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Robotics Worksheet: Robot Batteries

Robotics lesson 4: Power for robots · Set 206 · 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 1200 mAh and the robot uses 200 mA. For how many hours can it run?
  2. 2.🔋 A robot’s battery holds 1400 mAh and the robot uses 200 mA. For how many hours can it run?
  3. 3.🔋 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%?
  4. 4.🔋 A robot runs on 7 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  5. 5.🔋 A robot uses 25% of its battery every 2 minutes. How many minutes does a full battery (100%) last?
  6. 6.🔋 A robot uses 25% of its battery every 5 minutes. How many minutes does a full battery (100%) last?
  7. 7.🔋 A robot’s battery holds 1000 mAh and the robot uses 500 mA. For how many hours can it run?
  8. 8.🔋 A robot’s battery is at 50% and charging adds 10% every 10 minutes. How many minutes until it is full (100%)?
  9. 9.🔋 What does a robot vacuum do when its battery is low? (a) keeps going for ever (b) turns into a car (c) goes back to its dock (d) explodes
  10. 10.🔋 A robot runs on 8 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  11. 11.🔋 A robot arm bolted to a factory floor usually gets its power from … (a) a solar panel (b) a wind-up key (c) a power cable (d) a coin cell
  12. 12.🔋 A robot’s battery holds 750 mAh and the robot uses 250 mA. For how many hours can it run?
  13. 13.🔋 A robot uses 5% of its battery every 4 minutes. How many minutes does a full battery (100%) last?
  14. 14.🔋 A robot’s battery holds 2000 mAh and the robot uses 500 mA. For how many hours can it run?
  15. 15.🔋 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%?
  16. 16.🔋 A robot’s battery holds 400 mAh and the robot uses 400 mA. For how many hours can it run?
  17. 17.🔋 A robot runs on 2 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  18. 18.🔋 What should you do with a swollen or damaged robot battery? (a) charge it again (b) give it to an adult (c) squeeze it flat (d) throw it in a fire
  19. 19.🔋 Battery capacity (how much it holds) is often written in … (a) mAh (b) °C (c) km (d) kg
  20. 20.🔋 A robot uses 20% of its battery every 2 minutes. How many minutes does a full battery (100%) last?
  21. 21.🔋 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%?
  22. 22.🔋 A robot uses 20% of its battery every 4 minutes. How many minutes does a full battery (100%) last?
  23. 23.🔋 A robot uses 2% of its battery every 1 minute. How many minutes does a full battery (100%) last?
  24. 24.🔋 A robot’s battery is at 20% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  25. 25.🔋 A robot’s battery holds 1000 mAh and the robot uses 200 mA. For how many hours can it run?
  26. 26.🔋 A robot uses 5% of its battery every 6 minutes. How many minutes does a full battery (100%) last?
  27. 27.🔋 A robot uses 20% of its battery every 5 minutes. How many minutes does a full battery (100%) last?
  28. 28.🔋 A robot’s battery holds 3500 mAh and the robot uses 500 mA. For how many hours can it run?
  29. 29.🔋 A robot’s battery is at 80% and charging adds 20% every 10 minutes. How many minutes until it is full (100%)?
  30. 30.🔋 A robot runs on 5 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  31. 31.🔋 What powers most moving robots? (a) a tiny magnet (b) a rechargeable battery (c) a water tank (d) a candle
  32. 32.🔋 A robot uses 20% of its battery every 3 minutes. How many minutes does a full battery (100%) last?
  33. 33.🔋 A robot’s battery holds 2500 mAh and the robot uses 500 mA. For how many hours can it run?
  34. 34.🔋 A robot’s battery is at 0% and charging adds 25% every 10 minutes. How many minutes until it is full (100%)?
  35. 35.🔋 A robot’s battery holds 800 mAh and the robot uses 400 mA. For how many hours can it run?
  36. 36.🔋 A robot uses 4% of its battery every 3 minutes. How many minutes does a full battery (100%) last?
  37. 37.🔋 A robot’s battery holds 300 mAh and the robot uses 100 mA. For how many hours can it run?
  38. 38.🔋 A robot’s battery holds 200 mAh and the robot uses 100 mA. For how many hours can it run?
  39. 39.🔋 A robot’s battery holds 400 mAh and the robot uses 200 mA. For how many hours can it run?
  40. 40.🔋 A robot’s battery is at 40% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?

Answer key

  1. 6
  2. 7
  3. 14
  4. 10.5
  5. 8
  6. 20
  7. 2
  8. 50
  9. goes back to its dock
  10. 12
  11. a power cable
  12. 3
  13. 80
  14. 4
  15. 6
  16. 1
  17. 3
  18. give it to an adult
  19. mAh
  20. 10
  21. 2
  22. 20
  23. 50
  24. 160
  25. 5
  26. 120
  27. 25
  28. 7
  29. 10
  30. 7.5
  31. a rechargeable battery
  32. 15
  33. 5
  34. 40
  35. 2
  36. 75
  37. 3
  38. 2
  39. 2
  40. 120

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