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Robotics Worksheet: Robot Batteries

Robotics lesson 4: Power for robots · Set 574 · 40 questions
TalentJR

Robot tip (Holds ÷ uses): Hours = capacity in mAh ÷ current in mA (2000 mAh ÷ 500 mA = 4 hours). Percent: blocks = 100% ÷ % used per block; time = blocks × minutes per block. Cells in series add up: 4 cells of 1.5 V give 6 V.

NameDateTime takenScore ___ / 40
  1. 1.🔋 A robot’s battery is at 80% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  2. 2.🔋 A robot’s battery is at 20% and charging adds 20% every 10 minutes. How many minutes until it is full (100%)?
  3. 3.🔋 A robot’s battery holds 2800 mAh and the robot uses 400 mA. For how many hours can it run?
  4. 4.🔋 A robot’s battery is at 20% and charging adds 10% every 10 minutes. How many minutes until it is full (100%)?
  5. 5.🔋 A robot’s battery is at 80%. Each lap of the track uses 5%. How many laps can it do before the battery reaches 0%?
  6. 6.🔋 A robot’s battery is at 90%. Each lap of the track uses 10%. How many laps can it do before the battery reaches 0%?
  7. 7.🔋 A robot arm bolted to a factory floor usually gets its power from … (a) a solar panel (b) a power cable (c) a wind-up key (d) a coin cell
  8. 8.🔋 A robot runs on 8 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  9. 9.🔋 A robot uses 4% of its battery every 6 minutes. How many minutes does a full battery (100%) last?
  10. 10.🔋 A robot runs on 2 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  11. 11.🔋 A robot uses 25% of its battery every 3 minutes. How many minutes does a full battery (100%) last?
  12. 12.🔋 A robot’s battery holds 1500 mAh and the robot uses 250 mA. For how many hours can it run?
  13. 13.🔋 A robot’s battery is at 90% and charging adds 10% every 10 minutes. How many minutes until it is full (100%)?
  14. 14.🔋 What should you do with a swollen or damaged robot battery? (a) charge it again (b) squeeze it flat (c) give it to an adult (d) throw it in a fire
  15. 15.🔋 A robot’s battery is at 40%. Each lap of the track uses 5%. How many laps can it do before the battery reaches 0%?
  16. 16.🔋 A robot’s battery is at 55%. Each lap of the track uses 5%. How many laps can it do before the battery reaches 0%?
  17. 17.🔋 A robot’s battery is at 50%. Each lap of the track uses 25%. How many laps can it do before the battery reaches 0%?
  18. 18.🔋 A robot’s battery holds 300 mAh and the robot uses 100 mA. For how many hours can it run?
  19. 19.🔋 What powers most moving robots? (a) a candle (b) a tiny magnet (c) a water tank (d) a rechargeable battery
  20. 20.🔋 Battery capacity (how much it holds) is often written in … (a) kg (b) mAh (c) °C (d) km
  21. 21.🔋 A robot’s battery is at 10% and charging adds 10% every 10 minutes. How many minutes until it is full (100%)?
  22. 22.🔋 A robot uses 20% of its battery every 4 minutes. How many minutes does a full battery (100%) last?
  23. 23.🔋 A robot’s battery is at 100%. Each lap of the track uses 20%. How many laps can it do before the battery reaches 0%?
  24. 24.🔋 A robot’s battery holds 7000 mAh and the robot uses 1000 mA. For how many hours can it run?
  25. 25.🔋 A robot’s battery holds 2400 mAh and the robot uses 400 mA. For how many hours can it run?
  26. 26.🔋 A robot’s battery is at 45% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  27. 27.🔋 A robot’s battery holds 100 mAh and the robot uses 100 mA. For how many hours can it run?
  28. 28.🔋 A robot’s battery is at 75%. Each lap of the track uses 25%. How many laps can it do before the battery reaches 0%?
  29. 29.🔋 A robot’s battery is at 100%. Each lap of the track uses 25%. How many laps can it do before the battery reaches 0%?
  30. 30.🔋 A robot’s battery is at 45%. Each lap of the track uses 5%. How many laps can it do before the battery reaches 0%?
  31. 31.🔋 A robot uses 20% of its battery every 3 minutes. How many minutes does a full battery (100%) last?
  32. 32.🔋 A robot uses 10% of its battery every 5 minutes. How many minutes does a full battery (100%) last?
  33. 33.🔋 A robot uses 2% of its battery every 4 minutes. How many minutes does a full battery (100%) last?
  34. 34.🔋 A robot uses 20% of its battery every 2 minutes. How many minutes does a full battery (100%) last?
  35. 35.🔋 A robot uses 10% of its battery every 2 minutes. How many minutes does a full battery (100%) last?
  36. 36.🔋 What does a robot vacuum do when its battery is low? (a) goes back to its dock (b) explodes (c) turns into a car (d) keeps going for ever
  37. 37.🔋 A robot’s battery holds 3000 mAh and the robot uses 500 mA. For how many hours can it run?
  38. 38.🔋 A robot’s battery holds 800 mAh and the robot uses 200 mA. For how many hours can it run?
  39. 39.🔋 A robot uses 5% of its battery every 4 minutes. How many minutes does a full battery (100%) last?
  40. 40.🔋 A robot runs on 4 cells of 1.5 V joined in series. What is the total voltage (in volts)? =

Answer key

  1. 40
  2. 40
  3. 7
  4. 80
  5. 16
  6. 9
  7. a power cable
  8. 12
  9. 150
  10. 3
  11. 12
  12. 6
  13. 10
  14. give it to an adult
  15. 8
  16. 11
  17. 2
  18. 3
  19. a rechargeable battery
  20. mAh
  21. 90
  22. 20
  23. 5
  24. 7
  25. 6
  26. 110
  27. 1
  28. 3
  29. 4
  30. 9
  31. 15
  32. 50
  33. 200
  34. 10
  35. 20
  36. goes back to its dock
  37. 6
  38. 4
  39. 80
  40. 6

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