← DC motors and servo motors lesson New set →

Robotics Worksheet: DC and Servo Motors

Robotics lesson 12: DC motors and servo motors · Set 862 · 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 10° to 180°. How many degrees does it turn?
  2. 2.True or false: “has a signal wire” is true of a DC motor. (a) True (b) False
  3. 3.⚙️ A motor changes electrical energy into … (a) water (b) light (c) sound only (d) movement
  4. 4.🦾 A servo turns 60° every 100 ms. How many milliseconds does it take to turn 120°?
  5. 5.⚙️ How do you make a DC motor spin the other way? (a) paint it red (b) swap its two wires (c) shake it (d) add more wheels
  6. 6.🦾 A servo program runs:
    angle = 170
    angle = angle − 40
    angle = angle + 20
    angle = angle + 30
    angle = angle − 40
    To what angle (in degrees) does the servo turn in the end?
  7. 7.🦾 A servo moves from 90° to 0°. How many degrees does it turn?
  8. 8.🦾 A servo moves from 140° to 80°. How many degrees does it turn?
  9. 9.🦾 A servo turns 60° every 100 ms. How many milliseconds does it take to turn 60°?
  10. 10.⚙️ DC motor or servo motor: which one spins round and round? (a) a DC motor (b) a servo motor
  11. 11.🦾 A servo turns 60° every 100 ms. How many milliseconds does it take to turn 90°?
  12. 12.True or false: “reverses if wires swap” is true of a DC motor. (a) False (b) True
  13. 13.🦾 A servo turns 60° every 100 ms. How many milliseconds does it take to turn 30°?
  14. 14.🦾 A servo program runs:
    angle = 70
    angle = angle − 30
    angle = angle + 60
    To what angle (in degrees) does the servo turn in the end?
  15. 15.⚙️ DC motor or servo motor: which one drives the wheels? (a) a DC motor (b) a servo motor
  16. 16.True or false: “has a signal wire” is true of a servo motor. (a) True (b) False
  17. 17.⚙️ Which motor is best for spinning a robot’s wheels round and round? (a) a servo motor (b) a light sensor (c) a buzzer (d) a DC motor
  18. 18.True or false: “reverses if wires swap” is true of a servo motor. (a) False (b) True
  19. 19.True or false: “usually turns 0° to 180°” is true of a DC motor. (a) False (b) True
  20. 20.True or false: “spins round and round” is true of a servo motor. (a) False (b) True
  21. 21.🦾 A servo program runs:
    angle = 130
    angle = angle + 40
    angle = angle − 20
    angle = angle − 20
    angle = angle + 20
    To what angle (in degrees) does the servo turn in the end?
  22. 22.⚙️ DC motor or servo motor: which one turns to an exact angle? (a) a servo motor (b) a DC motor
  23. 23.True or false: “holds a set angle” is true of a DC motor. (a) True (b) False
  24. 24.🦾 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 up and right (b) points left (c) points straight up (d) points up and left
  25. 25.⚙️ A common servo can turn from 0° up to about … (a) 1800° (b) 180° (c) 18° (d) 10°
  26. 26.⚙️ DC motor or servo motor: which one moves an arm joint? (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) True (b) False
  28. 28.🦾 A servo program runs:
    angle = 130
    angle = angle − 50
    angle = angle + 30
    angle = angle − 10
    To what angle (in degrees) does the servo turn in the end?
  29. 29.🦾 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 up and right (c) points up and left (d) points straight up
  30. 30.⚙️ Which motor is best for turning a robot arm to exactly 45°? (a) a fan (b) a buzzer (c) a servo motor (d) a DC motor
  31. 31.⚙️ DC motor or servo motor: which one holds a set angle? (a) a servo motor (b) a DC motor
  32. 32.True or false: “moves an arm joint” is true of a servo motor. (a) False (b) True
  33. 33.True or false: “drives the wheels” is true of a DC motor. (a) False (b) True
  34. 34.🦾 A servo moves from 20° to 80°. How many degrees does it turn?
  35. 35.True or false: “moves an arm joint” is true of a DC motor. (a) True (b) False
  36. 36.🦾 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 straight up (c) points right (d) points left
  37. 37.🦾 A servo program runs:
    angle = 0
    angle = angle + 20
    angle = angle + 20
    angle = angle + 60
    To what angle (in degrees) does the servo turn in the end?
  38. 38.True or false: “has just two wires” is true of a servo motor. (a) False (b) True
  39. 39.🦾 A servo program runs:
    angle = 40
    angle = angle − 20
    angle = angle + 60
    angle = angle − 10
    To what angle (in degrees) does the servo turn in the end?
  40. 40.🦾 A servo program runs:
    angle = 180
    angle = angle − 40
    angle = angle + 10
    To what angle (in degrees) does the servo turn in the end?

Answer key

  1. 170
  2. False
  3. movement
  4. 200
  5. swap its two wires
  6. 140
  7. 90
  8. 60
  9. 100
  10. a DC motor
  11. 150
  12. True
  13. 50
  14. 100
  15. a DC motor
  16. True
  17. a DC motor
  18. False
  19. False
  20. False
  21. 150
  22. a servo motor
  23. False
  24. points left
  25. 180°
  26. a servo motor
  27. False
  28. 100
  29. points up and left
  30. a servo motor
  31. a servo motor
  32. True
  33. True
  34. 60
  35. False
  36. points up and right
  37. 100
  38. False
  39. 70
  40. 150

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