← DC motors and servo motors lesson New set →

Robotics Worksheet: DC and Servo Motors

Robotics lesson 12: DC motors and servo motors · Set 932 · 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 program runs:
    angle = 60
    angle = angle + 60
    angle = angle + 60
    angle = angle − 50
    To what angle (in degrees) does the servo turn in the end?
  2. 2.True or false: “spins faster with more V” is true of a DC motor. (a) False (b) True
  3. 3.⚙️ DC motor or servo motor: which one moves an arm joint? (a) a servo motor (b) a DC motor
  4. 4.⚙️ DC motor or servo motor: which one spins faster with more V? (a) a DC motor (b) a servo motor
  5. 5.🦾 A servo program runs:
    angle = 160
    angle = angle − 40
    angle = angle − 60
    angle = angle − 40
    To what angle (in degrees) does the servo turn in the end?
  6. 6.🦾 A servo turns 60° every 100 ms. How many milliseconds does it take to turn 90°?
  7. 7.🦾 A servo moves from 140° to 20°. How many degrees does it turn?
  8. 8.⚙️ 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
  9. 9.🦾 A servo moves from 90° to 130°. How many degrees does it turn?
  10. 10.🦾 A servo program runs:
    angle = 140
    angle = angle − 50
    angle = angle + 40
    angle = angle − 60
    angle = angle + 20
    To what angle (in degrees) does the servo turn in the end?
  11. 11.🦾 A servo program runs:
    angle = 40
    angle = angle − 30
    angle = angle + 40
    To what angle (in degrees) does the servo turn in the end?
  12. 12.⚙️ A motor changes electrical energy into … (a) sound only (b) movement (c) water (d) light
  13. 13.True or false: “reverses if wires swap” is true of a servo motor. (a) False (b) True
  14. 14.True or false: “has just two wires” is true of a DC motor. (a) False (b) True
  15. 15.🦾 A servo turns 60° every 100 ms. How many milliseconds does it take to turn 150°?
  16. 16.🦾 A servo program runs:
    angle = 150
    angle = angle + 10
    angle = angle − 20
    To what angle (in degrees) does the servo turn in the end?
  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 right (b) points up and left (c) points straight up (d) points up and right
  18. 18.🦾 A servo turns 60° every 100 ms. How many milliseconds does it take to turn 60°?
  19. 19.🦾 A servo moves from 110° to 180°. How many degrees does it turn?
  20. 20.True or false: “turns to an exact angle” is true of a servo motor. (a) True (b) False
  21. 21.🦾 A servo program runs:
    angle = 50
    angle = angle − 50
    angle = angle + 10
    angle = angle + 60
    angle = angle − 20
    To what angle (in degrees) does the servo turn in the end?
  22. 22.True or false: “holds a set angle” is true of a DC motor. (a) True (b) False
  23. 23.⚙️ DC motor or servo motor: which one drives the wheels? (a) a servo motor (b) a DC motor
  24. 24.True or false: “usually turns 0° to 180°” is true of a DC motor. (a) True (b) False
  25. 25.🦾 A servo turns 60° every 100 ms. How many milliseconds does it take to turn 180°?
  26. 26.⚙️ DC motor or servo motor: which one turns to an exact angle? (a) a servo motor (b) a DC motor
  27. 27.⚙️ 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
  28. 28.True or false: “spins faster with more V” is true of a servo motor. (a) True (b) False
  29. 29.🦾 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 straight up (c) points up and right (d) points up and left
  30. 30.⚙️ DC motor or servo motor: which one spins round and round? (a) a servo motor (b) a DC motor
  31. 31.🦾 A servo moves from 50° to 40°. How many degrees does it turn?
  32. 32.🦾 A servo turns 60° every 100 ms. How many milliseconds does it take to turn 30°?
  33. 33.🦾 A servo program runs:
    angle = 160
    angle = angle − 60
    angle = angle + 10
    angle = angle − 20
    angle = angle + 40
    To what angle (in degrees) does the servo turn in the end?
  34. 34.True or false: “usually turns 0° to 180°” is true of a servo motor. (a) False (b) True
  35. 35.True or false: “has just two wires” is true of a servo motor. (a) True (b) False
  36. 36.True or false: “has a signal wire” is true of a servo motor. (a) False (b) True
  37. 37.🦾 A servo program runs:
    angle = 160
    angle = angle + 20
    angle = angle − 30
    To what angle (in degrees) does the servo turn in the end?
  38. 38.⚙️ A common servo can turn from 0° up to about … (a) 1800° (b) 180° (c) 18° (d) 10°
  39. 39.🦾 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 up and left (c) points left (d) points right
  40. 40.🦾 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 straight up (b) points up and right (c) points right (d) points left

Answer key

  1. 130
  2. True
  3. a servo motor
  4. a DC motor
  5. 20
  6. 150
  7. 120
  8. a servo motor
  9. 40
  10. 90
  11. 50
  12. movement
  13. False
  14. True
  15. 250
  16. 140
  17. points straight up
  18. 100
  19. 70
  20. True
  21. 50
  22. False
  23. a DC motor
  24. False
  25. 300
  26. a servo motor
  27. a DC motor
  28. False
  29. points up and right
  30. a DC motor
  31. 10
  32. 50
  33. 130
  34. True
  35. False
  36. True
  37. 150
  38. 180°
  39. points left
  40. points right

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