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Robotics Worksheet: Robot Batteries

Robotics lesson 4: Power for robots · Set 518 · 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 2000 mAh and the robot uses 500 mA. For how many hours can it run?
  2. 2.🔋 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%?
  3. 3.🔋 A robot uses 10% of its battery every 2 minutes. How many minutes does a full battery (100%) last?
  4. 4.🔋 A robot’s battery is at 50% and charging adds 25% every 10 minutes. How many minutes until it is full (100%)?
  5. 5.🔋 A robot’s battery holds 3500 mAh and the robot uses 500 mA. For how many hours can it run?
  6. 6.🔋 A robot runs on 4 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  7. 7.🔋 A robot uses 10% of its battery every 5 minutes. How many minutes does a full battery (100%) last?
  8. 8.🔋 A robot’s battery holds 1500 mAh and the robot uses 250 mA. For how many hours can it run?
  9. 9.🔋 A robot uses 4% of its battery every 5 minutes. How many minutes does a full battery (100%) last?
  10. 10.🔋 A robot uses 25% of its battery every 2 minutes. How many minutes does a full battery (100%) last?
  11. 11.🔋 What should you do with a swollen or damaged robot battery? (a) charge it again (b) throw it in a fire (c) squeeze it flat (d) give it to an adult
  12. 12.🔋 A robot uses 4% of its battery every 6 minutes. How many minutes does a full battery (100%) last?
  13. 13.🔋 What powers most moving robots? (a) a tiny magnet (b) a rechargeable battery (c) a candle (d) a water tank
  14. 14.🔋 Battery capacity (how much it holds) is often written in … (a) °C (b) mAh (c) km (d) kg
  15. 15.🔋 A robot’s battery holds 400 mAh and the robot uses 200 mA. For how many hours can it run?
  16. 16.🔋 A robot’s battery is at 90% and charging adds 10% every 10 minutes. How many minutes until it is full (100%)?
  17. 17.🔋 A robot’s battery is at 70%. Each lap of the track uses 10%. How many laps can it do before the battery reaches 0%?
  18. 18.🔋 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%?
  19. 19.🔋 A robot runs on 2 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  20. 20.🔋 A robot runs on 7 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  21. 21.🔋 A robot’s battery is at 60% and charging adds 20% every 10 minutes. How many minutes until it is full (100%)?
  22. 22.🔋 A robot’s battery holds 4000 mAh and the robot uses 1000 mA. For how many hours can it run?
  23. 23.🔋 A robot’s battery is at 20% and charging adds 10% every 10 minutes. How many minutes until it is full (100%)?
  24. 24.🔋 A robot’s battery holds 200 mAh and the robot uses 100 mA. For how many hours can it run?
  25. 25.🔋 A robot’s battery holds 1750 mAh and the robot uses 250 mA. For how many hours can it run?
  26. 26.🔋 What does a robot vacuum do when its battery is low? (a) turns into a car (b) goes back to its dock (c) explodes (d) keeps going for ever
  27. 27.🔋 A robot’s battery holds 1000 mAh and the robot uses 500 mA. For how many hours can it run?
  28. 28.🔋 A robot’s battery holds 2500 mAh and the robot uses 500 mA. For how many hours can it run?
  29. 29.🔋 Many robots on far-away planets get energy from … (a) sunlight (solar panels) (b) petrol pumps (c) shop batteries (d) wind-up keys
  30. 30.🔋 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%?
  31. 31.🔋 A robot uses 2% of its battery every 3 minutes. How many minutes does a full battery (100%) last?
  32. 32.🔋 A robot’s battery holds 1600 mAh and the robot uses 200 mA. For how many hours can it run?
  33. 33.🔋 A robot’s battery is at 0% and charging adds 20% every 10 minutes. How many minutes until it is full (100%)?
  34. 34.🔋 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%?
  35. 35.🔋 A robot runs on 5 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  36. 36.🔋 A robot runs on 6 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  37. 37.🔋 A robot’s battery is at 60%. Each lap of the track uses 10%. How many laps can it do before the battery reaches 0%?
  38. 38.🔋 A robot’s battery is at 0% and charging adds 25% every 10 minutes. How many minutes until it is full (100%)?
  39. 39.🔋 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%?
  40. 40.🔋 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

Answer key

  1. 4
  2. 3
  3. 20
  4. 20
  5. 7
  6. 6
  7. 50
  8. 6
  9. 125
  10. 8
  11. give it to an adult
  12. 150
  13. a rechargeable battery
  14. mAh
  15. 2
  16. 10
  17. 7
  18. 5
  19. 3
  20. 10.5
  21. 20
  22. 4
  23. 80
  24. 2
  25. 7
  26. goes back to its dock
  27. 2
  28. 5
  29. sunlight (solar panels)
  30. 15
  31. 150
  32. 8
  33. 50
  34. 14
  35. 7.5
  36. 9
  37. 6
  38. 40
  39. 4
  40. a power cable

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