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Robotics Worksheet: Robot Batteries

Robotics lesson 4: Power for robots · Set 15 · 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 40%. Each lap of the track uses 20%. How many laps can it do before the battery reaches 0%?
  2. 2.🔋 What does a robot vacuum do when its battery is low? (a) explodes (b) goes back to its dock (c) keeps going for ever (d) turns into a car
  3. 3.🔋 A robot’s battery is at 5% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  4. 4.🔋 A robot uses 20% of its battery every 6 minutes. How many minutes does a full battery (100%) last?
  5. 5.🔋 A robot arm bolted to a factory floor usually gets its power from … (a) a wind-up key (b) a coin cell (c) a solar panel (d) a power cable
  6. 6.🔋 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%?
  7. 7.🔋 A robot runs on 5 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  8. 8.🔋 A robot uses 4% of its battery every 2 minutes. How many minutes does a full battery (100%) last?
  9. 9.🔋 A robot’s battery holds 1750 mAh and the robot uses 250 mA. For how many hours can it run?
  10. 10.🔋 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%?
  11. 11.🔋 A robot uses 10% of its battery every 2 minutes. How many minutes does a full battery (100%) last?
  12. 12.🔋 A robot’s battery is at 25% and charging adds 25% every 10 minutes. How many minutes until it is full (100%)?
  13. 13.🔋 A robot’s battery is at 40% and charging adds 20% every 10 minutes. How many minutes until it is full (100%)?
  14. 14.🔋 A robot’s battery holds 2000 mAh and the robot uses 400 mA. For how many hours can it run?
  15. 15.🔋 Many robots on far-away planets get energy from … (a) wind-up keys (b) sunlight (solar panels) (c) petrol pumps (d) shop batteries
  16. 16.🔋 A robot’s battery holds 700 mAh and the robot uses 100 mA. For how many hours can it run?
  17. 17.🔋 Battery capacity (how much it holds) is often written in … (a) km (b) kg (c) °C (d) mAh
  18. 18.🔋 A robot’s battery holds 200 mAh and the robot uses 200 mA. For how many hours can it run?
  19. 19.🔋 A robot’s battery is at 85%. Each lap of the track uses 5%. How many laps can it do before the battery reaches 0%?
  20. 20.🔋 A robot’s battery holds 800 mAh and the robot uses 400 mA. For how many hours can it run?
  21. 21.🔋 A robot uses 2% of its battery every 4 minutes. How many minutes does a full battery (100%) last?
  22. 22.🔋 A robot uses 10% of its battery every 6 minutes. How many minutes does a full battery (100%) last?
  23. 23.🔋 A robot uses 20% of its battery every 5 minutes. How many minutes does a full battery (100%) last?
  24. 24.🔋 A robot runs on 3 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  25. 25.🔋 A robot uses 4% of its battery every 1 minute. How many minutes does a full battery (100%) last?
  26. 26.🔋 A robot’s battery is at 10%. Each lap of the track uses 5%. How many laps can it do before the battery reaches 0%?
  27. 27.🔋 A robot uses 25% of its battery every 1 minute. How many minutes does a full battery (100%) last?
  28. 28.🔋 A robot uses 2% of its battery every 2 minutes. How many minutes does a full battery (100%) last?
  29. 29.🔋 A robot uses 5% of its battery every 3 minutes. How many minutes does a full battery (100%) last?
  30. 30.🔋 A robot’s battery is at 80% and charging adds 10% every 10 minutes. How many minutes until it is full (100%)?
  31. 31.🔋 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%?
  32. 32.🔋 A robot’s battery is at 0% and charging adds 25% every 10 minutes. How many minutes until it is full (100%)?
  33. 33.🔋 A robot’s battery is at 60% and charging adds 20% every 10 minutes. How many minutes until it is full (100%)?
  34. 34.🔋 What powers most moving robots? (a) a candle (b) a rechargeable battery (c) a tiny magnet (d) a water tank
  35. 35.🔋 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%?
  36. 36.🔋 A robot’s battery is at 0% and charging adds 20% every 10 minutes. How many minutes until it is full (100%)?
  37. 37.🔋 A robot’s battery is at 10% and charging adds 10% every 10 minutes. How many minutes until it is full (100%)?
  38. 38.🔋 A robot uses 25% of its battery every 5 minutes. How many minutes does a full battery (100%) last?
  39. 39.🔋 A robot uses 2% of its battery every 1 minute. How many minutes does a full battery (100%) last?
  40. 40.🔋 A robot’s battery holds 2500 mAh and the robot uses 500 mA. For how many hours can it run?

Answer key

  1. 2
  2. goes back to its dock
  3. 190
  4. 30
  5. a power cable
  6. 3
  7. 7.5
  8. 50
  9. 7
  10. 5
  11. 20
  12. 30
  13. 30
  14. 5
  15. sunlight (solar panels)
  16. 7
  17. mAh
  18. 1
  19. 17
  20. 2
  21. 200
  22. 60
  23. 25
  24. 4.5
  25. 25
  26. 2
  27. 4
  28. 100
  29. 60
  30. 20
  31. 2
  32. 40
  33. 20
  34. a rechargeable battery
  35. 6
  36. 50
  37. 90
  38. 20
  39. 50
  40. 5

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