← DC motors and servo motors lesson New set →

Robotics Worksheet: DC and Servo Motors

Robotics lesson 12: DC motors and servo motors · Set 747 · 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 90° to 10°. How many degrees does it turn?
  2. 2.True or false: “spins faster with more V” is true of a servo motor. (a) True (b) False
  3. 3.⚙️ A common servo can turn from 0° up to about … (a) 18° (b) 180° (c) 1800° (d) 10°
  4. 4.⚙️ A motor changes electrical energy into … (a) light (b) water (c) sound only (d) movement
  5. 5.⚙️ Which motor is best for turning a robot arm to exactly 45°? (a) a fan (b) a servo motor (c) a buzzer (d) a DC motor
  6. 6.🦾 A servo moves from 160° to 0°. How many degrees does it turn?
  7. 7.🦾 A servo program runs:
    angle = 40
    angle = angle + 10
    angle = angle − 30
    angle = angle + 20
    To what angle (in degrees) does the servo turn in the end?
  8. 8.🦾 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 straight up (b) points right (c) points up and left (d) points left
  9. 9.🦾 A servo program runs:
    angle = 100
    angle = angle − 20
    angle = angle + 50
    angle = angle − 20
    To what angle (in degrees) does the servo turn in the end?
  10. 10.🦾 A servo turns 60° every 100 ms. How many milliseconds does it take to turn 30°?
  11. 11.⚙️ How do you make a DC motor spin the other way? (a) swap its two wires (b) paint it red (c) add more wheels (d) shake it
  12. 12.🦾 A servo moves from 20° to 170°. How many degrees does it turn?
  13. 13.🦾 A servo moves from 110° to 10°. How many degrees does it turn?
  14. 14.🦾 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 straight up (d) points up and left
  15. 15.True or false: “holds a set angle” is true of a servo motor. (a) True (b) False
  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 left (b) points right (c) points up and right (d) points straight up
  17. 17.⚙️ DC motor or servo motor: which one spins faster with more V? (a) a servo motor (b) a DC motor
  18. 18.🦾 A servo program runs:
    angle = 100
    angle = angle − 10
    angle = angle − 50
    To what angle (in degrees) does the servo turn in the end?
  19. 19.🦾 A servo moves from 150° to 160°. How many degrees does it turn?
  20. 20.True or false: “spins round and round” is true of a DC motor. (a) True (b) False
  21. 21.True or false: “has a signal wire” is true of a DC motor. (a) False (b) True
  22. 22.⚙️ DC motor or servo motor: which one has a signal wire? (a) a DC motor (b) a servo motor
  23. 23.⚙️ DC motor or servo motor: which one has just two wires? (a) a servo motor (b) a DC motor
  24. 24.True or false: “spins faster with more V” is true of a DC motor. (a) True (b) False
  25. 25.True or false: “usually turns 0° to 180°” is true of a servo motor. (a) False (b) True
  26. 26.🦾 A servo program runs:
    angle = 80
    angle = angle − 10
    angle = angle + 20
    To what angle (in degrees) does the servo turn in the end?
  27. 27.🦾 A servo moves from 10° to 60°. How many degrees does it turn?
  28. 28.🦾 A servo moves from 0° to 140°. How many degrees does it turn?
  29. 29.🦾 A servo turns 60° every 100 ms. How many milliseconds does it take to turn 150°?
  30. 30.🦾 A servo program runs:
    angle = 30
    angle = angle − 30
    angle = angle + 30
    angle = angle + 40
    angle = angle − 30
    To what angle (in degrees) does the servo turn in the end?
  31. 31.⚙️ DC motor or servo motor: which one turns to an exact angle? (a) a DC motor (b) a servo motor
  32. 32.🦾 A servo program runs:
    angle = 70
    angle = angle − 40
    angle = angle + 10
    To what angle (in degrees) does the servo turn in the end?
  33. 33.🦾 A servo moves from 60° to 110°. How many degrees does it turn?
  34. 34.🦾 A servo program runs:
    angle = 150
    angle = angle − 40
    angle = angle − 60
    angle = angle + 50
    angle = angle + 50
    To what angle (in degrees) does the servo turn in the end?
  35. 35.🦾 A servo moves from 110° to 60°. How many degrees does it turn?
  36. 36.True or false: “turns to an exact angle” is true of a servo motor. (a) False (b) True
  37. 37.True or false: “moves an arm joint” is true of a DC motor. (a) False (b) True
  38. 38.True or false: “usually turns 0° to 180°” is true of a DC motor. (a) True (b) False
  39. 39.🦾 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 left (b) points up and left (c) points straight up (d) points right
  40. 40.⚙️ DC motor or servo motor: which one reverses if wires swap? (a) a servo motor (b) a DC motor

Answer key

  1. 80
  2. False
  3. 180°
  4. movement
  5. a servo motor
  6. 160
  7. 40
  8. points straight up
  9. 110
  10. 50
  11. swap its two wires
  12. 150
  13. 100
  14. points right
  15. True
  16. points up and right
  17. a DC motor
  18. 40
  19. 10
  20. True
  21. False
  22. a servo motor
  23. a DC motor
  24. True
  25. True
  26. 90
  27. 50
  28. 140
  29. 250
  30. 40
  31. a servo motor
  32. 40
  33. 50
  34. 150
  35. 50
  36. True
  37. False
  38. False
  39. points up and left
  40. a DC motor

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