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Robotics Worksheet: DC and Servo Motors

Robotics lesson 12: DC motors and servo motors · Set 324 · 40 questions
TalentJR

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.

NameDateTime takenScore ___ / 40
  1. 1.⚙️ Which motor is best for turning a robot arm to exactly 45°? (a) a servo motor (b) a fan (c) a DC motor (d) a buzzer
  2. 2.⚙️ DC motor or servo motor: which one usually turns 0° to 180°? (a) a servo motor (b) a DC motor
  3. 3.True or false: “has a signal wire” is true of a servo motor. (a) True (b) False
  4. 4.🦾 A servo program runs:
    angle = 110
    angle = angle − 30
    angle = angle − 60
    angle = angle − 10
    angle = angle + 30
    To what angle (in degrees) does the servo turn in the end?
  5. 5.⚙️ A common servo can turn from 0° up to about … (a) 18° (b) 180° (c) 1800° (d) 10°
  6. 6.True or false: “spins round and round” is true of a DC motor. (a) False (b) True
  7. 7.⚙️ DC motor or servo motor: which one turns to an exact angle? (a) a DC motor (b) a servo motor
  8. 8.⚙️ DC motor or servo motor: which one has just two wires? (a) a DC motor (b) a servo motor
  9. 9.🦾 A servo moves from 150° to 110°. How many degrees does it turn?
  10. 10.True or false: “drives the wheels” is true of a servo motor. (a) False (b) True
  11. 11.🦾 A servo program runs:
    angle = 60
    angle = angle − 20
    angle = angle + 20
    angle = angle − 10
    angle = angle − 40
    To what angle (in degrees) does the servo turn in the end?
  12. 12.True or false: “spins round and round” is true of a servo motor. (a) False (b) True
  13. 13.🦾 A servo moves from 70° to 30°. How many degrees does it turn?
  14. 14.🦾 A servo program runs:
    angle = 60
    angle = angle + 40
    angle = angle + 20
    angle = angle − 60
    To what angle (in degrees) does the servo turn in the end?
  15. 15.🦾 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 left (c) points up and left (d) points straight up
  16. 16.🦾 A servo program runs:
    angle = 110
    angle = angle − 10
    angle = angle + 60
    angle = angle − 20
    To what angle (in degrees) does the servo turn in the end?
  17. 17.True or false: “holds a set angle” is true of a DC motor. (a) False (b) True
  18. 18.🦾 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 right (b) points up and right (c) points straight up (d) points left
  19. 19.🦾 A servo moves from 170° to 100°. How many degrees does it turn?
  20. 20.🦾 A servo moves from 90° to 130°. How many degrees does it turn?
  21. 21.⚙️ How do you make a DC motor spin the other way? (a) paint it red (b) swap its two wires (c) shake it (d) add more wheels
  22. 22.🦾 A servo turns 60° every 100 ms. How many milliseconds does it take to turn 150°?
  23. 23.True or false: “spins faster with more V” is true of a DC motor. (a) True (b) False
  24. 24.True or false: “usually turns 0° to 180°” is true of a servo motor. (a) False (b) True
  25. 25.⚙️ DC motor or servo motor: which one holds a set angle? (a) a servo motor (b) a DC motor
  26. 26.True or false: “drives the wheels” is true of a DC motor. (a) True (b) False
  27. 27.⚙️ DC motor or servo motor: which one spins faster with more V? (a) a servo motor (b) a DC motor
  28. 28.⚙️ Which motor is best for spinning a robot’s wheels round and round? (a) a DC motor (b) a buzzer (c) a light sensor (d) a servo motor
  29. 29.True or false: “spins faster with more V” is true of a servo motor. (a) True (b) False
  30. 30.🦾 A servo moves from 70° to 60°. How many degrees does it turn?
  31. 31.🦾 A servo program runs:
    angle = 10
    angle = angle + 20
    angle = angle + 40
    To what angle (in degrees) does the servo turn in the end?
  32. 32.True or false: “has just two wires” is true of a DC motor. (a) False (b) True
  33. 33.🦾 A servo program runs:
    angle = 60
    angle = angle − 30
    angle = angle + 60
    To what angle (in degrees) does the servo turn in the end?
  34. 34.🦾 A servo program runs:
    angle = 170
    angle = angle − 10
    angle = angle − 10
    angle = angle + 10
    angle = angle − 40
    To what angle (in degrees) does the servo turn in the end?
  35. 35.🦾 A servo moves from 80° to 60°. How many degrees does it turn?
  36. 36.🦾 A servo turns 60° every 100 ms. How many milliseconds does it take to turn 120°?
  37. 37.🦾 A servo program runs:
    angle = 180
    angle = angle − 30
    angle = angle − 60
    To what angle (in degrees) does the servo turn in the end?
  38. 38.🦾 A servo program runs:
    angle = 150
    angle = angle − 60
    angle = angle + 20
    To what angle (in degrees) does the servo turn in the end?
  39. 39.⚙️ DC motor or servo motor: which one has a signal wire? (a) a DC motor (b) a servo motor
  40. 40.🦾 A servo program runs:
    angle = 30
    angle = angle + 60
    angle = angle − 10
    angle = angle − 60
    To what angle (in degrees) does the servo turn in the end?

Answer key

  1. a servo motor
  2. a servo motor
  3. True
  4. 40
  5. 180°
  6. True
  7. a servo motor
  8. a DC motor
  9. 40
  10. False
  11. 10
  12. False
  13. 40
  14. 60
  15. points up and left
  16. 140
  17. False
  18. points right
  19. 70
  20. 40
  21. swap its two wires
  22. 250
  23. True
  24. True
  25. a servo motor
  26. True
  27. a DC motor
  28. a DC motor
  29. False
  30. 10
  31. 70
  32. True
  33. 90
  34. 120
  35. 20
  36. 200
  37. 90
  38. 110
  39. a servo motor
  40. 20

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