← DC motors and servo motors lesson New set →

Robotics Worksheet: DC and Servo Motors

Robotics lesson 12: DC motors and servo motors · Set 339 · 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 spinning a robot’s wheels round and round? (a) a buzzer (b) a servo motor (c) a DC motor (d) a light sensor
  2. 2.🦾 A servo turns 60° every 100 ms. How many milliseconds does it take to turn 90°?
  3. 3.🦾 A servo program runs:
    angle = 160
    angle = angle − 40
    angle = angle − 10
    angle = angle + 10
    angle = angle + 20
    To what angle (in degrees) does the servo turn in the end?
  4. 4.⚙️ DC motor or servo motor: which one drives the wheels? (a) a DC motor (b) a servo motor
  5. 5.⚙️ A motor changes electrical energy into … (a) sound only (b) movement (c) water (d) light
  6. 6.🦾 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 straight up (c) points up and right (d) points up and left
  7. 7.🦾 A servo turns 60° every 100 ms. How many milliseconds does it take to turn 150°?
  8. 8.True or false: “reverses if wires swap” is true of a servo motor. (a) True (b) False
  9. 9.⚙️ DC motor or servo motor: which one spins faster with more V? (a) a DC motor (b) a servo motor
  10. 10.True or false: “turns to an exact angle” is true of a DC motor. (a) True (b) False
  11. 11.⚙️ DC motor or servo motor: which one spins round and round? (a) a servo motor (b) a DC motor
  12. 12.🦾 A servo moves from 140° to 50°. How many degrees does it turn?
  13. 13.🦾 A servo moves from 90° to 20°. How many degrees does it turn?
  14. 14.⚙️ DC motor or servo motor: which one moves an arm joint? (a) a DC motor (b) a servo motor
  15. 15.True or false: “usually turns 0° to 180°” is true of a servo motor. (a) False (b) True
  16. 16.🦾 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 left (b) points right (c) points up and right (d) points left
  17. 17.🦾 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 up and right (b) points straight up (c) points right (d) points up and left
  18. 18.⚙️ DC motor or servo motor: which one has a signal wire? (a) a DC motor (b) a servo motor
  19. 19.🦾 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 up and left (d) points straight up
  20. 20.🦾 A servo turns 60° every 100 ms. How many milliseconds does it take to turn 60°?
  21. 21.True or false: “spins faster with more V” is true of a servo motor. (a) False (b) True
  22. 22.⚙️ DC motor or servo motor: which one usually turns 0° to 180°? (a) a servo motor (b) a DC motor
  23. 23.True or false: “spins round and round” is true of a servo motor. (a) True (b) False
  24. 24.True or false: “has a signal wire” is true of a DC motor. (a) True (b) False
  25. 25.🦾 A servo moves from 180° to 140°. How many degrees does it turn?
  26. 26.True or false: “drives the wheels” is true of a DC motor. (a) False (b) True
  27. 27.🦾 A servo program runs:
    angle = 100
    angle = angle − 10
    angle = angle + 60
    angle = angle − 50
    angle = angle − 30
    To what angle (in degrees) does the servo turn in the end?
  28. 28.🦾 A servo moves from 80° to 150°. How many degrees does it turn?
  29. 29.🦾 A servo program runs:
    angle = 20
    angle = angle + 30
    angle = angle − 10
    To what angle (in degrees) does the servo turn in the end?
  30. 30.True or false: “has just two wires” is true of a servo motor. (a) True (b) False
  31. 31.True or false: “moves an arm joint” is true of a DC motor. (a) True (b) False
  32. 32.True or false: “holds a set angle” is true of a servo motor. (a) False (b) True
  33. 33.⚙️ How do you make a DC motor spin the other way? (a) swap its two wires (b) shake it (c) paint it red (d) add more wheels
  34. 34.🦾 A servo program runs:
    angle = 50
    angle = angle + 10
    angle = angle − 40
    angle = angle + 40
    angle = angle − 50
    To what angle (in degrees) does the servo turn in the end?
  35. 35.⚙️ DC motor or servo motor: which one turns to an exact angle? (a) a DC motor (b) a servo motor
  36. 36.🦾 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 right (c) points left (d) points up and right
  37. 37.🦾 A servo turns 60° every 100 ms. How many milliseconds does it take to turn 120°?
  38. 38.True or false: “moves an arm joint” is true of a servo motor. (a) False (b) True
  39. 39.🦾 A servo moves from 70° to 140°. How many degrees does it turn?
  40. 40.⚙️ DC motor or servo motor: which one reverses if wires swap? (a) a servo motor (b) a DC motor

Answer key

  1. a DC motor
  2. 150
  3. 140
  4. a DC motor
  5. movement
  6. points right
  7. 250
  8. False
  9. a DC motor
  10. False
  11. a DC motor
  12. 90
  13. 70
  14. a servo motor
  15. True
  16. points up and left
  17. points straight up
  18. a servo motor
  19. points up and right
  20. 100
  21. False
  22. a servo motor
  23. False
  24. False
  25. 40
  26. True
  27. 70
  28. 70
  29. 40
  30. False
  31. False
  32. True
  33. swap its two wires
  34. 10
  35. a servo motor
  36. points left
  37. 200
  38. True
  39. 70
  40. a DC motor

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