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Robotics Worksheet: Robot Batteries

Robotics lesson 4: Power for robots · Set 566 · 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 uses 2% of its battery every 2 minutes. How many minutes does a full battery (100%) last?
  2. 2.🔋 A robot uses 5% of its battery every 6 minutes. How many minutes does a full battery (100%) last?
  3. 3.🔋 A robot’s battery holds 700 mAh and the robot uses 100 mA. For how many hours can it run?
  4. 4.🔋 What powers most moving robots? (a) a water tank (b) a rechargeable battery (c) a tiny magnet (d) a candle
  5. 5.🔋 A robot’s battery is at 60%. Each lap of the track uses 10%. How many laps can it do before the battery reaches 0%?
  6. 6.🔋 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%?
  7. 7.🔋 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%?
  8. 8.🔋 A robot’s battery is at 40% and charging adds 20% every 10 minutes. How many minutes until it is full (100%)?
  9. 9.🔋 A robot’s battery is at 80% and charging adds 10% every 10 minutes. How many minutes until it is full (100%)?
  10. 10.🔋 A robot’s battery holds 3200 mAh and the robot uses 400 mA. For how many hours can it run?
  11. 11.🔋 A robot’s battery is at 50% and charging adds 25% every 10 minutes. How many minutes until it is full (100%)?
  12. 12.🔋 A robot’s battery holds 400 mAh and the robot uses 100 mA. For how many hours can it run?
  13. 13.🔋 A robot’s battery is at 95%. Each lap of the track uses 5%. How many laps can it do before the battery reaches 0%?
  14. 14.🔋 A robot’s battery is at 20% and charging adds 20% every 10 minutes. How many minutes until it is full (100%)?
  15. 15.🔋 A robot runs on 8 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  16. 16.🔋 A robot runs on 4 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  17. 17.🔋 A robot’s battery holds 1000 mAh and the robot uses 200 mA. For how many hours can it run?
  18. 18.🔋 A robot runs on 5 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  19. 19.🔋 What does a robot vacuum do when its battery is low? (a) explodes (b) keeps going for ever (c) turns into a car (d) goes back to its dock
  20. 20.🔋 A robot’s battery is at 25% and charging adds 25% every 10 minutes. How many minutes until it is full (100%)?
  21. 21.🔋 A robot runs on 6 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  22. 22.🔋 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%?
  23. 23.🔋 A robot’s battery is at 30% and charging adds 10% every 10 minutes. How many minutes until it is full (100%)?
  24. 24.🔋 A robot uses 2% of its battery every 4 minutes. How many minutes does a full battery (100%) last?
  25. 25.🔋 A robot uses 5% of its battery every 2 minutes. How many minutes does a full battery (100%) last?
  26. 26.🔋 A robot’s battery is at 0% and charging adds 25% every 10 minutes. How many minutes until it is full (100%)?
  27. 27.🔋 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%?
  28. 28.🔋 A robot’s battery holds 2500 mAh and the robot uses 500 mA. For how many hours can it run?
  29. 29.🔋 A robot uses 10% of its battery every 6 minutes. How many minutes does a full battery (100%) last?
  30. 30.🔋 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%?
  31. 31.🔋 A robot’s battery holds 600 mAh and the robot uses 100 mA. For how many hours can it run?
  32. 32.🔋 A robot’s battery is at 70% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  33. 33.🔋 A robot’s battery holds 2000 mAh and the robot uses 400 mA. For how many hours can it run?
  34. 34.🔋 A robot’s battery is at 35%. Each lap of the track uses 5%. How many laps can it do before the battery reaches 0%?
  35. 35.🔋 A robot’s battery holds 2000 mAh and the robot uses 500 mA. For how many hours can it run?
  36. 36.🔋 A robot’s battery holds 7000 mAh and the robot uses 1000 mA. For how many hours can it run?
  37. 37.🔋 Battery capacity (how much it holds) is often written in … (a) km (b) mAh (c) °C (d) kg
  38. 38.🔋 A robot uses 2% of its battery every 1 minute. How many minutes does a full battery (100%) last?
  39. 39.🔋 A robot’s battery is at 80% and charging adds 20% every 10 minutes. How many minutes until it is full (100%)?
  40. 40.🔋 A robot’s battery holds 400 mAh and the robot uses 400 mA. For how many hours can it run?

Answer key

  1. 100
  2. 120
  3. 7
  4. a rechargeable battery
  5. 6
  6. 5
  7. 18
  8. 30
  9. 20
  10. 8
  11. 20
  12. 4
  13. 19
  14. 40
  15. 12
  16. 6
  17. 5
  18. 7.5
  19. goes back to its dock
  20. 30
  21. 9
  22. 5
  23. 70
  24. 200
  25. 40
  26. 40
  27. 2
  28. 5
  29. 60
  30. 16
  31. 6
  32. 60
  33. 5
  34. 7
  35. 4
  36. 7
  37. mAh
  38. 50
  39. 10
  40. 1

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