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Robotics Worksheet: Robot Batteries

Robotics lesson 4: Power for robots · Set 122 · 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 10% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  2. 2.🔋 A robot uses 2% of its battery every 6 minutes. How many minutes does a full battery (100%) last?
  3. 3.🔋 What does a robot vacuum do when its battery is low? (a) explodes (b) turns into a car (c) keeps going for ever (d) goes back to its dock
  4. 4.🔋 A robot uses 2% of its battery every 2 minutes. How many minutes does a full battery (100%) last?
  5. 5.🔋 Battery capacity (how much it holds) is often written in … (a) kg (b) mAh (c) °C (d) km
  6. 6.🔋 A robot’s battery holds 800 mAh and the robot uses 200 mA. For how many hours can it run?
  7. 7.🔋 A robot uses 20% of its battery every 5 minutes. How many minutes does a full battery (100%) last?
  8. 8.🔋 A robot runs on 2 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  9. 9.🔋 A robot’s battery holds 6000 mAh and the robot uses 1000 mA. For how many hours can it run?
  10. 10.🔋 A robot’s battery is at 30%. Each lap of the track uses 5%. How many laps can it do before the battery reaches 0%?
  11. 11.🔋 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%?
  12. 12.🔋 A robot runs on 8 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  13. 13.🔋 A robot’s battery is at 60% and charging adds 20% every 10 minutes. How many minutes until it is full (100%)?
  14. 14.🔋 What powers most moving robots? (a) a candle (b) a tiny magnet (c) a rechargeable battery (d) a water tank
  15. 15.🔋 A robot uses 10% of its battery every 2 minutes. How many minutes does a full battery (100%) last?
  16. 16.🔋 A robot uses 5% of its battery every 3 minutes. How many minutes does a full battery (100%) last?
  17. 17.🔋 A robot’s battery is at 25% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  18. 18.🔋 Many robots on far-away planets get energy from … (a) shop batteries (b) petrol pumps (c) wind-up keys (d) sunlight (solar panels)
  19. 19.🔋 A robot’s battery holds 3200 mAh and the robot uses 400 mA. For how many hours can it run?
  20. 20.🔋 A robot’s battery holds 1750 mAh and the robot uses 250 mA. For how many hours can it run?
  21. 21.🔋 A robot’s battery is at 30% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  22. 22.🔋 A robot runs on 7 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  23. 23.🔋 A robot’s battery holds 250 mAh and the robot uses 250 mA. For how many hours can it run?
  24. 24.🔋 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%?
  25. 25.🔋 A robot’s battery holds 750 mAh and the robot uses 250 mA. For how many hours can it run?
  26. 26.🔋 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%?
  27. 27.🔋 A robot uses 20% of its battery every 3 minutes. How many minutes does a full battery (100%) last?
  28. 28.🔋 A robot uses 10% of its battery every 6 minutes. How many minutes does a full battery (100%) last?
  29. 29.🔋 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%?
  30. 30.🔋 A robot’s battery holds 2000 mAh and the robot uses 400 mA. For how many hours can it run?
  31. 31.🔋 A robot uses 5% of its battery every 1 minute. How many minutes does a full battery (100%) last?
  32. 32.🔋 A robot’s battery holds 600 mAh and the robot uses 200 mA. For how many hours can it run?
  33. 33.🔋 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%?
  34. 34.🔋 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%?
  35. 35.🔋 A robot’s battery holds 500 mAh and the robot uses 250 mA. For how many hours can it run?
  36. 36.🔋 A robot runs on 4 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  37. 37.🔋 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%?
  38. 38.🔋 A robot runs on 3 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  39. 39.🔋 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%?
  40. 40.🔋 A robot’s battery holds 3000 mAh and the robot uses 1000 mA. For how many hours can it run?

Answer key

  1. 180
  2. 300
  3. goes back to its dock
  4. 100
  5. mAh
  6. 4
  7. 25
  8. 3
  9. 6
  10. 6
  11. 2
  12. 12
  13. 20
  14. a rechargeable battery
  15. 20
  16. 60
  17. 150
  18. sunlight (solar panels)
  19. 8
  20. 7
  21. 140
  22. 10.5
  23. 1
  24. 3
  25. 3
  26. 4
  27. 15
  28. 60
  29. 9
  30. 5
  31. 20
  32. 3
  33. 6
  34. 4
  35. 2
  36. 6
  37. 19
  38. 4.5
  39. 3
  40. 3

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