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Robotics Worksheet: Robot Batteries

Robotics lesson 4: Power for robots · Set 845 · 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 400 mAh and the robot uses 100 mA. For how many hours can it run?
  2. 2.🔋 A robot uses 10% of its battery every 4 minutes. How many minutes does a full battery (100%) last?
  3. 3.🔋 A robot uses 2% of its battery every 1 minute. How many minutes does a full battery (100%) last?
  4. 4.🔋 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%?
  5. 5.🔋 A robot uses 20% of its battery every 4 minutes. How many minutes does a full battery (100%) last?
  6. 6.🔋 A robot uses 2% of its battery every 4 minutes. How many minutes does a full battery (100%) last?
  7. 7.🔋 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%?
  8. 8.🔋 What does a robot vacuum do when its battery is low? (a) turns into a car (b) explodes (c) goes back to its dock (d) keeps going for ever
  9. 9.🔋 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
  10. 10.🔋 A robot’s battery is at 50% and charging adds 25% every 10 minutes. How many minutes until it is full (100%)?
  11. 11.🔋 A robot’s battery holds 750 mAh and the robot uses 250 mA. For how many hours can it run?
  12. 12.🔋 What powers most moving robots? (a) a candle (b) a tiny magnet (c) a rechargeable battery (d) a water tank
  13. 13.🔋 Many robots on far-away planets get energy from … (a) shop batteries (b) wind-up keys (c) petrol pumps (d) sunlight (solar panels)
  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.🔋 A robot’s battery holds 2000 mAh and the robot uses 500 mA. For how many hours can it run?
  16. 16.🔋 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%?
  17. 17.🔋 A robot’s battery is at 0% and charging adds 20% every 10 minutes. How many minutes until it is full (100%)?
  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 uses 20% of its battery every 2 minutes. How many minutes does a full battery (100%) last?
  20. 20.🔋 A robot runs on 6 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  21. 21.🔋 A robot uses 10% of its battery every 6 minutes. How many minutes does a full battery (100%) last?
  22. 22.🔋 A robot’s battery is at 60% and charging adds 20% every 10 minutes. How many minutes until it is full (100%)?
  23. 23.🔋 A robot uses 10% of its battery every 3 minutes. How many minutes does a full battery (100%) last?
  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’s battery is at 30%. Each lap of the track uses 5%. How many laps can it do before the battery reaches 0%?
  26. 26.🔋 A robot’s battery holds 3000 mAh and the robot uses 1000 mA. For how many hours can it run?
  27. 27.🔋 A robot’s battery holds 2000 mAh and the robot uses 250 mA. For how many hours can it run?
  28. 28.🔋 A robot’s battery is at 75% and charging adds 25% every 10 minutes. How many minutes until it is full (100%)?
  29. 29.🔋 A robot uses 25% of its battery every 6 minutes. How many minutes does a full battery (100%) last?
  30. 30.🔋 A robot uses 2% of its battery every 6 minutes. How many minutes does a full battery (100%) last?
  31. 31.🔋 A robot’s battery holds 2400 mAh and the robot uses 400 mA. For how many hours can it run?
  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 10%. Each lap of the track uses 5%. How many laps can it do before the battery reaches 0%?
  34. 34.🔋 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%?
  35. 35.🔋 A robot’s battery holds 400 mAh and the robot uses 200 mA. For how many hours can it run?
  36. 36.🔋 A robot’s battery is at 75%. Each lap of the track uses 5%. How many laps can it do before the battery reaches 0%?
  37. 37.🔋 A robot’s battery is at 75% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  38. 38.🔋 A robot’s battery holds 1000 mAh and the robot uses 200 mA. For how many hours can it run?
  39. 39.🔋 A robot’s battery holds 400 mAh and the robot uses 400 mA. For how many hours can it run?
  40. 40.🔋 A robot’s battery is at 80% and charging adds 10% every 10 minutes. How many minutes until it is full (100%)?

Answer key

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

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