← DC motors and servo motors lesson New set →

Robotics Worksheet: DC and Servo Motors

Robotics lesson 12: DC motors and servo motors · Set 165 · 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 servo moves from 170° to 100°. How many degrees does it turn?
  2. 2.⚙️ Which motor is best for spinning a robot’s wheels round and round? (a) a light sensor (b) a servo motor (c) a DC motor (d) a buzzer
  3. 3.⚙️ DC motor or servo motor: which one has a signal wire? (a) a DC motor (b) a servo motor
  4. 4.True or false: “drives the wheels” is true of a servo motor. (a) True (b) False
  5. 5.True or false: “spins faster with more V” is true of a DC motor. (a) False (b) True
  6. 6.⚙️ A motor changes electrical energy into … (a) movement (b) sound only (c) water (d) light
  7. 7.🦾 A servo moves from 40° to 70°. How many degrees does it turn?
  8. 8.🦾 A servo program runs:
    angle = 60
    angle = angle − 50
    angle = angle + 20
    To what angle (in degrees) does the servo turn in the end?
  9. 9.🦾 A servo program runs:
    angle = 50
    angle = angle + 30
    angle = angle + 10
    To what angle (in degrees) does the servo turn in the end?
  10. 10.🦾 A servo moves from 10° to 120°. How many degrees does it turn?
  11. 11.🦾 A servo program runs:
    angle = 20
    angle = angle + 20
    angle = angle + 50
    angle = angle + 40
    angle = angle − 50
    To what angle (in degrees) does the servo turn in the end?
  12. 12.🦾 A servo program runs:
    angle = 40
    angle = angle + 10
    angle = angle − 40
    To what angle (in degrees) does the servo turn in the end?
  13. 13.True or false: “turns to an exact angle” is true of a DC motor. (a) False (b) True
  14. 14.⚙️ DC motor or servo motor: which one reverses if wires swap? (a) a servo motor (b) a DC motor
  15. 15.True or false: “holds a set angle” is true of a servo motor. (a) False (b) True
  16. 16.🦾 A servo program runs:
    angle = 90
    angle = angle + 40
    angle = angle − 50
    To what angle (in degrees) does the servo turn in the end?
  17. 17.🦾 A servo program runs:
    angle = 180
    angle = angle − 50
    angle = angle + 10
    To what angle (in degrees) does the servo turn in the end?
  18. 18.🦾 A servo program runs:
    angle = 70
    angle = angle − 10
    angle = angle − 30
    To what angle (in degrees) does the servo turn in the end?
  19. 19.🦾 A servo turns 60° every 100 ms. How many milliseconds does it take to turn 60°?
  20. 20.🦾 A servo moves from 140° to 50°. How many degrees does it turn?
  21. 21.⚙️ A common servo can turn from 0° up to about … (a) 18° (b) 10° (c) 180° (d) 1800°
  22. 22.True or false: “turns to an exact angle” is true of a servo motor. (a) True (b) False
  23. 23.🦾 A servo moves from 160° to 0°. How many degrees does it turn?
  24. 24.🦾 A servo program runs:
    angle = 120
    angle = angle − 10
    angle = angle + 60
    angle = angle − 20
    angle = angle − 50
    To what angle (in degrees) does the servo turn in the end?
  25. 25.True or false: “has just two wires” is true of a servo motor. (a) False (b) True
  26. 26.🦾 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 right (c) points left (d) points up and left
  27. 27.🦾 A servo moves from 10° to 180°. How many degrees does it turn?
  28. 28.🦾 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 left (b) points up and left (c) points straight up (d) points right
  29. 29.⚙️ DC motor or servo motor: which one turns to an exact angle? (a) a servo motor (b) a DC motor
  30. 30.⚙️ DC motor or servo motor: which one has just two wires? (a) a DC motor (b) a servo motor
  31. 31.True or false: “moves an arm joint” is true of a DC motor. (a) True (b) False
  32. 32.True or false: “reverses if wires swap” is true of a DC motor. (a) True (b) False
  33. 33.🦾 A servo turns 60° every 100 ms. How many milliseconds does it take to turn 120°?
  34. 34.⚙️ How do you make a DC motor spin the other way? (a) paint it red (b) shake it (c) swap its two wires (d) add more wheels
  35. 35.True or false: “moves an arm joint” is true of a servo motor. (a) False (b) True
  36. 36.🦾 A servo moves from 30° to 60°. How many degrees does it turn?
  37. 37.🦾 A servo program runs:
    angle = 100
    angle = angle − 20
    angle = angle + 20
    angle = angle + 10
    To what angle (in degrees) does the servo turn in the end?
  38. 38.🦾 A servo program runs:
    angle = 80
    angle = angle − 20
    angle = angle + 30
    angle = angle + 20
    angle = angle − 50
    To what angle (in degrees) does the servo turn in the end?
  39. 39.🦾 A servo program runs:
    angle = 0
    angle = angle + 40
    angle = angle + 50
    angle = angle − 10
    To what angle (in degrees) does the servo turn in the end?
  40. 40.⚙️ Which motor is best for turning a robot arm to exactly 45°? (a) a buzzer (b) a fan (c) a DC motor (d) a servo motor

Answer key

  1. 70
  2. a DC motor
  3. a servo motor
  4. False
  5. True
  6. movement
  7. 30
  8. 30
  9. 90
  10. 110
  11. 80
  12. 10
  13. False
  14. a DC motor
  15. True
  16. 80
  17. 140
  18. 30
  19. 100
  20. 90
  21. 180°
  22. True
  23. 160
  24. 100
  25. False
  26. points right
  27. 170
  28. points left
  29. a servo motor
  30. a DC motor
  31. False
  32. True
  33. 200
  34. swap its two wires
  35. True
  36. 30
  37. 110
  38. 60
  39. 80
  40. a servo motor

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