← DC motors and servo motors lesson New set →

Robotics Worksheet: DC and Servo Motors

Robotics lesson 12: DC motors and servo motors · Set 219 · 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) 1800° (b) 10° (c) 180° (d) 18°
  2. 2.True or false: “turns to an exact angle” is true of a servo motor. (a) False (b) True
  3. 3.True or false: “usually turns 0° to 180°” is true of a DC motor. (a) False (b) True
  4. 4.🦾 A servo turns 60° every 100 ms. How many milliseconds does it take to turn 30°?
  5. 5.🦾 A servo program runs:
    angle = 90
    angle = angle − 30
    angle = angle − 10
    angle = angle + 50
    To what angle (in degrees) does the servo turn in the end?
  6. 6.⚙️ DC motor or servo motor: which one usually turns 0° to 180°? (a) a DC motor (b) a servo motor
  7. 7.🦾 A servo program runs:
    angle = 30
    angle = angle + 40
    angle = angle − 60
    angle = angle + 30
    angle = angle − 10
    To what angle (in degrees) does the servo turn in the end?
  8. 8.🦾 A servo moves from 120° to 90°. How many degrees does it turn?
  9. 9.⚙️ DC motor or servo motor: which one reverses if wires swap? (a) a DC motor (b) a servo motor
  10. 10.True or false: “holds a set angle” is true of a DC motor. (a) True (b) False
  11. 11.🦾 A servo turns 60° every 100 ms. How many milliseconds does it take to turn 90°?
  12. 12.🦾 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 right (d) points straight up
  13. 13.⚙️ DC motor or servo motor: which one spins faster with more V? (a) a DC motor (b) a servo motor
  14. 14.🦾 A servo turns 60° every 100 ms. How many milliseconds does it take to turn 150°?
  15. 15.⚙️ DC motor or servo motor: which one holds a set angle? (a) a DC motor (b) a servo motor
  16. 16.🦾 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 straight up (c) points up and left (d) points left
  17. 17.⚙️ A motor changes electrical energy into … (a) light (b) water (c) sound only (d) movement
  18. 18.🦾 A servo moves from 160° to 80°. How many degrees does it turn?
  19. 19.🦾 A servo moves from 80° to 70°. How many degrees does it turn?
  20. 20.🦾 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 left (b) points up and right (c) points right (d) points straight up
  21. 21.⚙️ Which motor is best for spinning a robot’s wheels round and round? (a) a servo motor (b) a light sensor (c) a DC motor (d) a buzzer
  22. 22.True or false: “spins round and round” is true of a DC motor. (a) True (b) False
  23. 23.⚙️ DC motor or servo motor: which one has just two wires? (a) a servo motor (b) a DC motor
  24. 24.🦾 A servo moves from 40° to 130°. How many degrees does it turn?
  25. 25.⚙️ DC motor or servo motor: which one has a signal wire? (a) a servo motor (b) a DC motor
  26. 26.🦾 A servo program runs:
    angle = 70
    angle = angle − 20
    angle = angle − 40
    angle = angle + 60
    To what angle (in degrees) does the servo turn in the end?
  27. 27.⚙️ How do you make a DC motor spin the other way? (a) shake it (b) add more wheels (c) paint it red (d) swap its two wires
  28. 28.🦾 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 left (c) points up and right (d) points up and left
  29. 29.⚙️ Which motor is best for turning a robot arm to exactly 45°? (a) a buzzer (b) a DC motor (c) a servo motor (d) a fan
  30. 30.🦾 A servo moves from 50° to 110°. How many degrees does it turn?
  31. 31.🦾 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 right (b) points left (c) points straight up (d) points right
  32. 32.True or false: “reverses if wires swap” is true of a DC motor. (a) True (b) False
  33. 33.🦾 A servo program runs:
    angle = 90
    angle = angle + 20
    angle = angle − 40
    To what angle (in degrees) does the servo turn in the end?
  34. 34.True or false: “drives the wheels” is true of a DC motor. (a) True (b) False
  35. 35.🦾 A servo moves from 180° to 120°. How many degrees does it turn?
  36. 36.🦾 A servo turns 60° every 100 ms. How many milliseconds does it take to turn 60°?
  37. 37.🦾 A servo turns 60° every 100 ms. How many milliseconds does it take to turn 120°?
  38. 38.True or false: “spins faster with more V” is true of a DC motor. (a) True (b) False
  39. 39.🦾 A servo program runs:
    angle = 160
    angle = angle − 50
    angle = angle − 20
    To what angle (in degrees) does the servo turn in the end?
  40. 40.True or false: “drives the wheels” is true of a servo motor. (a) False (b) True

Answer key

  1. 180°
  2. True
  3. False
  4. 50
  5. 100
  6. a servo motor
  7. 30
  8. 30
  9. a DC motor
  10. False
  11. 150
  12. points right
  13. a DC motor
  14. 250
  15. a servo motor
  16. points up and right
  17. movement
  18. 80
  19. 10
  20. points straight up
  21. a DC motor
  22. True
  23. a DC motor
  24. 90
  25. a servo motor
  26. 70
  27. swap its two wires
  28. points up and left
  29. a servo motor
  30. 60
  31. points left
  32. True
  33. 70
  34. True
  35. 60
  36. 100
  37. 200
  38. True
  39. 90
  40. False

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