ration(360’)
- a. 300
- b. 400
- c. 100
- d. 200
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Question 13 of 20

13. Question
13. For one step how much of angle the stepper motor will rotates
- a. 2.1
- b. 1.9
- c. 1.8
- d. 1.6
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Question 14 of 20

14. Question
14. ___________ are the types of stepper motor
- a. Uni-polar
- b. Bi- polor
- c. Try-polor
- d. None of this
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Question 15 of 20

15. Question
16. To rotate 90 degree’s how steps are required
- a. 50
- b. 60
- c. 90
- d. 45
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Question 16 of 20

16. Question
16. ____________ is the driver circuit of stepper motor
- a. ULN2003A
- b. L293D
- c. AR1100
- d. None of this
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Question 17 of 20

17. Question
17. Working modes of Uni- Polar stepper motor
- a. Wave drive
- b. full drive
- c. half drive
- d. None of this
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Question 18 of 20

18. Question
18. Specifications of interfacing driver of stepper motor with 8051
- a. 500 mA rated collector current (single output)
- b. 50 V output (there is a version that supports 100 V output)
- c. Includes output flyback diodes
- d. Inputs compatible with TTL and 5-V CMOS logic
- e. All of the above
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Question 19 of 20

19. Question
19. Advantages of stepper motor
- a. Low cost for control achieved
- b. High torque at startup and low speeds
- c. Ruggedness
- d. Simplicity of construction
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Question 20 of 20

20. Question
20. Applications of stepper motor
- a. stepper motors are used in floppy disk drives, flatbed scanners, computer printers, plotters, slot machines, image scanners, compact disc drives
- b. Intelligent lighting, camera lenses
- c. CNC machines and, more recently, in 3D printers
- d. All the above
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