← DC motors and servo motors lesson New set →

Robotics Worksheet: DC and Servo Motors

Robotics lesson 12: DC motors and servo motors · Set 283 · 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 turns 60° every 100 ms. How many milliseconds does it take to turn 150°?
  2. 2.True or false: “holds a set angle” is true of a servo motor. (a) False (b) True
  3. 3.True or false: “spins round and round” is true of a servo motor. (a) False (b) True
  4. 4.🦾 A servo moves from 60° to 40°. How many degrees does it turn?
  5. 5.🦾 A servo program runs:
    angle = 10
    angle = angle − 10
    angle = angle + 20
    To what angle (in degrees) does the servo turn in the end?
  6. 6.True or false: “turns to an exact angle” is true of a servo motor. (a) True (b) False
  7. 7.True or false: “usually turns 0° to 180°” is true of a servo motor. (a) False (b) True
  8. 8.🦾 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 left (b) points straight up (c) points right (d) points up and right
  9. 9.⚙️ A motor changes electrical energy into … (a) water (b) movement (c) sound only (d) light
  10. 10.⚙️ Which motor is best for spinning a robot’s wheels round and round? (a) a buzzer (b) a servo motor (c) a light sensor (d) a DC motor
  11. 11.🦾 A servo moves from 40° to 170°. How many degrees does it turn?
  12. 12.🦾 A servo moves from 40° to 10°. How many degrees does it turn?
  13. 13.🦾 A servo turns 60° every 100 ms. How many milliseconds does it take to turn 180°?
  14. 14.⚙️ DC motor or servo motor: which one spins round and round? (a) a servo motor (b) a DC motor
  15. 15.True or false: “drives the wheels” is true of a DC motor. (a) True (b) False
  16. 16.⚙️ DC motor or servo motor: which one spins faster with more V? (a) a servo motor (b) a DC motor
  17. 17.⚙️ Which motor is best for turning a robot arm to exactly 45°? (a) a servo motor (b) a DC motor (c) a buzzer (d) a fan
  18. 18.🦾 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 up and right (d) points up and left
  19. 19.🦾 A servo moves from 90° to 50°. How many degrees does it turn?
  20. 20.🦾 A servo program runs:
    angle = 110
    angle = angle + 10
    angle = angle + 60
    To what angle (in degrees) does the servo turn in the end?
  21. 21.⚙️ DC motor or servo motor: which one turns to an exact angle? (a) a DC motor (b) a servo motor
  22. 22.⚙️ DC motor or servo motor: which one reverses if wires swap? (a) a servo motor (b) a DC motor
  23. 23.⚙️ A common servo can turn from 0° up to about … (a) 18° (b) 1800° (c) 10° (d) 180°
  24. 24.True or false: “holds a set angle” 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 120°?
  26. 26.⚙️ DC motor or servo motor: which one holds a set angle? (a) a DC motor (b) a servo motor
  27. 27.True or false: “has a signal wire” is true of a servo motor. (a) False (b) True
  28. 28.True or false: “reverses if wires swap” is true of a servo motor. (a) True (b) False
  29. 29.⚙️ How do you make a DC motor spin the other way? (a) swap its two wires (b) paint it red (c) shake it (d) add more wheels
  30. 30.🦾 A servo turns 60° every 100 ms. How many milliseconds does it take to turn 90°?
  31. 31.True or false: “spins faster with more V” is true of a servo motor. (a) False (b) True
  32. 32.🦾 A servo program runs:
    angle = 160
    angle = angle − 60
    angle = angle − 30
    angle = angle − 30
    angle = angle − 10
    To what angle (in degrees) does the servo turn in the end?
  33. 33.True or false: “has a signal wire” is true of a DC motor. (a) True (b) False
  34. 34.True or false: “turns to an exact angle” is true of a DC motor. (a) True (b) False
  35. 35.🦾 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 up and left (c) points left (d) points straight up
  36. 36.🦾 A servo program runs:
    angle = 10
    angle = angle + 50
    angle = angle + 40
    To what angle (in degrees) does the servo turn in the end?
  37. 37.⚙️ DC motor or servo motor: which one usually turns 0° to 180°? (a) a DC motor (b) a servo motor
  38. 38.🦾 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 up and right (b) points right (c) points straight up (d) points up and left
  39. 39.True or false: “drives the wheels” is true of a servo motor. (a) False (b) True
  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 up and left (b) points up and right (c) points straight up (d) points right

Answer key

  1. 250
  2. True
  3. False
  4. 20
  5. 20
  6. True
  7. True
  8. points up and right
  9. movement
  10. a DC motor
  11. 130
  12. 30
  13. 300
  14. a DC motor
  15. True
  16. a DC motor
  17. a servo motor
  18. points up and left
  19. 40
  20. 180
  21. a servo motor
  22. a DC motor
  23. 180°
  24. False
  25. 200
  26. a servo motor
  27. True
  28. False
  29. swap its two wires
  30. 150
  31. False
  32. 30
  33. False
  34. False
  35. points left
  36. 100
  37. a servo motor
  38. points straight up
  39. False
  40. points right

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