Robotics Worksheet: DC and Servo Motors

Robotics lesson 12: DC motors and servo motors · Set 211 · 40 questions

Robot tip (Spin or point): DC motor: spins continuously; swap its wires to reverse it. Servo: goes to a set angle between 0° and 180°. Servo turn = bigger angle − smaller angle (30° to 120° = 90°). A program like angle = 90, angle = angle + 30 adds and takes away degrees in order.

1. 1.⚙️ DC motor or servo motor: which one spins faster with more V? (a) a DC motor (b) a servo motor
2. 2.True or false: “drives the wheels” is true of a servo motor. (a) False (b) True
3. 3.🦾 A servo arm points right at 0°, straight up at 90° and left at 180°. It is set to 180°. Where does the arm point? (a) points up and left (b) points straight up (c) points left (d) points right
4. 4.🦾 A servo arm points right at 0°, straight up at 90° and left at 180°. It is set to 0°. Where does the arm point? (a) points up and left (b) points right (c) points straight up (d) points left
5. 5.⚙️ A common servo can turn from 0° up to about … (a) 10° (b) 180° (c) 1800° (d) 18°
6. 6.True or false: “has just two wires” is true of a DC motor. (a) False (b) True
7. 7.True or false: “has just two wires” is true of a servo motor. (a) False (b) True
8. 8.True or false: “holds a set angle” is true of a DC motor. (a) True (b) False
9. 9.🦾 A servo program runs:
   angle = 130
   angle = angle + 30
   angle = angle − 60
   angle = angle − 40
   To what angle (in degrees) does the servo turn in the end?
10. 10.⚙️ DC motor or servo motor: which one has a signal wire? (a) a servo motor (b) a DC motor
11. 11.True or false: “spins round and round” is true of a servo motor. (a) False (b) True
12. 12.⚙️ Which motor is best for spinning a robot’s wheels round and round? (a) a light sensor (b) a buzzer (c) a DC motor (d) a servo motor
13. 13.🦾 A servo turns 60° every 100 ms. How many milliseconds does it take to turn 180°?
14. 14.🦾 A servo moves from 110° to 10°. How many degrees does it turn?
15. 15.True or false: “spins faster with more V” is true of a servo motor. (a) True (b) False
16. 16.🦾 A servo program runs:
    angle = 60
    angle = angle − 60
    angle = angle + 40
    To what angle (in degrees) does the servo turn in the end?
17. 17.⚙️ Which motor is best for turning a robot arm to exactly 45°? (a) a DC motor (b) a buzzer (c) a fan (d) a servo motor
18. 18.True or false: “spins round and round” is true of a DC motor. (a) False (b) True
19. 19.🦾 A servo program runs:
    angle = 130
    angle = angle − 10
    angle = angle + 40
    To what angle (in degrees) does the servo turn in the end?
20. 20.⚙️ DC motor or servo motor: which one spins round and round? (a) a DC motor (b) a servo motor
21. 21.🦾 A servo moves from 160° to 0°. How many degrees does it turn?
22. 22.⚙️ DC motor or servo motor: which one has just two wires? (a) a servo motor (b) a DC motor
23. 23.🦾 A servo program runs:
    angle = 40
    angle = angle + 60
    angle = angle − 50
    angle = angle − 10
    To what angle (in degrees) does the servo turn in the end?
24. 24.🦾 A servo turns 60° every 100 ms. How many milliseconds does it take to turn 60°?
25. 25.🦾 A servo turns 60° every 100 ms. How many milliseconds does it take to turn 150°?
26. 26.🦾 A servo arm points right at 0°, straight up at 90° and left at 180°. It is set to 45°. Where does the arm point? (a) points right (b) points left (c) points up and right (d) points up and left
27. 27.🦾 A servo moves from 150° to 80°. How many degrees does it turn?
28. 28.⚙️ DC motor or servo motor: which one reverses if wires swap? (a) a DC motor (b) a servo motor
29. 29.⚙️ A motor changes electrical energy into … (a) sound only (b) light (c) movement (d) water
30. 30.🦾 A servo program runs:
    angle = 160
    angle = angle − 30
    angle = angle − 10
    To what angle (in degrees) does the servo turn in the end?
31. 31.⚙️ DC motor or servo motor: which one drives the wheels? (a) a servo motor (b) a DC motor
32. 32.True or false: “drives the wheels” is true of a DC motor. (a) True (b) False
33. 33.🦾 A servo moves from 20° to 160°. How many degrees does it turn?
34. 34.⚙️ DC motor or servo motor: which one usually turns 0° to 180°? (a) a servo motor (b) a DC motor
35. 35.True or false: “spins faster with more V” is true of a DC motor. (a) True (b) False
36. 36.🦾 A servo moves from 0° to 30°. How many degrees does it turn?
37. 37.⚙️ DC motor or servo motor: which one moves an arm joint? (a) a servo motor (b) a DC motor
38. 38.⚙️ DC motor or servo motor: which one turns to an exact angle? (a) a servo motor (b) a DC motor
39. 39.🦾 A servo arm points right at 0°, straight up at 90° and left at 180°. It is set to 135°. Where does the arm point? (a) points up and right (b) points right (c) points up and left (d) points straight up
40. 40.🦾 A servo moves from 160° to 180°. How many degrees does it turn?

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