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Robotics Worksheet: Robot Batteries

Robotics lesson 4: Power for robots · Set 924 · 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 10% and charging adds 10% every 10 minutes. How many minutes until it is full (100%)?
  2. 2.🔋 What should you do with a swollen or damaged robot battery? (a) throw it in a fire (b) squeeze it flat (c) give it to an adult (d) charge it again
  3. 3.🔋 Many robots on far-away planets get energy from … (a) petrol pumps (b) shop batteries (c) wind-up keys (d) sunlight (solar panels)
  4. 4.🔋 A robot uses 25% of its battery every 2 minutes. How many minutes does a full battery (100%) last?
  5. 5.🔋 A robot’s battery holds 400 mAh and the robot uses 400 mA. For how many hours can it run?
  6. 6.🔋 What powers most moving robots? (a) a tiny magnet (b) a water tank (c) a candle (d) a rechargeable battery
  7. 7.🔋 A robot’s battery holds 2000 mAh and the robot uses 500 mA. For how many hours can it run?
  8. 8.🔋 A robot’s battery holds 1000 mAh and the robot uses 1000 mA. For how many hours can it run?
  9. 9.🔋 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%?
  10. 10.🔋 A robot arm bolted to a factory floor usually gets its power from … (a) a coin cell (b) a solar panel (c) a wind-up key (d) a power cable
  11. 11.🔋 A robot uses 4% of its battery every 6 minutes. How many minutes does a full battery (100%) last?
  12. 12.🔋 A robot uses 25% of its battery every 1 minute. How many minutes does a full battery (100%) last?
  13. 13.🔋 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%?
  14. 14.🔋 A robot uses 10% of its battery every 1 minute. How many minutes does a full battery (100%) last?
  15. 15.🔋 A robot’s battery is at 15%. Each lap of the track uses 5%. How many laps can it do before the battery reaches 0%?
  16. 16.🔋 A robot’s battery is at 0% and charging adds 25% every 10 minutes. How many minutes until it is full (100%)?
  17. 17.🔋 A robot uses 20% of its battery every 4 minutes. How many minutes does a full battery (100%) last?
  18. 18.🔋 Battery capacity (how much it holds) is often written in … (a) °C (b) km (c) mAh (d) kg
  19. 19.🔋 A robot’s battery is at 20% and charging adds 20% every 10 minutes. How many minutes until it is full (100%)?
  20. 20.🔋 What does a robot vacuum do when its battery is low? (a) keeps going for ever (b) explodes (c) goes back to its dock (d) turns into a car
  21. 21.🔋 A robot uses 4% of its battery every 1 minute. How many minutes does a full battery (100%) last?
  22. 22.🔋 A robot’s battery holds 750 mAh and the robot uses 250 mA. For how many hours can it run?
  23. 23.🔋 A robot’s battery holds 2000 mAh and the robot uses 400 mA. For how many hours can it run?
  24. 24.🔋 A robot uses 25% of its battery every 4 minutes. How many minutes does a full battery (100%) last?
  25. 25.🔋 A robot’s battery is at 20% and charging adds 10% every 10 minutes. How many minutes until it is full (100%)?
  26. 26.🔋 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%?
  27. 27.🔋 A robot’s battery is at 90% and charging adds 10% every 10 minutes. How many minutes until it is full (100%)?
  28. 28.🔋 A robot runs on 3 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  29. 29.🔋 A robot runs on 2 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  30. 30.🔋 A robot’s battery holds 1500 mAh and the robot uses 500 mA. For how many hours can it run?
  31. 31.🔋 A robot’s battery is at 40% and charging adds 10% every 10 minutes. How many minutes until it is full (100%)?
  32. 32.🔋 A robot’s battery is at 80% and charging adds 20% every 10 minutes. How many minutes until it is full (100%)?
  33. 33.🔋 A robot’s battery is at 70% and charging adds 10% every 10 minutes. How many minutes until it is full (100%)?
  34. 34.🔋 A robot’s battery holds 2400 mAh and the robot uses 400 mA. For how many hours can it run?
  35. 35.🔋 A robot uses 4% of its battery every 3 minutes. How many minutes does a full battery (100%) last?
  36. 36.🔋 A robot’s battery holds 1250 mAh and the robot uses 250 mA. For how many hours can it run?
  37. 37.🔋 A robot’s battery holds 3500 mAh and the robot uses 500 mA. For how many hours can it run?
  38. 38.🔋 A robot uses 25% of its battery every 6 minutes. How many minutes does a full battery (100%) last?
  39. 39.🔋 A robot uses 2% of its battery every 5 minutes. How many minutes does a full battery (100%) last?
  40. 40.🔋 A robot’s battery holds 1000 mAh and the robot uses 200 mA. For how many hours can it run?

Answer key

  1. 90
  2. give it to an adult
  3. sunlight (solar panels)
  4. 8
  5. 1
  6. a rechargeable battery
  7. 4
  8. 1
  9. 3
  10. a power cable
  11. 150
  12. 4
  13. 5
  14. 10
  15. 3
  16. 40
  17. 20
  18. mAh
  19. 40
  20. goes back to its dock
  21. 25
  22. 3
  23. 5
  24. 16
  25. 80
  26. 2
  27. 10
  28. 4.5
  29. 3
  30. 3
  31. 60
  32. 10
  33. 30
  34. 6
  35. 75
  36. 5
  37. 7
  38. 24
  39. 250
  40. 5

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