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Robotics Worksheet: Robot Batteries

Robotics lesson 4: Power for robots · Set 331 · 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 10% of its battery every 3 minutes. How many minutes does a full battery (100%) last?
  2. 2.🔋 A robot’s battery is at 40%. Each lap of the track uses 10%. How many laps can it do before the battery reaches 0%?
  3. 3.🔋 A robot’s battery is at 60%. Each lap of the track uses 20%. How many laps can it do before the battery reaches 0%?
  4. 4.🔋 A robot uses 5% of its battery every 1 minute. How many minutes does a full battery (100%) last?
  5. 5.🔋 A robot’s battery is at 75% and charging adds 25% every 10 minutes. How many minutes until it is full (100%)?
  6. 6.🔋 What powers most moving robots? (a) a water tank (b) a candle (c) a rechargeable battery (d) a tiny magnet
  7. 7.🔋 A robot uses 2% of its battery every 3 minutes. How many minutes does a full battery (100%) last?
  8. 8.🔋 A robot’s battery holds 2000 mAh and the robot uses 250 mA. For how many hours can it run?
  9. 9.🔋 A robot runs on 4 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  10. 10.🔋 A robot’s battery holds 800 mAh and the robot uses 400 mA. For how many hours can it run?
  11. 11.🔋 Many robots on far-away planets get energy from … (a) sunlight (solar panels) (b) shop batteries (c) petrol pumps (d) wind-up keys
  12. 12.🔋 What does a robot vacuum do when its battery is low? (a) turns into a car (b) keeps going for ever (c) goes back to its dock (d) explodes
  13. 13.🔋 A robot uses 4% of its battery every 6 minutes. How many minutes does a full battery (100%) last?
  14. 14.🔋 A robot’s battery is at 0% and charging adds 20% every 10 minutes. How many minutes until it is full (100%)?
  15. 15.🔋 A robot’s battery holds 100 mAh and the robot uses 100 mA. For how many hours can it run?
  16. 16.🔋 A robot’s battery holds 2800 mAh and the robot uses 400 mA. For how many hours can it run?
  17. 17.🔋 A robot’s battery holds 1750 mAh and the robot uses 250 mA. For how many hours can it run?
  18. 18.🔋 Battery capacity (how much it holds) is often written in … (a) kg (b) mAh (c) °C (d) km
  19. 19.🔋 A robot uses 10% of its battery every 4 minutes. How many minutes does a full battery (100%) last?
  20. 20.🔋 A robot runs on 8 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  21. 21.🔋 A robot’s battery holds 4000 mAh and the robot uses 1000 mA. For how many hours can it run?
  22. 22.🔋 A robot’s battery is at 45% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  23. 23.🔋 A robot’s battery is at 0% and charging adds 25% every 10 minutes. How many minutes until it is full (100%)?
  24. 24.🔋 A robot’s battery is at 60% and charging adds 10% every 10 minutes. How many minutes until it is full (100%)?
  25. 25.🔋 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%?
  26. 26.🔋 A robot uses 20% of its battery every 3 minutes. How many minutes does a full battery (100%) last?
  27. 27.🔋 A robot’s battery holds 2400 mAh and the robot uses 400 mA. For how many hours can it run?
  28. 28.🔋 A robot’s battery is at 50%. Each lap of the track uses 5%. How many laps can it do before the battery reaches 0%?
  29. 29.🔋 A robot’s battery holds 800 mAh and the robot uses 200 mA. For how many hours can it run?
  30. 30.🔋 A robot uses 10% of its battery every 1 minute. How many minutes does a full battery (100%) last?
  31. 31.🔋 A robot’s battery is at 20% and charging adds 20% every 10 minutes. How many minutes until it is full (100%)?
  32. 32.🔋 A robot uses 25% of its battery every 5 minutes. How many minutes does a full battery (100%) last?
  33. 33.🔋 A robot uses 4% of its battery every 4 minutes. How many minutes does a full battery (100%) last?
  34. 34.🔋 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%?
  35. 35.🔋 A robot’s battery holds 600 mAh and the robot uses 100 mA. For how many hours can it run?
  36. 36.🔋 A robot’s battery is at 30%. Each lap of the track uses 10%. How many laps can it do before the battery reaches 0%?
  37. 37.🔋 A robot’s battery is at 50% and charging adds 10% every 10 minutes. How many minutes until it is full (100%)?
  38. 38.🔋 A robot’s battery is at 65% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  39. 39.🔋 A robot runs on 6 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  40. 40.🔋 A robot’s battery holds 2000 mAh and the robot uses 500 mA. For how many hours can it run?

Answer key

  1. 30
  2. 4
  3. 3
  4. 20
  5. 10
  6. a rechargeable battery
  7. 150
  8. 8
  9. 6
  10. 2
  11. sunlight (solar panels)
  12. goes back to its dock
  13. 150
  14. 50
  15. 1
  16. 7
  17. 7
  18. mAh
  19. 40
  20. 12
  21. 4
  22. 110
  23. 40
  24. 40
  25. 9
  26. 15
  27. 6
  28. 10
  29. 4
  30. 10
  31. 40
  32. 20
  33. 100
  34. 5
  35. 6
  36. 3
  37. 50
  38. 70
  39. 9
  40. 4

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