← DC motors and servo motors lesson New set →

Robotics Worksheet: DC and Servo Motors

Robotics lesson 12: DC motors and servo motors · Set 589 · 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 100° to 120°. How many degrees does it turn?
  2. 2.🦾 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 up and right (c) points straight up (d) points left
  3. 3.⚙️ Which motor is best for spinning a robot’s wheels round and round? (a) a light sensor (b) a servo motor (c) a buzzer (d) a DC motor
  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 = 50
    angle = angle − 40
    angle = angle + 50
    angle = angle − 50
    To what angle (in degrees) does the servo turn in the end?
  6. 6.⚙️ DC motor or servo motor: which one spins faster with more V? (a) a DC motor (b) a servo motor
  7. 7.True or false: “has a signal wire” is true of a servo motor. (a) False (b) True
  8. 8.⚙️ DC motor or servo motor: which one drives the wheels? (a) a DC motor (b) a servo motor
  9. 9.🦾 A servo program runs:
    angle = 60
    angle = angle − 30
    angle = angle + 20
    angle = angle − 50
    To what angle (in degrees) does the servo turn in the end?
  10. 10.⚙️ DC motor or servo motor: which one reverses if wires swap? (a) a DC motor (b) a servo motor
  11. 11.⚙️ DC motor or servo motor: which one usually turns 0° to 180°? (a) a DC motor (b) a servo motor
  12. 12.⚙️ A common servo can turn from 0° up to about … (a) 18° (b) 10° (c) 1800° (d) 180°
  13. 13.🦾 A servo program runs:
    angle = 20
    angle = angle + 40
    angle = angle + 60
    To what angle (in degrees) does the servo turn in the end?
  14. 14.🦾 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 right (b) points left (c) points up and left (d) points straight up
  15. 15.🦾 A servo moves from 50° to 20°. How many degrees does it turn?
  16. 16.🦾 A servo program runs:
    angle = 70
    angle = angle − 20
    angle = angle − 30
    To what angle (in degrees) does the servo turn in the end?
  17. 17.🦾 A servo turns 60° every 100 ms. How many milliseconds does it take to turn 120°?
  18. 18.True or false: “spins faster with more V” is true of a servo motor. (a) True (b) False
  19. 19.True or false: “drives the wheels” is true of a DC motor. (a) True (b) False
  20. 20.🦾 A servo moves from 40° to 10°. How many degrees does it turn?
  21. 21.⚙️ How do you make a DC motor spin the other way? (a) shake it (b) paint it red (c) swap its two wires (d) add more wheels
  22. 22.🦾 A servo turns 60° every 100 ms. How many milliseconds does it take to turn 180°?
  23. 23.True or false: “has just two wires” is true of a DC motor. (a) True (b) False
  24. 24.True or false: “holds a set angle” is true of a DC motor. (a) False (b) True
  25. 25.⚙️ DC motor or servo motor: which one holds a set angle? (a) a servo motor (b) a DC motor
  26. 26.⚙️ A motor changes electrical energy into … (a) light (b) water (c) movement (d) sound only
  27. 27.True or false: “spins faster with more V” is true of a DC motor. (a) False (b) True
  28. 28.⚙️ DC motor or servo motor: which one spins round and round? (a) a DC motor (b) a servo motor
  29. 29.🦾 A servo program runs:
    angle = 180
    angle = angle − 10
    angle = angle − 20
    angle = angle − 50
    angle = angle − 30
    To what angle (in degrees) does the servo turn in the end?
  30. 30.🦾 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 left (b) points up and right (c) points left (d) points right
  31. 31.True or false: “turns to an exact angle” is true of a DC motor. (a) True (b) False
  32. 32.True or false: “drives the wheels” is true of a servo motor. (a) True (b) False
  33. 33.🦾 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 left
  34. 34.True or false: “holds a set angle” is true of a servo motor. (a) True (b) False
  35. 35.🦾 A servo moves from 0° to 180°. How many degrees does it turn?
  36. 36.⚙️ DC motor or servo motor: which one moves an arm joint? (a) a DC motor (b) a servo motor
  37. 37.⚙️ DC motor or servo motor: which one turns to an exact angle? (a) a servo motor (b) a DC motor
  38. 38.True or false: “usually turns 0° to 180°” is true of a servo motor. (a) False (b) True
  39. 39.True or false: “has a signal wire” is true of a DC motor. (a) False (b) True
  40. 40.🦾 A servo program runs:
    angle = 150
    angle = angle − 50
    angle = angle + 20
    angle = angle + 30
    To what angle (in degrees) does the servo turn in the end?

Answer key

  1. 20
  2. points up and left
  3. a DC motor
  4. 50
  5. 10
  6. a DC motor
  7. True
  8. a DC motor
  9. 0
  10. a DC motor
  11. a servo motor
  12. 180°
  13. 120
  14. points left
  15. 30
  16. 20
  17. 200
  18. False
  19. True
  20. 30
  21. swap its two wires
  22. 300
  23. True
  24. False
  25. a servo motor
  26. movement
  27. True
  28. a DC motor
  29. 70
  30. points right
  31. False
  32. False
  33. points up and right
  34. True
  35. 180
  36. a servo motor
  37. a servo motor
  38. True
  39. False
  40. 150

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