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Robotics Worksheet: Robot Batteries

Robotics lesson 4: Power for robots · Set 44 · 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 8 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  2. 2.🔋 A robot’s battery holds 3000 mAh and the robot uses 500 mA. For how many hours can it run?
  3. 3.🔋 A robot arm bolted to a factory floor usually gets its power from … (a) a coin cell (b) a wind-up key (c) a power cable (d) a solar panel
  4. 4.🔋 A robot uses 5% of its battery every 4 minutes. How many minutes does a full battery (100%) last?
  5. 5.🔋 A robot’s battery holds 5000 mAh and the robot uses 1000 mA. For how many hours can it run?
  6. 6.🔋 A robot’s battery is at 0% and charging adds 20% every 10 minutes. How many minutes until it is full (100%)?
  7. 7.🔋 A robot’s battery is at 95%. Each lap of the track uses 5%. How many laps can it do before the battery reaches 0%?
  8. 8.🔋 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
  9. 9.🔋 Many robots on far-away planets get energy from … (a) petrol pumps (b) wind-up keys (c) shop batteries (d) sunlight (solar panels)
  10. 10.🔋 A robot’s battery holds 300 mAh and the robot uses 100 mA. For how many hours can it run?
  11. 11.🔋 A robot’s battery holds 1500 mAh and the robot uses 250 mA. For how many hours can it run?
  12. 12.🔋 Battery capacity (how much it holds) is often written in … (a) km (b) kg (c) mAh (d) °C
  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.🔋 What powers most moving robots? (a) a rechargeable battery (b) a water tank (c) a candle (d) a tiny magnet
  15. 15.🔋 A robot runs on 7 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  16. 16.🔋 A robot’s battery is at 60% and charging adds 20% every 10 minutes. How many minutes until it is full (100%)?
  17. 17.🔋 A robot uses 10% of its battery every 5 minutes. How many minutes does a full battery (100%) last?
  18. 18.🔋 A robot uses 20% of its battery every 6 minutes. How many minutes does a full battery (100%) last?
  19. 19.🔋 A robot’s battery is at 65%. Each lap of the track uses 5%. How many laps can it do before the battery reaches 0%?
  20. 20.🔋 A robot uses 2% of its battery every 4 minutes. How many minutes does a full battery (100%) last?
  21. 21.🔋 A robot runs on 3 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  22. 22.🔋 A robot’s battery is at 20% and charging adds 10% every 10 minutes. How many minutes until it is full (100%)?
  23. 23.🔋 A robot’s battery holds 3200 mAh and the robot uses 400 mA. For how many hours can it run?
  24. 24.🔋 A robot’s battery holds 600 mAh and the robot uses 200 mA. For how many hours can it run?
  25. 25.🔋 A robot’s battery is at 40% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  26. 26.🔋 A robot’s battery holds 8000 mAh and the robot uses 1000 mA. For how many hours can it run?
  27. 27.🔋 A robot’s battery is at 40%. Each lap of the track uses 20%. How many laps can it do before the battery reaches 0%?
  28. 28.🔋 A robot runs on 6 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  29. 29.🔋 A robot uses 10% of its battery every 4 minutes. How many minutes does a full battery (100%) last?
  30. 30.🔋 A robot runs on 2 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  31. 31.🔋 A robot’s battery is at 60%. Each lap of the track uses 20%. How many laps can it do before the battery reaches 0%?
  32. 32.🔋 A robot uses 4% of its battery every 1 minute. How many minutes does a full battery (100%) last?
  33. 33.🔋 A robot uses 4% of its battery every 3 minutes. How many minutes does a full battery (100%) last?
  34. 34.🔋 A robot’s battery holds 800 mAh and the robot uses 200 mA. For how many hours can it run?
  35. 35.🔋 A robot’s battery is at 90% and charging adds 10% every 10 minutes. How many minutes until it is full (100%)?
  36. 36.🔋 A robot uses 10% of its battery every 1 minute. How many minutes does a full battery (100%) last?
  37. 37.🔋 A robot’s battery is at 20% and charging adds 20% every 10 minutes. How many minutes until it is full (100%)?
  38. 38.🔋 A robot’s battery is at 70% and charging adds 10% every 10 minutes. How many minutes until it is full (100%)?
  39. 39.🔋 A robot runs on 5 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  40. 40.🔋 A robot uses 25% of its battery every 1 minute. How many minutes does a full battery (100%) last?

Answer key

  1. 12
  2. 6
  3. a power cable
  4. 80
  5. 5
  6. 50
  7. 19
  8. goes back to its dock
  9. sunlight (solar panels)
  10. 3
  11. 6
  12. mAh
  13. 5
  14. a rechargeable battery
  15. 10.5
  16. 20
  17. 50
  18. 30
  19. 13
  20. 200
  21. 4.5
  22. 80
  23. 8
  24. 3
  25. 120
  26. 8
  27. 2
  28. 9
  29. 40
  30. 3
  31. 3
  32. 25
  33. 75
  34. 4
  35. 10
  36. 10
  37. 40
  38. 30
  39. 7.5
  40. 4

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