← DC motors and servo motors lesson New set →

Robotics Worksheet: DC and Servo Motors

Robotics lesson 12: DC motors and servo motors · Set 809 · 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 = 10
    angle = angle + 10
    angle = angle + 30
    To what angle (in degrees) does the servo turn in the end?
  2. 2.🦾 A servo program runs:
    angle = 140
    angle = angle − 50
    angle = angle + 30
    angle = angle − 50
    To what angle (in degrees) does the servo turn in the end?
  3. 3.⚙️ DC motor or servo motor: which one drives the wheels? (a) a servo motor (b) a DC motor
  4. 4.True or false: “spins round and round” is true of a servo motor. (a) True (b) False
  5. 5.⚙️ Which motor is best for spinning a robot’s wheels round and round? (a) a DC motor (b) a light sensor (c) a servo motor (d) a buzzer
  6. 6.True or false: “turns to an exact angle” is true of a DC motor. (a) False (b) True
  7. 7.⚙️ DC motor or servo motor: which one has a signal wire? (a) a servo motor (b) a DC motor
  8. 8.🦾 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 left (b) points straight up (c) points up and right (d) points up and left
  9. 9.🦾 A servo turns 60° every 100 ms. How many milliseconds does it take to turn 150°?
  10. 10.🦾 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 up and right (c) points up and left (d) points right
  11. 11.True or false: “has a signal wire” is true of a DC motor. (a) False (b) True
  12. 12.True or false: “spins faster with more V” is true of a servo motor. (a) False (b) True
  13. 13.⚙️ DC motor or servo motor: which one moves an arm joint? (a) a DC motor (b) a servo motor
  14. 14.⚙️ DC motor or servo motor: which one spins faster with more V? (a) a servo motor (b) a DC motor
  15. 15.⚙️ DC motor or servo motor: which one spins round and round? (a) a DC motor (b) a servo motor
  16. 16.🦾 A servo moves from 0° to 170°. How many degrees does it turn?
  17. 17.⚙️ DC motor or servo motor: which one holds a set angle? (a) a DC motor (b) a servo motor
  18. 18.True or false: “moves an arm joint” is true of a servo motor. (a) False (b) True
  19. 19.🦾 A servo moves from 20° to 80°. How many degrees does it turn?
  20. 20.⚙️ A motor changes electrical energy into … (a) movement (b) water (c) sound only (d) light
  21. 21.⚙️ A common servo can turn from 0° up to about … (a) 1800° (b) 18° (c) 180° (d) 10°
  22. 22.🦾 A servo program runs:
    angle = 170
    angle = angle − 50
    angle = angle + 30
    angle = angle − 40
    To what angle (in degrees) does the servo turn in the end?
  23. 23.🦾 A servo program runs:
    angle = 70
    angle = angle − 50
    angle = angle + 30
    angle = angle + 10
    angle = angle + 40
    To what angle (in degrees) does the servo turn in the end?
  24. 24.🦾 A servo moves from 120° to 100°. How many degrees does it turn?
  25. 25.🦾 A servo turns 60° every 100 ms. How many milliseconds does it take to turn 180°?
  26. 26.True or false: “has a signal wire” is true of a servo motor. (a) False (b) True
  27. 27.🦾 A servo program runs:
    angle = 40
    angle = angle + 30
    angle = angle + 20
    angle = angle + 30
    angle = angle + 30
    To what angle (in degrees) does the servo turn in the end?
  28. 28.True or false: “holds a set angle” is true of a servo motor. (a) False (b) True
  29. 29.🦾 A servo program runs:
    angle = 40
    angle = angle + 20
    angle = angle − 30
    angle = angle − 30
    angle = angle + 40
    To what angle (in degrees) does the servo turn in the end?
  30. 30.True or false: “turns to an exact angle” is true of a servo motor. (a) True (b) False
  31. 31.🦾 A servo program runs:
    angle = 70
    angle = angle − 60
    angle = angle + 60
    angle = angle − 40
    angle = angle + 10
    To what angle (in degrees) does the servo turn in the end?
  32. 32.True or false: “usually turns 0° to 180°” is true of a servo motor. (a) False (b) True
  33. 33.🦾 A servo program runs:
    angle = 40
    angle = angle + 50
    angle = angle + 50
    angle = angle + 30
    To what angle (in degrees) does the servo turn in the end?
  34. 34.⚙️ 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
  35. 35.True or false: “spins faster with more V” is true of a DC motor. (a) True (b) False
  36. 36.🦾 A servo turns 60° every 100 ms. How many milliseconds does it take to turn 120°?
  37. 37.⚙️ DC motor or servo motor: which one turns to an exact angle? (a) a DC motor (b) a servo motor
  38. 38.🦾 A servo turns 60° every 100 ms. How many milliseconds does it take to turn 60°?
  39. 39.🦾 A servo program runs:
    angle = 70
    angle = angle + 10
    angle = angle + 60
    To what angle (in degrees) does the servo turn in the end?
  40. 40.🦾 A servo turns 60° every 100 ms. How many milliseconds does it take to turn 30°?

Answer key

  1. 50
  2. 70
  3. a DC motor
  4. False
  5. a DC motor
  6. False
  7. a servo motor
  8. points left
  9. 250
  10. points up and left
  11. False
  12. False
  13. a servo motor
  14. a DC motor
  15. a DC motor
  16. 170
  17. a servo motor
  18. True
  19. 60
  20. movement
  21. 180°
  22. 110
  23. 100
  24. 20
  25. 300
  26. True
  27. 150
  28. True
  29. 40
  30. True
  31. 40
  32. True
  33. 170
  34. a servo motor
  35. True
  36. 200
  37. a servo motor
  38. 100
  39. 140
  40. 50

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