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Robotics Worksheet: Robot Batteries

Robotics lesson 4: Power for robots · Set 813 · 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 holds 1000 mAh and the robot uses 200 mA. For how many hours can it run?
  2. 2.🔋 A robot’s battery holds 100 mAh and the robot uses 100 mA. For how many hours can it run?
  3. 3.🔋 A robot’s battery is at 80% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  4. 4.🔋 A robot’s battery holds 1200 mAh and the robot uses 400 mA. For how many hours can it run?
  5. 5.🔋 A robot’s battery is at 0% and charging adds 20% every 10 minutes. How many minutes until it is full (100%)?
  6. 6.🔋 Battery capacity (how much it holds) is often written in … (a) km (b) °C (c) kg (d) mAh
  7. 7.🔋 A robot runs on 3 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  8. 8.🔋 A robot uses 4% of its battery every 4 minutes. How many minutes does a full battery (100%) last?
  9. 9.🔋 A robot’s battery holds 5000 mAh and the robot uses 1000 mA. For how many hours can it run?
  10. 10.🔋 A robot’s battery holds 1400 mAh and the robot uses 200 mA. For how many hours can it run?
  11. 11.🔋 What does a robot vacuum do when its battery is low? (a) goes back to its dock (b) keeps going for ever (c) explodes (d) turns into a car
  12. 12.🔋 A robot’s battery is at 0% and charging adds 25% every 10 minutes. How many minutes until it is full (100%)?
  13. 13.🔋 A robot’s battery is at 40% and charging adds 10% every 10 minutes. How many minutes until it is full (100%)?
  14. 14.🔋 A robot’s battery holds 300 mAh and the robot uses 100 mA. For how many hours can it run?
  15. 15.🔋 What powers most moving robots? (a) a tiny magnet (b) a water tank (c) a rechargeable battery (d) a candle
  16. 16.🔋 A robot’s battery holds 1000 mAh and the robot uses 500 mA. For how many hours can it run?
  17. 17.🔋 A robot’s battery holds 8000 mAh and the robot uses 1000 mA. For how many hours can it run?
  18. 18.🔋 A robot uses 2% of its battery every 6 minutes. How many minutes does a full battery (100%) last?
  19. 19.🔋 A robot’s battery holds 800 mAh and the robot uses 200 mA. For how many hours can it run?
  20. 20.🔋 A robot uses 10% of its battery every 5 minutes. How many minutes does a full battery (100%) last?
  21. 21.🔋 A robot uses 25% of its battery every 3 minutes. How many minutes does a full battery (100%) last?
  22. 22.🔋 A robot uses 20% of its battery every 6 minutes. How many minutes does a full battery (100%) last?
  23. 23.🔋 A robot’s battery is at 80%. Each lap of the track uses 20%. How many laps can it do before the battery reaches 0%?
  24. 24.🔋 A robot uses 2% of its battery every 2 minutes. How many minutes does a full battery (100%) last?
  25. 25.🔋 A robot’s battery is at 90%. Each lap of the track uses 5%. How many laps can it do before the battery reaches 0%?
  26. 26.🔋 A robot uses 5% of its battery every 5 minutes. How many minutes does a full battery (100%) last?
  27. 27.🔋 A robot uses 4% of its battery every 6 minutes. How many minutes does a full battery (100%) last?
  28. 28.🔋 A robot runs on 7 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  29. 29.🔋 A robot’s battery holds 3000 mAh and the robot uses 500 mA. For how many hours can it run?
  30. 30.🔋 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%?
  31. 31.🔋 A robot’s battery is at 50%. Each lap of the track uses 10%. How many laps can it do before the battery reaches 0%?
  32. 32.🔋 A robot runs on 8 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  33. 33.🔋 A robot uses 5% of its battery every 2 minutes. How many minutes does a full battery (100%) last?
  34. 34.🔋 A robot’s battery holds 800 mAh and the robot uses 400 mA. For how many hours can it run?
  35. 35.🔋 A robot’s battery is at 25%. Each lap of the track uses 5%. How many laps can it do before the battery reaches 0%?
  36. 36.🔋 A robot runs on 6 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  37. 37.🔋 A robot’s battery holds 2400 mAh and the robot uses 400 mA. For how many hours can it run?
  38. 38.🔋 A robot’s battery is at 20% and charging adds 20% every 10 minutes. How many minutes until it is full (100%)?
  39. 39.🔋 A robot uses 25% of its battery every 1 minute. How many minutes does a full battery (100%) last?
  40. 40.🔋 A robot arm bolted to a factory floor usually gets its power from … (a) a coin cell (b) a wind-up key (c) a power cable (d) a solar panel

Answer key

  1. 5
  2. 1
  3. 40
  4. 3
  5. 50
  6. mAh
  7. 4.5
  8. 100
  9. 5
  10. 7
  11. goes back to its dock
  12. 40
  13. 60
  14. 3
  15. a rechargeable battery
  16. 2
  17. 8
  18. 300
  19. 4
  20. 50
  21. 12
  22. 30
  23. 4
  24. 100
  25. 18
  26. 100
  27. 150
  28. 10.5
  29. 6
  30. 2
  31. 5
  32. 12
  33. 40
  34. 2
  35. 5
  36. 9
  37. 6
  38. 40
  39. 4
  40. a power cable

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