← DC motors and servo motors lesson New set →

Robotics Worksheet: DC and Servo Motors

Robotics lesson 12: DC motors and servo motors · Set 93 · 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 60°?
  2. 2.True or false: “spins faster with more V” is true of a servo motor. (a) True (b) False
  3. 3.🦾 A servo turns 60° every 100 ms. How many milliseconds does it take to turn 30°?
  4. 4.⚙️ DC motor or servo motor: which one spins round and round? (a) a servo motor (b) a DC motor
  5. 5.⚙️ DC motor or servo motor: which one spins faster with more V? (a) a servo motor (b) a DC motor
  6. 6.⚙️ DC motor or servo motor: which one drives the wheels? (a) a DC motor (b) a servo motor
  7. 7.⚙️ DC motor or servo motor: which one holds a set angle? (a) a servo motor (b) a DC motor
  8. 8.⚙️ A motor changes electrical energy into … (a) light (b) movement (c) sound only (d) water
  9. 9.🦾 A servo program runs:
    angle = 70
    angle = angle + 40
    angle = angle + 60
    angle = angle − 60
    angle = angle − 40
    To what angle (in degrees) does the servo turn in the end?
  10. 10.⚙️ Which motor is best for turning a robot arm to exactly 45°? (a) a servo motor (b) a buzzer (c) a fan (d) a DC motor
  11. 11.True or false: “has a signal wire” is true of a DC motor. (a) False (b) True
  12. 12.⚙️ Which motor is best for spinning a robot’s wheels round and round? (a) a DC motor (b) a buzzer (c) a servo motor (d) a light sensor
  13. 13.True or false: “usually turns 0° to 180°” is true of a DC motor. (a) False (b) True
  14. 14.🦾 A servo program runs:
    angle = 110
    angle = angle + 20
    angle = angle − 30
    angle = angle + 30
    angle = angle − 30
    To what angle (in degrees) does the servo turn in the end?
  15. 15.🦾 A servo program runs:
    angle = 170
    angle = angle − 40
    angle = angle + 20
    To what angle (in degrees) does the servo turn in the end?
  16. 16.⚙️ How do you make a DC motor spin the other way? (a) add more wheels (b) paint it red (c) swap its two wires (d) shake it
  17. 17.🦾 A servo program runs:
    angle = 110
    angle = angle − 40
    angle = angle − 60
    To what angle (in degrees) does the servo turn in the end?
  18. 18.🦾 A servo moves from 110° to 170°. How many degrees does it turn?
  19. 19.🦾 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 right (b) points right (c) points straight up (d) points left
  20. 20.True or false: “moves an arm joint” is true of a DC motor. (a) True (b) False
  21. 21.True or false: “has a signal wire” is true of a servo motor. (a) False (b) True
  22. 22.⚙️ DC motor or servo motor: which one reverses if wires swap? (a) a servo motor (b) a DC motor
  23. 23.🦾 A servo moves from 150° to 70°. How many degrees does it turn?
  24. 24.🦾 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 left (b) points right (c) points up and right (d) points straight up
  25. 25.⚙️ A common servo can turn from 0° up to about … (a) 10° (b) 1800° (c) 180° (d) 18°
  26. 26.⚙️ DC motor or servo motor: which one has just two wires? (a) a DC motor (b) a servo motor
  27. 27.True or false: “turns to an exact angle” is true of a DC motor. (a) False (b) True
  28. 28.🦾 A servo program runs:
    angle = 40
    angle = angle + 30
    angle = angle + 20
    angle = angle − 50
    To what angle (in degrees) does the servo turn in the end?
  29. 29.True or false: “spins round and round” is true of a DC motor. (a) False (b) True
  30. 30.🦾 A servo moves from 0° to 20°. How many degrees does it turn?
  31. 31.True or false: “spins faster with more V” is true of a DC motor. (a) False (b) True
  32. 32.🦾 A servo moves from 180° to 50°. How many degrees does it turn?
  33. 33.True or false: “spins round and round” is true of a servo motor. (a) True (b) False
  34. 34.True or false: “moves an arm joint” is true of a servo motor. (a) False (b) True
  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 left (b) points up and left (c) points straight up (d) points right
  36. 36.True or false: “reverses if wires swap” is true of a servo motor. (a) True (b) False
  37. 37.🦾 A servo program runs:
    angle = 40
    angle = angle + 50
    angle = angle + 30
    angle = angle + 20
    angle = angle + 10
    To what angle (in degrees) does the servo turn in the end?
  38. 38.🦾 A servo program runs:
    angle = 50
    angle = angle + 40
    angle = angle + 30
    angle = angle − 50
    angle = angle − 40
    To what angle (in degrees) does the servo turn in the end?
  39. 39.True or false: “drives the wheels” is true of a DC motor. (a) False (b) True
  40. 40.True or false: “holds a set angle” is true of a servo motor. (a) True (b) False

Answer key

  1. 100
  2. False
  3. 50
  4. a DC motor
  5. a DC motor
  6. a DC motor
  7. a servo motor
  8. movement
  9. 70
  10. a servo motor
  11. False
  12. a DC motor
  13. False
  14. 100
  15. 150
  16. swap its two wires
  17. 10
  18. 60
  19. points up and right
  20. False
  21. True
  22. a DC motor
  23. 80
  24. points straight up
  25. 180°
  26. a DC motor
  27. False
  28. 40
  29. True
  30. 20
  31. True
  32. 130
  33. False
  34. True
  35. points left
  36. False
  37. 150
  38. 30
  39. True
  40. True

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