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Robotics Worksheet: Robot Batteries

Robotics lesson 4: Power for robots · Set 693 · 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 2 minutes. How many minutes does a full battery (100%) last?
  2. 2.🔋 What powers most moving robots? (a) a candle (b) a water tank (c) a rechargeable battery (d) a tiny magnet
  3. 3.🔋 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%?
  4. 4.🔋 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%?
  5. 5.🔋 A robot uses 2% of its battery every 6 minutes. How many minutes does a full battery (100%) last?
  6. 6.🔋 A robot’s battery is at 50% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  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 is at 0% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  9. 9.🔋 A robot’s battery holds 200 mAh and the robot uses 100 mA. For how many hours can it run?
  10. 10.🔋 A robot uses 20% of its battery every 4 minutes. How many minutes does a full battery (100%) last?
  11. 11.🔋 A robot’s battery holds 2400 mAh and the robot uses 400 mA. For how many hours can it run?
  12. 12.🔋 A robot’s battery holds 3000 mAh and the robot uses 1000 mA. For how many hours can it run?
  13. 13.🔋 A robot uses 4% of its battery every 2 minutes. How many minutes does a full battery (100%) last?
  14. 14.🔋 A robot uses 10% of its battery every 6 minutes. How many minutes does a full battery (100%) last?
  15. 15.🔋 A robot uses 10% of its battery every 3 minutes. How many minutes does a full battery (100%) last?
  16. 16.🔋 A robot runs on 8 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  17. 17.🔋 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%?
  18. 18.🔋 A robot uses 20% of its battery every 1 minute. How many minutes does a full battery (100%) last?
  19. 19.🔋 A robot runs on 7 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  20. 20.🔋 Many robots on far-away planets get energy from … (a) wind-up keys (b) shop batteries (c) sunlight (solar panels) (d) petrol pumps
  21. 21.🔋 Battery capacity (how much it holds) is often written in … (a) mAh (b) km (c) kg (d) °C
  22. 22.🔋 What does a robot vacuum do when its battery is low? (a) keeps going for ever (b) turns into a car (c) explodes (d) goes back to its dock
  23. 23.🔋 A robot’s battery holds 800 mAh and the robot uses 400 mA. For how many hours can it run?
  24. 24.🔋 A robot runs on 2 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  25. 25.🔋 A robot runs on 6 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  26. 26.🔋 A robot’s battery holds 750 mAh and the robot uses 250 mA. For how many hours can it run?
  27. 27.🔋 A robot’s battery is at 0% and charging adds 25% every 10 minutes. How many minutes until it is full (100%)?
  28. 28.🔋 A robot runs on 4 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  29. 29.🔋 A robot’s battery is at 25% and charging adds 25% every 10 minutes. How many minutes until it is full (100%)?
  30. 30.🔋 A robot uses 25% of its battery every 2 minutes. How many minutes does a full battery (100%) last?
  31. 31.🔋 A robot uses 4% of its battery every 3 minutes. How many minutes does a full battery (100%) last?
  32. 32.🔋 A robot’s battery holds 2000 mAh and the robot uses 1000 mA. For how many hours can it run?
  33. 33.🔋 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%?
  34. 34.🔋 A robot’s battery holds 7000 mAh and the robot uses 1000 mA. For how many hours can it run?
  35. 35.🔋 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%?
  36. 36.🔋 A robot uses 5% of its battery every 2 minutes. How many minutes does a full battery (100%) last?
  37. 37.🔋 A robot uses 5% of its battery every 3 minutes. How many minutes does a full battery (100%) last?
  38. 38.🔋 A robot runs on 5 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  39. 39.🔋 A robot uses 4% of its battery every 5 minutes. How many minutes does a full battery (100%) last?
  40. 40.🔋 A robot uses 4% of its battery every 4 minutes. How many minutes does a full battery (100%) last?

Answer key

  1. 20
  2. a rechargeable battery
  3. 2
  4. 8
  5. 300
  6. 100
  7. 150
  8. 200
  9. 2
  10. 20
  11. 6
  12. 3
  13. 50
  14. 60
  15. 30
  16. 12
  17. 4
  18. 5
  19. 10.5
  20. sunlight (solar panels)
  21. mAh
  22. goes back to its dock
  23. 2
  24. 3
  25. 9
  26. 3
  27. 40
  28. 6
  29. 30
  30. 8
  31. 75
  32. 2
  33. 3
  34. 7
  35. 5
  36. 40
  37. 60
  38. 7.5
  39. 125
  40. 100

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