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Robotics Worksheet: Robot Batteries

Robotics lesson 4: Power for robots · Set 131 · 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 400 mAh and the robot uses 400 mA. For how many hours can it run?
  2. 2.🔋 A robot’s battery is at 60% and charging adds 20% every 10 minutes. How many minutes until it is full (100%)?
  3. 3.🔋 A robot’s battery holds 1200 mAh and the robot uses 200 mA. For how many hours can it run?
  4. 4.🔋 A robot’s battery holds 500 mAh and the robot uses 250 mA. For how many hours can it run?
  5. 5.🔋 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%?
  6. 6.🔋 What powers most moving robots? (a) a water tank (b) a tiny magnet (c) a rechargeable battery (d) a candle
  7. 7.🔋 A robot uses 10% of its battery every 4 minutes. How many minutes does a full battery (100%) last?
  8. 8.🔋 A robot’s battery is at 30% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  9. 9.🔋 A robot arm bolted to a factory floor usually gets its power from … (a) a coin cell (b) a solar panel (c) a power cable (d) a wind-up key
  10. 10.🔋 A robot uses 10% of its battery every 5 minutes. How many minutes does a full battery (100%) last?
  11. 11.🔋 A robot uses 5% of its battery every 5 minutes. How many minutes does a full battery (100%) last?
  12. 12.🔋 A robot uses 10% of its battery every 2 minutes. How many minutes does a full battery (100%) last?
  13. 13.🔋 A robot runs on 3 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  14. 14.🔋 A robot’s battery holds 1500 mAh and the robot uses 500 mA. For how many hours can it run?
  15. 15.🔋 A robot’s battery holds 2000 mAh and the robot uses 1000 mA. For how many hours can it run?
  16. 16.🔋 What does a robot vacuum do when its battery is low? (a) keeps going for ever (b) explodes (c) turns into a car (d) goes back to its dock
  17. 17.🔋 A robot’s battery holds 600 mAh and the robot uses 200 mA. For how many hours can it run?
  18. 18.🔋 A robot uses 25% of its battery every 3 minutes. How many minutes does a full battery (100%) last?
  19. 19.🔋 A robot’s battery is at 40%. Each lap of the track uses 20%. How many laps can it do before the battery reaches 0%?
  20. 20.🔋 A robot’s battery is at 15%. Each lap of the track uses 5%. How many laps can it do before the battery reaches 0%?
  21. 21.🔋 A robot runs on 4 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  22. 22.🔋 A robot’s battery is at 60% and charging adds 10% every 10 minutes. How many minutes until it is full (100%)?
  23. 23.🔋 A robot uses 2% of its battery every 1 minute. How many minutes does a full battery (100%) last?
  24. 24.🔋 A robot runs on 7 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  25. 25.🔋 A robot runs on 8 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  26. 26.🔋 Battery capacity (how much it holds) is often written in … (a) km (b) °C (c) kg (d) mAh
  27. 27.🔋 A robot uses 4% of its battery every 2 minutes. How many minutes does a full battery (100%) last?
  28. 28.🔋 A robot’s battery holds 7000 mAh and the robot uses 1000 mA. For how many hours can it run?
  29. 29.🔋 A robot uses 5% of its battery every 2 minutes. How many minutes does a full battery (100%) last?
  30. 30.🔋 A robot uses 4% of its battery every 4 minutes. How many minutes does a full battery (100%) last?
  31. 31.🔋 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%?
  32. 32.🔋 A robot’s battery is at 80%. Each lap of the track uses 10%. How many laps can it do before the battery reaches 0%?
  33. 33.🔋 A robot’s battery holds 4000 mAh and the robot uses 500 mA. For how many hours can it run?
  34. 34.🔋 A robot runs on 2 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  35. 35.🔋 A robot’s battery is at 70%. Each lap of the track uses 5%. How many laps can it do before the battery reaches 0%?
  36. 36.🔋 A robot uses 20% of its battery every 1 minute. How many minutes does a full battery (100%) last?
  37. 37.🔋 A robot’s battery is at 50% and charging adds 25% every 10 minutes. How many minutes until it is full (100%)?
  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’s battery is at 0% and charging adds 10% every 10 minutes. How many minutes until it is full (100%)?
  40. 40.🔋 A robot’s battery is at 0% and charging adds 20% every 10 minutes. How many minutes until it is full (100%)?

Answer key

  1. 1
  2. 20
  3. 6
  4. 2
  5. 2
  6. a rechargeable battery
  7. 40
  8. 140
  9. a power cable
  10. 50
  11. 100
  12. 20
  13. 4.5
  14. 3
  15. 2
  16. goes back to its dock
  17. 3
  18. 12
  19. 2
  20. 3
  21. 6
  22. 40
  23. 50
  24. 10.5
  25. 12
  26. mAh
  27. 50
  28. 7
  29. 40
  30. 100
  31. 5
  32. 8
  33. 8
  34. 3
  35. 14
  36. 5
  37. 20
  38. 4
  39. 100
  40. 50

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