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Robotics Worksheet: Robot Batteries

Robotics lesson 4: Power for robots · Set 715 · 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 100%. Each lap of the track uses 20%. How many laps can it do before the battery reaches 0%?
  2. 2.🔋 A robot’s battery holds 800 mAh and the robot uses 100 mA. For how many hours can it run?
  3. 3.🔋 A robot uses 25% of its battery every 2 minutes. How many minutes does a full battery (100%) last?
  4. 4.🔋 A robot’s battery holds 1750 mAh and the robot uses 250 mA. For how many hours can it run?
  5. 5.🔋 A robot’s battery is at 0% and charging adds 25% every 10 minutes. How many minutes until it is full (100%)?
  6. 6.🔋 A robot’s battery holds 400 mAh and the robot uses 400 mA. For how many hours can it run?
  7. 7.🔋 A robot uses 10% of its battery every 5 minutes. How many minutes does a full battery (100%) last?
  8. 8.🔋 Battery capacity (how much it holds) is often written in … (a) kg (b) °C (c) km (d) mAh
  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 arm bolted to a factory floor usually gets its power from … (a) a coin cell (b) a power cable (c) a solar panel (d) a wind-up key
  11. 11.🔋 Many robots on far-away planets get energy from … (a) sunlight (solar panels) (b) wind-up keys (c) shop batteries (d) petrol pumps
  12. 12.🔋 A robot’s battery is at 90% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  13. 13.🔋 A robot’s battery is at 80% and charging adds 20% every 10 minutes. How many minutes until it is full (100%)?
  14. 14.🔋 A robot’s battery holds 200 mAh and the robot uses 200 mA. For how many hours can it run?
  15. 15.🔋 A robot’s battery holds 1250 mAh and the robot uses 250 mA. For how many hours can it run?
  16. 16.🔋 What powers most moving robots? (a) a tiny magnet (b) a water tank (c) a candle (d) a rechargeable battery
  17. 17.🔋 A robot uses 20% of its battery every 3 minutes. How many minutes does a full battery (100%) last?
  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 uses 20% of its battery every 4 minutes. How many minutes does a full battery (100%) last?
  20. 20.🔋 A robot’s battery is at 40% and charging adds 10% every 10 minutes. How many minutes until it is full (100%)?
  21. 21.🔋 A robot uses 20% of its battery every 5 minutes. How many minutes does a full battery (100%) last?
  22. 22.🔋 A robot’s battery is at 70%. Each lap of the track uses 5%. How many laps can it do before the battery reaches 0%?
  23. 23.🔋 A robot runs on 2 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  24. 24.🔋 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%?
  25. 25.🔋 A robot uses 10% of its battery every 6 minutes. How many minutes does a full battery (100%) last?
  26. 26.🔋 A robot’s battery holds 1600 mAh and the robot uses 200 mA. For how many hours can it run?
  27. 27.🔋 A robot’s battery is at 0% and charging adds 10% every 10 minutes. How many minutes until it is full (100%)?
  28. 28.🔋 A robot’s battery is at 20%. Each lap of the track uses 10%. How many laps can it do before the battery reaches 0%?
  29. 29.🔋 A robot runs on 5 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  30. 30.🔋 A robot’s battery holds 600 mAh and the robot uses 100 mA. For how many hours can it run?
  31. 31.🔋 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%?
  32. 32.🔋 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
  33. 33.🔋 A robot runs on 3 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  34. 34.🔋 A robot runs on 6 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  35. 35.🔋 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%?
  36. 36.🔋 A robot’s battery is at 0% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  37. 37.🔋 What should you do with a swollen or damaged robot battery? (a) throw it in a fire (b) give it to an adult (c) squeeze it flat (d) charge it again
  38. 38.🔋 A robot’s battery is at 0% and charging adds 20% every 10 minutes. How many minutes until it is full (100%)?
  39. 39.🔋 A robot’s battery is at 75% and charging adds 25% every 10 minutes. How many minutes until it is full (100%)?
  40. 40.🔋 A robot uses 20% of its battery every 6 minutes. How many minutes does a full battery (100%) last?

Answer key

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

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