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Robotics Worksheet: Robot Batteries

Robotics lesson 4: Power for robots · Set 88 · 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 runs on 4 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  2. 2.🔋 A robot uses 5% of its battery every 3 minutes. How many minutes does a full battery (100%) last?
  3. 3.🔋 What powers most moving robots? (a) a rechargeable battery (b) a tiny magnet (c) a candle (d) a water tank
  4. 4.🔋 Battery capacity (how much it holds) is often written in … (a) °C (b) km (c) kg (d) mAh
  5. 5.🔋 A robot’s battery holds 400 mAh and the robot uses 200 mA. For how many hours can it run?
  6. 6.🔋 A robot runs on 5 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  7. 7.🔋 A robot runs on 3 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  8. 8.🔋 What should you do with a swollen or damaged robot battery? (a) charge it again (b) squeeze it flat (c) throw it in a fire (d) give it to an adult
  9. 9.🔋 A robot’s battery holds 600 mAh and the robot uses 100 mA. For how many hours can it run?
  10. 10.🔋 A robot runs on 7 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  11. 11.🔋 A robot’s battery is at 60% and charging adds 10% every 10 minutes. How many minutes until it is full (100%)?
  12. 12.🔋 A robot’s battery is at 35% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  13. 13.🔋 A robot uses 5% of its battery every 5 minutes. How many minutes does a full battery (100%) last?
  14. 14.🔋 A robot’s battery is at 60% and charging adds 20% every 10 minutes. How many minutes until it is full (100%)?
  15. 15.🔋 A robot’s battery is at 0% and charging adds 20% every 10 minutes. How many minutes until it is full (100%)?
  16. 16.🔋 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%?
  17. 17.🔋 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%?
  18. 18.🔋 A robot uses 25% of its battery every 6 minutes. How many minutes does a full battery (100%) last?
  19. 19.🔋 A robot uses 5% of its battery every 2 minutes. How many minutes does a full battery (100%) last?
  20. 20.🔋 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
  21. 21.🔋 A robot uses 20% of its battery every 3 minutes. How many minutes does a full battery (100%) last?
  22. 22.🔋 A robot’s battery is at 60% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  23. 23.🔋 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%?
  24. 24.🔋 A robot’s battery holds 2800 mAh and the robot uses 400 mA. For how many hours can it run?
  25. 25.🔋 A robot’s battery is at 50%. Each lap of the track uses 10%. How many laps can it do before the battery reaches 0%?
  26. 26.🔋 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
  27. 27.🔋 A robot’s battery is at 80% and charging adds 10% every 10 minutes. How many minutes until it is full (100%)?
  28. 28.🔋 A robot’s battery holds 1400 mAh and the robot uses 200 mA. For how many hours can it run?
  29. 29.🔋 A robot’s battery holds 5000 mAh and the robot uses 1000 mA. For how many hours can it run?
  30. 30.🔋 A robot’s battery holds 500 mAh and the robot uses 500 mA. For how many hours can it run?
  31. 31.🔋 A robot’s battery is at 75% and charging adds 25% every 10 minutes. How many minutes until it is full (100%)?
  32. 32.🔋 A robot’s battery holds 3000 mAh and the robot uses 1000 mA. For how many hours can it run?
  33. 33.🔋 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%?
  34. 34.🔋 A robot uses 2% of its battery every 6 minutes. How many minutes does a full battery (100%) last?
  35. 35.🔋 A robot uses 20% of its battery every 5 minutes. How many minutes does a full battery (100%) last?
  36. 36.🔋 A robot uses 2% of its battery every 3 minutes. How many minutes does a full battery (100%) last?
  37. 37.🔋 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%?
  38. 38.🔋 A robot uses 25% of its battery every 3 minutes. How many minutes does a full battery (100%) last?
  39. 39.🔋 A robot uses 4% of its battery every 2 minutes. How many minutes does a full battery (100%) last?
  40. 40.🔋 A robot’s battery holds 1000 mAh and the robot uses 250 mA. For how many hours can it run?

Answer key

  1. 6
  2. 60
  3. a rechargeable battery
  4. mAh
  5. 2
  6. 7.5
  7. 4.5
  8. give it to an adult
  9. 6
  10. 10.5
  11. 40
  12. 130
  13. 100
  14. 20
  15. 50
  16. 4
  17. 3
  18. 24
  19. 40
  20. goes back to its dock
  21. 15
  22. 80
  23. 2
  24. 7
  25. 5
  26. a power cable
  27. 20
  28. 7
  29. 5
  30. 1
  31. 10
  32. 3
  33. 2
  34. 300
  35. 25
  36. 150
  37. 3
  38. 12
  39. 50
  40. 4

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