← DC motors and servo motors lesson New set →

Robotics Worksheet: DC and Servo Motors

Robotics lesson 12: DC motors and servo motors · Set 414 · 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.True or false: “spins faster with more V” is true of a servo motor. (a) False (b) True
  2. 2.⚙️ Which motor is best for spinning a robot’s wheels round and round? (a) a servo motor (b) a buzzer (c) a DC motor (d) a light sensor
  3. 3.True or false: “moves an arm joint” is true of a servo motor. (a) False (b) True
  4. 4.🦾 A servo program runs:
    angle = 110
    angle = angle − 30
    angle = angle − 10
    angle = angle + 10
    angle = angle + 20
    To what angle (in degrees) does the servo turn in the end?
  5. 5.⚙️ DC motor or servo motor: which one spins round and round? (a) a DC motor (b) a servo motor
  6. 6.🦾 A servo program runs:
    angle = 20
    angle = angle − 10
    angle = angle + 10
    angle = angle + 40
    angle = angle + 50
    To what angle (in degrees) does the servo turn in the end?
  7. 7.⚙️ A motor changes electrical energy into … (a) movement (b) light (c) sound only (d) water
  8. 8.🦾 A servo moves from 0° to 30°. How many degrees does it turn?
  9. 9.⚙️ Which motor is best for turning a robot arm to exactly 45°? (a) a DC motor (b) a buzzer (c) a servo motor (d) a fan
  10. 10.⚙️ DC motor or servo motor: which one drives the wheels? (a) a DC motor (b) a servo motor
  11. 11.True or false: “reverses if wires swap” is true of a DC motor. (a) False (b) True
  12. 12.🦾 A servo turns 60° every 100 ms. How many milliseconds does it take to turn 60°?
  13. 13.🦾 A servo turns 60° every 100 ms. How many milliseconds does it take to turn 180°?
  14. 14.🦾 A servo arm points right at 0°, straight up at 90° and left at 180°. It is set to 90°. Where does the arm point? (a) points right (b) points straight up (c) points up and left (d) points up and right
  15. 15.🦾 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 up and right (c) points straight up (d) points up and left
  16. 16.🦾 A servo moves from 50° to 10°. How many degrees does it turn?
  17. 17.🦾 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 straight up (b) points up and right (c) points up and left (d) points left
  18. 18.⚙️ A common servo can turn from 0° up to about … (a) 10° (b) 180° (c) 1800° (d) 18°
  19. 19.True or false: “moves an arm joint” is true of a DC motor. (a) True (b) False
  20. 20.True or false: “has a signal wire” is true of a DC motor. (a) True (b) False
  21. 21.🦾 A servo program runs:
    angle = 160
    angle = angle − 40
    angle = angle + 20
    angle = angle − 60
    To what angle (in degrees) does the servo turn in the end?
  22. 22.⚙️ DC motor or servo motor: which one reverses if wires swap? (a) a DC motor (b) a servo motor
  23. 23.True or false: “usually turns 0° to 180°” is true of a servo motor. (a) False (b) True
  24. 24.🦾 A servo program runs:
    angle = 120
    angle = angle − 10
    angle = angle − 50
    To what angle (in degrees) does the servo turn in the end?
  25. 25.🦾 A servo moves from 150° to 100°. How many degrees does it turn?
  26. 26.🦾 A servo moves from 130° to 30°. How many degrees does it turn?
  27. 27.🦾 A servo moves from 120° to 50°. How many degrees does it turn?
  28. 28.True or false: “has just two wires” is true of a servo motor. (a) True (b) False
  29. 29.🦾 A servo program runs:
    angle = 70
    angle = angle − 40
    angle = angle − 10
    angle = angle + 40
    To what angle (in degrees) does the servo turn in the end?
  30. 30.⚙️ DC motor or servo motor: which one spins faster with more V? (a) a servo motor (b) a DC motor
  31. 31.True or false: “holds a set angle” is true of a servo motor. (a) True (b) False
  32. 32.🦾 A servo program runs:
    angle = 0
    angle = angle + 30
    angle = angle + 10
    angle = angle + 30
    To what angle (in degrees) does the servo turn in the end?
  33. 33.🦾 A servo program runs:
    angle = 10
    angle = angle − 10
    angle = angle + 40
    angle = angle + 40
    To what angle (in degrees) does the servo turn in the end?
  34. 34.⚙️ DC motor or servo motor: which one has just two wires? (a) a DC motor (b) a servo motor
  35. 35.True or false: “drives the wheels” is true of a DC motor. (a) False (b) True
  36. 36.🦾 A servo program runs:
    angle = 110
    angle = angle + 10
    angle = angle − 20
    To what angle (in degrees) does the servo turn in the end?
  37. 37.🦾 A servo turns 60° every 100 ms. How many milliseconds does it take to turn 90°?
  38. 38.🦾 A servo moves from 170° to 120°. How many degrees does it turn?
  39. 39.True or false: “usually turns 0° to 180°” is true of a DC motor. (a) True (b) False
  40. 40.🦾 A servo program runs:
    angle = 100
    angle = angle − 30
    angle = angle − 40
    To what angle (in degrees) does the servo turn in the end?

Answer key

  1. False
  2. a DC motor
  3. True
  4. 100
  5. a DC motor
  6. 110
  7. movement
  8. 30
  9. a servo motor
  10. a DC motor
  11. True
  12. 100
  13. 300
  14. points straight up
  15. points up and right
  16. 40
  17. points left
  18. 180°
  19. False
  20. False
  21. 80
  22. a DC motor
  23. True
  24. 60
  25. 50
  26. 100
  27. 70
  28. False
  29. 60
  30. a DC motor
  31. True
  32. 70
  33. 80
  34. a DC motor
  35. True
  36. 100
  37. 150
  38. 50
  39. False
  40. 30

Free robotics lessons, practice and worksheets at talentjr.in/robotics-for-kids