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Robotics Worksheet: Robot Batteries

Robotics lesson 4: Power for robots · Set 64 · 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 1250 mAh and the robot uses 250 mA. For how many hours can it run?
  2. 2.🔋 A robot’s battery is at 25% and charging adds 25% every 10 minutes. How many minutes until it is full (100%)?
  3. 3.🔋 A robot uses 25% of its battery every 6 minutes. How many minutes does a full battery (100%) last?
  4. 4.🔋 A robot’s battery is at 45% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  5. 5.🔋 A robot’s battery holds 200 mAh and the robot uses 200 mA. For how many hours can it run?
  6. 6.🔋 A robot’s battery is at 20% and charging adds 10% every 10 minutes. How many minutes until it is full (100%)?
  7. 7.🔋 A robot uses 10% of its battery every 2 minutes. How many minutes does a full battery (100%) last?
  8. 8.🔋 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
  9. 9.🔋 A robot’s battery holds 700 mAh and the robot uses 100 mA. For how many hours can it run?
  10. 10.🔋 A robot’s battery is at 50%. Each lap of the track uses 5%. How many laps can it do before the battery reaches 0%?
  11. 11.🔋 Many robots on far-away planets get energy from … (a) petrol pumps (b) wind-up keys (c) sunlight (solar panels) (d) shop batteries
  12. 12.🔋 A robot’s battery holds 4000 mAh and the robot uses 500 mA. For how many hours can it run?
  13. 13.🔋 A robot uses 5% of its battery every 1 minute. How many minutes does a full battery (100%) last?
  14. 14.🔋 What should you do with a swollen or damaged robot battery? (a) squeeze it flat (b) throw it in a fire (c) give it to an adult (d) charge it again
  15. 15.🔋 A robot’s battery holds 200 mAh and the robot uses 100 mA. For how many hours can it run?
  16. 16.🔋 A robot runs on 6 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  17. 17.🔋 What does a robot vacuum do when its battery is low? (a) goes back to its dock (b) explodes (c) turns into a car (d) keeps going for ever
  18. 18.🔋 A robot uses 4% of its battery every 6 minutes. How many minutes does a full battery (100%) last?
  19. 19.🔋 What powers most moving robots? (a) a rechargeable battery (b) a candle (c) a tiny magnet (d) a water tank
  20. 20.🔋 A robot uses 25% of its battery every 5 minutes. How many minutes does a full battery (100%) last?
  21. 21.🔋 A robot’s battery is at 60% and charging adds 10% every 10 minutes. How many minutes until it is full (100%)?
  22. 22.🔋 A robot uses 4% of its battery every 5 minutes. How many minutes does a full battery (100%) last?
  23. 23.🔋 A robot’s battery is at 0% and charging adds 25% every 10 minutes. How many minutes until it is full (100%)?
  24. 24.🔋 A robot’s battery is at 35%. Each lap of the track uses 5%. How many laps can it do before the battery reaches 0%?
  25. 25.🔋 Battery capacity (how much it holds) is often written in … (a) km (b) mAh (c) °C (d) kg
  26. 26.🔋 A robot runs on 5 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  27. 27.🔋 A robot uses 20% of its battery every 2 minutes. How many minutes does a full battery (100%) last?
  28. 28.🔋 A robot uses 10% of its battery every 6 minutes. How many minutes does a full battery (100%) last?
  29. 29.🔋 A robot’s battery is at 30% and charging adds 10% every 10 minutes. How many minutes until it is full (100%)?
  30. 30.🔋 A robot runs on 3 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  31. 31.🔋 A robot uses 2% of its battery every 1 minute. How many minutes does a full battery (100%) last?
  32. 32.🔋 A robot uses 10% of its battery every 5 minutes. How many minutes does a full battery (100%) last?
  33. 33.🔋 A robot’s battery holds 2000 mAh and the robot uses 500 mA. For how many hours can it run?
  34. 34.🔋 A robot’s battery is at 90% and charging adds 10% every 10 minutes. How many minutes until it is full (100%)?
  35. 35.🔋 A robot runs on 2 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  36. 36.🔋 A robot’s battery is at 40% and charging adds 10% every 10 minutes. How many minutes until it is full (100%)?
  37. 37.🔋 A robot’s battery is at 70% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  38. 38.🔋 A robot’s battery is at 0% and charging adds 20% every 10 minutes. How many minutes until it is full (100%)?
  39. 39.🔋 A robot uses 5% of its battery every 6 minutes. How many minutes does a full battery (100%) last?
  40. 40.🔋 A robot uses 10% of its battery every 4 minutes. How many minutes does a full battery (100%) last?

Answer key

  1. 5
  2. 30
  3. 24
  4. 110
  5. 1
  6. 80
  7. 20
  8. a power cable
  9. 7
  10. 10
  11. sunlight (solar panels)
  12. 8
  13. 20
  14. give it to an adult
  15. 2
  16. 9
  17. goes back to its dock
  18. 150
  19. a rechargeable battery
  20. 20
  21. 40
  22. 125
  23. 40
  24. 7
  25. mAh
  26. 7.5
  27. 10
  28. 60
  29. 70
  30. 4.5
  31. 50
  32. 50
  33. 4
  34. 10
  35. 3
  36. 60
  37. 60
  38. 50
  39. 120
  40. 40

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