← DC motors and servo motors lesson New set →

Robotics Worksheet: DC and Servo Motors

Robotics lesson 12: DC motors and servo motors · Set 667 · 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.⚙️ DC motor or servo motor: which one drives the wheels? (a) a DC motor (b) a servo motor
  2. 2.🦾 A servo moves from 90° to 140°. How many degrees does it turn?
  3. 3.⚙️ DC motor or servo motor: which one usually turns 0° to 180°? (a) a DC motor (b) a servo motor
  4. 4.🦾 A servo program runs:
    angle = 120
    angle = angle − 50
    angle = angle − 40
    angle = angle + 10
    angle = angle − 30
    To what angle (in degrees) does the servo turn in the end?
  5. 5.🦾 A servo turns 60° every 100 ms. How many milliseconds does it take to turn 180°?
  6. 6.⚙️ DC motor or servo motor: which one spins round and round? (a) a DC motor (b) a servo motor
  7. 7.🦾 A servo moves from 160° to 70°. How many degrees does it turn?
  8. 8.🦾 A servo moves from 150° to 180°. How many degrees does it turn?
  9. 9.🦾 A servo turns 60° every 100 ms. How many milliseconds does it take to turn 60°?
  10. 10.True or false: “reverses if wires swap” is true of a servo motor. (a) True (b) False
  11. 11.🦾 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 right (b) points straight up (c) points left (d) points up and left
  12. 12.True or false: “drives the wheels” is true of a servo motor. (a) False (b) True
  13. 13.True or false: “holds a set angle” is true of a DC motor. (a) True (b) False
  14. 14.True or false: “reverses if wires swap” is true of a DC motor. (a) True (b) False
  15. 15.🦾 A servo moves from 90° to 130°. How many degrees does it turn?
  16. 16.⚙️ A common servo can turn from 0° up to about … (a) 180° (b) 18° (c) 1800° (d) 10°
  17. 17.⚙️ Which motor is best for turning a robot arm to exactly 45°? (a) a servo motor (b) a fan (c) a DC motor (d) a buzzer
  18. 18.True or false: “turns to an exact angle” is true of a DC motor. (a) True (b) False
  19. 19.⚙️ A motor changes electrical energy into … (a) water (b) light (c) movement (d) sound only
  20. 20.⚙️ Which motor is best for spinning a robot’s wheels round and round? (a) a servo motor (b) a buzzer (c) a DC motor (d) a light sensor
  21. 21.True or false: “spins round and round” is true of a servo motor. (a) False (b) True
  22. 22.🦾 A servo turns 60° every 100 ms. How many milliseconds does it take to turn 150°?
  23. 23.⚙️ DC motor or servo motor: which one holds a set angle? (a) a DC motor (b) a servo motor
  24. 24.🦾 A servo program runs:
    angle = 140
    angle = angle + 40
    angle = angle − 40
    To what angle (in degrees) does the servo turn in the end?
  25. 25.🦾 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
  26. 26.🦾 A servo turns 60° every 100 ms. How many milliseconds does it take to turn 30°?
  27. 27.⚙️ DC motor or servo motor: which one spins faster with more V? (a) a servo motor (b) a DC motor
  28. 28.⚙️ How do you make a DC motor spin the other way? (a) paint it red (b) add more wheels (c) shake it (d) swap its two wires
  29. 29.🦾 A servo program runs:
    angle = 180
    angle = angle − 20
    angle = angle − 50
    To what angle (in degrees) does the servo turn in the end?
  30. 30.🦾 A servo program runs:
    angle = 30
    angle = angle − 10
    angle = angle + 40
    angle = angle + 10
    angle = angle + 30
    To what angle (in degrees) does the servo turn in the end?
  31. 31.🦾 A servo program runs:
    angle = 50
    angle = angle + 60
    angle = angle + 30
    angle = angle + 20
    angle = angle − 40
    To what angle (in degrees) does the servo turn in the end?
  32. 32.⚙️ DC motor or servo motor: which one turns to an exact angle? (a) a DC motor (b) a servo motor
  33. 33.⚙️ DC motor or servo motor: which one has a signal wire? (a) a DC motor (b) a servo motor
  34. 34.🦾 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 left (b) points straight up (c) points up and right (d) points right
  35. 35.True or false: “turns to an exact angle” is true of a servo motor. (a) False (b) True
  36. 36.True or false: “drives the wheels” is true of a DC motor. (a) False (b) True
  37. 37.🦾 A servo moves from 70° to 100°. How many degrees does it turn?
  38. 38.True or false: “has just two wires” is true of a servo motor. (a) True (b) False
  39. 39.True or false: “has just two wires” is true of a DC motor. (a) False (b) True
  40. 40.🦾 A servo program runs:
    angle = 40
    angle = angle + 30
    angle = angle + 10
    angle = angle + 10
    angle = angle + 50
    To what angle (in degrees) does the servo turn in the end?

Answer key

  1. a DC motor
  2. 50
  3. a servo motor
  4. 10
  5. 300
  6. a DC motor
  7. 90
  8. 30
  9. 100
  10. False
  11. points up and left
  12. False
  13. False
  14. True
  15. 40
  16. 180°
  17. a servo motor
  18. False
  19. movement
  20. a DC motor
  21. False
  22. 250
  23. a servo motor
  24. 140
  25. points right
  26. 50
  27. a DC motor
  28. swap its two wires
  29. 110
  30. 100
  31. 120
  32. a servo motor
  33. a servo motor
  34. points straight up
  35. True
  36. True
  37. 30
  38. False
  39. True
  40. 140

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