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Robotics Worksheet: Robot Batteries

Robotics lesson 4: Power for robots · Set 96 · 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 holds 700 mAh and the robot uses 100 mA. For how many hours can it run?
  2. 2.🔋 A robot’s battery holds 750 mAh and the robot uses 250 mA. For how many hours can it run?
  3. 3.🔋 A robot uses 10% of its battery every 4 minutes. How many minutes does a full battery (100%) last?
  4. 4.🔋 A robot’s battery holds 1600 mAh and the robot uses 400 mA. For how many hours can it run?
  5. 5.🔋 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%?
  6. 6.🔋 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%?
  7. 7.🔋 A robot’s battery holds 1250 mAh and the robot uses 250 mA. For how many hours can it run?
  8. 8.🔋 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
  9. 9.🔋 A robot’s battery holds 600 mAh and the robot uses 200 mA. For how many hours can it run?
  10. 10.🔋 A robot’s battery holds 800 mAh and the robot uses 200 mA. For how many hours can it run?
  11. 11.🔋 A robot’s battery is at 80% and charging adds 20% every 10 minutes. How many minutes until it is full (100%)?
  12. 12.🔋 What powers most moving robots? (a) a rechargeable battery (b) a candle (c) a tiny magnet (d) a water tank
  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 is at 100%. Each lap of the track uses 25%. How many laps can it do before the battery reaches 0%?
  15. 15.🔋 A robot’s battery is at 100%. Each lap of the track uses 10%. How many laps can it do before the battery reaches 0%?
  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 is at 70% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  18. 18.🔋 A robot runs on 8 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  19. 19.🔋 A robot’s battery is at 40% and charging adds 10% every 10 minutes. How many minutes until it is full (100%)?
  20. 20.🔋 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%?
  21. 21.🔋 A robot uses 25% of its battery every 6 minutes. How many minutes does a full battery (100%) last?
  22. 22.🔋 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%?
  23. 23.🔋 Battery capacity (how much it holds) is often written in … (a) km (b) mAh (c) °C (d) kg
  24. 24.🔋 A robot uses 4% of its battery every 2 minutes. How many minutes does a full battery (100%) last?
  25. 25.🔋 A robot uses 2% of its battery every 1 minute. How many minutes does a full battery (100%) last?
  26. 26.🔋 A robot uses 25% of its battery every 5 minutes. How many minutes does a full battery (100%) last?
  27. 27.🔋 A robot runs on 7 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  28. 28.🔋 A robot’s battery is at 0% and charging adds 25% every 10 minutes. How many minutes until it is full (100%)?
  29. 29.🔋 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%?
  30. 30.🔋 A robot uses 4% of its battery every 5 minutes. How many minutes does a full battery (100%) last?
  31. 31.🔋 A robot’s battery is at 30% and charging adds 10% every 10 minutes. How many minutes until it is full (100%)?
  32. 32.🔋 Many robots on far-away planets get energy from … (a) shop batteries (b) wind-up keys (c) petrol pumps (d) sunlight (solar panels)
  33. 33.🔋 A robot’s battery is at 100%. Each lap of the track uses 5%. How many laps can it do before the battery reaches 0%?
  34. 34.🔋 A robot uses 10% of its battery every 1 minute. How many minutes does a full battery (100%) last?
  35. 35.🔋 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
  36. 36.🔋 A robot’s battery holds 3000 mAh and the robot uses 1000 mA. For how many hours can it run?
  37. 37.🔋 A robot’s battery is at 20% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  38. 38.🔋 A robot uses 20% of its battery every 1 minute. How many minutes does a full battery (100%) last?
  39. 39.🔋 A robot uses 4% of its battery every 1 minute. How many minutes does a full battery (100%) last?
  40. 40.🔋 A robot’s battery is at 60% and charging adds 20% every 10 minutes. How many minutes until it is full (100%)?

Answer key

  1. 7
  2. 3
  3. 40
  4. 4
  5. 2
  6. 2
  7. 5
  8. a power cable
  9. 3
  10. 4
  11. 10
  12. a rechargeable battery
  13. 30
  14. 4
  15. 10
  16. 6
  17. 60
  18. 12
  19. 60
  20. 3
  21. 24
  22. 3
  23. mAh
  24. 50
  25. 50
  26. 20
  27. 10.5
  28. 40
  29. 5
  30. 125
  31. 70
  32. sunlight (solar panels)
  33. 20
  34. 10
  35. goes back to its dock
  36. 3
  37. 160
  38. 5
  39. 25
  40. 20

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