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Robotics Worksheet: Robot Batteries

Robotics lesson 4: Power for robots · Set 269 · 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 4000 mAh and the robot uses 500 mA. For how many hours can it run?
  2. 2.🔋 A robot uses 25% of its battery every 1 minute. How many minutes does a full battery (100%) last?
  3. 3.🔋 A robot’s battery holds 1600 mAh and the robot uses 200 mA. For how many hours can it run?
  4. 4.🔋 A robot uses 20% of its battery every 1 minute. How many minutes does a full battery (100%) last?
  5. 5.🔋 A robot runs on 6 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  6. 6.🔋 A robot uses 10% of its battery every 3 minutes. How many minutes does a full battery (100%) last?
  7. 7.🔋 What powers most moving robots? (a) a water tank (b) a rechargeable battery (c) a tiny magnet (d) a candle
  8. 8.🔋 A robot’s battery is at 20%. Each lap of the track uses 5%. How many laps can it do before the battery reaches 0%?
  9. 9.🔋 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%?
  10. 10.🔋 A robot uses 2% of its battery every 5 minutes. How many minutes does a full battery (100%) last?
  11. 11.🔋 A robot’s battery holds 5000 mAh and the robot uses 1000 mA. For how many hours can it run?
  12. 12.🔋 A robot’s battery is at 90% and charging adds 10% every 10 minutes. How many minutes until it is full (100%)?
  13. 13.🔋 Battery capacity (how much it holds) is often written in … (a) km (b) °C (c) mAh (d) kg
  14. 14.🔋 What should you do with a swollen or damaged robot battery? (a) give it to an adult (b) charge it again (c) squeeze it flat (d) throw it in a fire
  15. 15.🔋 What does a robot vacuum do when its battery is low? (a) turns into a car (b) goes back to its dock (c) keeps going for ever (d) explodes
  16. 16.🔋 Many robots on far-away planets get energy from … (a) shop batteries (b) sunlight (solar panels) (c) wind-up keys (d) petrol pumps
  17. 17.🔋 A robot arm bolted to a factory floor usually gets its power from … (a) a wind-up key (b) a power cable (c) a coin cell (d) a solar panel
  18. 18.🔋 A robot uses 5% of its battery every 1 minute. How many minutes does a full battery (100%) last?
  19. 19.🔋 A robot’s battery holds 2000 mAh and the robot uses 250 mA. For how many hours can it run?
  20. 20.🔋 A robot’s battery holds 1500 mAh and the robot uses 500 mA. For how many hours can it run?
  21. 21.🔋 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%?
  22. 22.🔋 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%?
  23. 23.🔋 A robot runs on 8 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  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 runs on 7 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  26. 26.🔋 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%?
  27. 27.🔋 A robot uses 2% of its battery every 4 minutes. How many minutes does a full battery (100%) last?
  28. 28.🔋 A robot uses 2% of its battery every 1 minute. How many minutes does a full battery (100%) last?
  29. 29.🔋 A robot’s battery is at 80% and charging adds 10% every 10 minutes. How many minutes until it is full (100%)?
  30. 30.🔋 A robot’s battery is at 40% and charging adds 20% every 10 minutes. How many minutes until it is full (100%)?
  31. 31.🔋 A robot’s battery is at 60% and charging adds 20% every 10 minutes. How many minutes until it is full (100%)?
  32. 32.🔋 A robot uses 10% of its battery every 2 minutes. How many minutes does a full battery (100%) last?
  33. 33.🔋 A robot’s battery holds 600 mAh and the robot uses 100 mA. For how many hours can it run?
  34. 34.🔋 A robot uses 25% of its battery every 4 minutes. How many minutes does a full battery (100%) last?
  35. 35.🔋 A robot’s battery holds 2800 mAh and the robot uses 400 mA. For how many hours can it run?
  36. 36.🔋 A robot’s battery is at 80% and charging adds 20% every 10 minutes. How many minutes until it is full (100%)?
  37. 37.🔋 A robot uses 4% of its battery every 5 minutes. How many minutes does a full battery (100%) last?
  38. 38.🔋 A robot uses 20% of its battery every 4 minutes. How many minutes does a full battery (100%) last?
  39. 39.🔋 A robot uses 2% of its battery every 3 minutes. How many minutes does a full battery (100%) last?
  40. 40.🔋 A robot’s battery is at 20% and charging adds 10% every 10 minutes. How many minutes until it is full (100%)?

Answer key

  1. 8
  2. 4
  3. 8
  4. 5
  5. 9
  6. 30
  7. a rechargeable battery
  8. 4
  9. 3
  10. 250
  11. 5
  12. 10
  13. mAh
  14. give it to an adult
  15. goes back to its dock
  16. sunlight (solar panels)
  17. a power cable
  18. 20
  19. 8
  20. 3
  21. 3
  22. 3
  23. 12
  24. 4.5
  25. 10.5
  26. 8
  27. 200
  28. 50
  29. 20
  30. 30
  31. 20
  32. 20
  33. 6
  34. 16
  35. 7
  36. 10
  37. 125
  38. 20
  39. 150
  40. 80

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