← DC motors and servo motors lesson New set →

Robotics Worksheet: DC and Servo Motors

Robotics lesson 12: DC motors and servo motors · Set 417 · 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.⚙️ A common servo can turn from 0° up to about … (a) 180° (b) 10° (c) 1800° (d) 18°
  2. 2.⚙️ A motor changes electrical energy into … (a) water (b) sound only (c) movement (d) light
  3. 3.🦾 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 up and right (b) points left (c) points straight up (d) points up and left
  4. 4.🦾 A servo moves from 100° to 40°. How many degrees does it turn?
  5. 5.True or false: “spins faster with more V” is true of a servo motor. (a) False (b) True
  6. 6.⚙️ DC motor or servo motor: which one has a signal wire? (a) a servo motor (b) a DC motor
  7. 7.🦾 A servo moves from 0° to 30°. How many degrees does it turn?
  8. 8.True or false: “has a signal wire” is true of a DC motor. (a) False (b) True
  9. 9.🦾 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 up and left (d) points left
  10. 10.🦾 A servo program runs:
    angle = 20
    angle = angle + 30
    angle = angle − 40
    angle = angle + 30
    To what angle (in degrees) does the servo turn in the end?
  11. 11.⚙️ DC motor or servo motor: which one reverses if wires swap? (a) a DC motor (b) a servo motor
  12. 12.True or false: “spins faster with more V” is true of a DC motor. (a) False (b) True
  13. 13.🦾 A servo program runs:
    angle = 50
    angle = angle + 60
    angle = angle + 50
    angle = angle − 10
    To what angle (in degrees) does the servo turn in the end?
  14. 14.True or false: “has just two wires” is true of a servo motor. (a) True (b) False
  15. 15.⚙️ DC motor or servo motor: which one spins round and round? (a) a DC motor (b) a servo motor
  16. 16.⚙️ DC motor or servo motor: which one has just two wires? (a) a DC motor (b) a servo motor
  17. 17.True or false: “drives the wheels” is true of a servo motor. (a) True (b) False
  18. 18.True or false: “drives the wheels” is true of a DC motor. (a) False (b) True
  19. 19.🦾 A servo program runs:
    angle = 180
    angle = angle − 30
    angle = angle − 50
    To what angle (in degrees) does the servo turn in the end?
  20. 20.🦾 A servo program runs:
    angle = 60
    angle = angle − 40
    angle = angle + 60
    angle = angle + 60
    To what angle (in degrees) does the servo turn in the end?
  21. 21.🦾 A servo program runs:
    angle = 10
    angle = angle + 40
    angle = angle + 60
    angle = angle − 10
    To what angle (in degrees) does the servo turn in the end?
  22. 22.⚙️ DC motor or servo motor: which one drives the wheels? (a) a DC motor (b) a servo motor
  23. 23.⚙️ DC motor or servo motor: which one moves an arm joint? (a) a DC motor (b) a servo motor
  24. 24.⚙️ Which motor is best for spinning a robot’s wheels round and round? (a) a servo motor (b) a DC motor (c) a light sensor (d) a buzzer
  25. 25.🦾 A servo program runs:
    angle = 80
    angle = angle + 10
    angle = angle + 10
    angle = angle − 30
    To what angle (in degrees) does the servo turn in the end?
  26. 26.🦾 A servo turns 60° every 100 ms. How many milliseconds does it take to turn 30°?
  27. 27.🦾 A servo moves from 150° to 70°. How many degrees does it turn?
  28. 28.🦾 A servo program runs:
    angle = 80
    angle = angle − 10
    angle = angle + 50
    angle = angle + 40
    To what angle (in degrees) does the servo turn in the end?
  29. 29.True or false: “spins round and round” is true of a DC motor. (a) False (b) True
  30. 30.🦾 A servo turns 60° every 100 ms. How many milliseconds does it take to turn 180°?
  31. 31.True or false: “usually turns 0° to 180°” is true of a servo motor. (a) True (b) False
  32. 32.True or false: “reverses if wires swap” is true of a servo motor. (a) False (b) True
  33. 33.🦾 A servo turns 60° every 100 ms. How many milliseconds does it take to turn 150°?
  34. 34.🦾 A servo program runs:
    angle = 150
    angle = angle − 50
    angle = angle + 20
    To what angle (in degrees) does the servo turn in the end?
  35. 35.🦾 A servo moves from 130° to 170°. How many degrees does it turn?
  36. 36.🦾 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 straight up (c) points up and left (d) points right
  37. 37.⚙️ DC motor or servo motor: which one usually turns 0° to 180°? (a) a servo motor (b) a DC motor
  38. 38.🦾 A servo program runs:
    angle = 40
    angle = angle + 60
    angle = angle + 30
    To what angle (in degrees) does the servo turn in the end?
  39. 39.True or false: “holds a set angle” is true of a servo motor. (a) False (b) True
  40. 40.🦾 A servo program runs:
    angle = 130
    angle = angle + 30
    angle = angle − 40
    angle = angle − 40
    angle = angle + 60
    To what angle (in degrees) does the servo turn in the end?

Answer key

  1. 180°
  2. movement
  3. points up and right
  4. 60
  5. False
  6. a servo motor
  7. 30
  8. False
  9. points right
  10. 40
  11. a DC motor
  12. True
  13. 150
  14. False
  15. a DC motor
  16. a DC motor
  17. False
  18. True
  19. 100
  20. 140
  21. 100
  22. a DC motor
  23. a servo motor
  24. a DC motor
  25. 70
  26. 50
  27. 80
  28. 160
  29. True
  30. 300
  31. True
  32. False
  33. 250
  34. 120
  35. 40
  36. points up and left
  37. a servo motor
  38. 130
  39. True
  40. 140

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