← DC motors and servo motors lesson New set →

Robotics Worksheet: DC and Servo Motors

Robotics lesson 12: DC motors and servo motors · Set 64 · 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 DC motor (c) a buzzer (d) a fan
  2. 2.🦾 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 right (b) points up and left (c) points straight up (d) points right
  3. 3.🦾 A servo program runs:
    angle = 120
    angle = angle + 40
    angle = angle − 40
    To what angle (in degrees) does the servo turn in the end?
  4. 4.⚙️ Which motor is best for spinning a robot’s wheels round and round? (a) a buzzer (b) a light sensor (c) a DC motor (d) a servo motor
  5. 5.True or false: “usually turns 0° to 180°” is true of a servo motor. (a) False (b) True
  6. 6.True or false: “spins round and round” is true of a servo motor. (a) False (b) True
  7. 7.⚙️ DC motor or servo motor: which one turns to an exact angle? (a) a servo motor (b) a DC motor
  8. 8.⚙️ DC motor or servo motor: which one holds a set angle? (a) a servo motor (b) a DC motor
  9. 9.True or false: “reverses if wires swap” is true of a servo motor. (a) True (b) False
  10. 10.🦾 A servo program runs:
    angle = 80
    angle = angle + 10
    angle = angle − 20
    angle = angle − 10
    angle = angle − 20
    To what angle (in degrees) does the servo turn in the end?
  11. 11.🦾 A servo turns 60° every 100 ms. How many milliseconds does it take to turn 180°?
  12. 12.🦾 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 right (d) points left
  13. 13.🦾 A servo moves from 130° to 50°. How many degrees does it turn?
  14. 14.⚙️ A motor changes electrical energy into … (a) movement (b) light (c) water (d) sound only
  15. 15.🦾 A servo turns 60° every 100 ms. How many milliseconds does it take to turn 120°?
  16. 16.⚙️ DC motor or servo motor: which one spins faster with more V? (a) a DC motor (b) a servo motor
  17. 17.⚙️ DC motor or servo motor: which one spins round and round? (a) a servo motor (b) a DC motor
  18. 18.True or false: “drives the wheels” is true of a DC motor. (a) True (b) False
  19. 19.🦾 A servo program runs:
    angle = 180
    angle = angle − 30
    angle = angle − 40
    To what angle (in degrees) does the servo turn in the end?
  20. 20.🦾 A servo program runs:
    angle = 140
    angle = angle + 10
    angle = angle − 50
    To what angle (in degrees) does the servo turn in the end?
  21. 21.🦾 A servo program runs:
    angle = 40
    angle = angle + 50
    angle = angle − 10
    angle = angle + 30
    To what angle (in degrees) does the servo turn in the end?
  22. 22.True or false: “turns to an exact angle” is true of a servo motor. (a) True (b) False
  23. 23.True or false: “moves an arm joint” is true of a servo motor. (a) False (b) True
  24. 24.🦾 A servo turns 60° every 100 ms. How many milliseconds does it take to turn 30°?
  25. 25.True or false: “holds a set angle” is true of a servo motor. (a) False (b) True
  26. 26.🦾 A servo moves from 80° to 40°. How many degrees does it turn?
  27. 27.⚙️ A common servo can turn from 0° up to about … (a) 1800° (b) 180° (c) 18° (d) 10°
  28. 28.⚙️ DC motor or servo motor: which one has just two wires? (a) a DC motor (b) a servo motor
  29. 29.True or false: “moves an arm joint” is true of a DC motor. (a) True (b) False
  30. 30.🦾 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 straight up (b) points up and right (c) points right (d) points up and left
  31. 31.🦾 A servo turns 60° every 100 ms. How many milliseconds does it take to turn 60°?
  32. 32.🦾 A servo program runs:
    angle = 70
    angle = angle + 40
    angle = angle + 40
    angle = angle − 10
    angle = angle − 40
    To what angle (in degrees) does the servo turn in the end?
  33. 33.🦾 A servo moves from 120° to 110°. How many degrees does it turn?
  34. 34.True or false: “has a signal wire” is true of a servo motor. (a) True (b) False
  35. 35.🦾 A servo program runs:
    angle = 180
    angle = angle − 30
    angle = angle + 10
    angle = angle − 40
    angle = angle − 40
    To what angle (in degrees) does the servo turn in the end?
  36. 36.⚙️ DC motor or servo motor: which one reverses if wires swap? (a) a DC motor (b) a servo motor
  37. 37.🦾 A servo program runs:
    angle = 50
    angle = angle + 50
    angle = angle + 50
    angle = angle − 40
    To what angle (in degrees) does the servo turn in the end?
  38. 38.🦾 A servo moves from 40° to 150°. How many degrees does it turn?
  39. 39.🦾 A servo moves from 10° to 40°. How many degrees does it turn?
  40. 40.🦾 A servo program runs:
    angle = 50
    angle = angle + 30
    angle = angle − 30
    angle = angle − 10
    To what angle (in degrees) does the servo turn in the end?

Answer key

  1. a servo motor
  2. points right
  3. 120
  4. a DC motor
  5. True
  6. False
  7. a servo motor
  8. a servo motor
  9. False
  10. 40
  11. 300
  12. points left
  13. 80
  14. movement
  15. 200
  16. a DC motor
  17. a DC motor
  18. True
  19. 110
  20. 100
  21. 110
  22. True
  23. True
  24. 50
  25. True
  26. 40
  27. 180°
  28. a DC motor
  29. False
  30. points up and left
  31. 100
  32. 100
  33. 10
  34. True
  35. 80
  36. a DC motor
  37. 110
  38. 110
  39. 30
  40. 40

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