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Robotics Worksheet: Robot Batteries

Robotics lesson 4: Power for robots · Set 298 · 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 3 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  2. 2.🔋 Battery capacity (how much it holds) is often written in … (a) kg (b) °C (c) mAh (d) km
  3. 3.🔋 A robot’s battery holds 500 mAh and the robot uses 100 mA. For how many hours can it run?
  4. 4.🔋 What does a robot vacuum do when its battery is low? (a) explodes (b) turns into a car (c) keeps going for ever (d) goes back to its dock
  5. 5.🔋 A robot’s battery holds 800 mAh and the robot uses 200 mA. For how many hours can it run?
  6. 6.🔋 A robot arm bolted to a factory floor usually gets its power from … (a) a power cable (b) a wind-up key (c) a solar panel (d) a coin cell
  7. 7.🔋 A robot’s battery is at 40% and charging adds 20% every 10 minutes. How many minutes until it is full (100%)?
  8. 8.🔋 A robot’s battery holds 3000 mAh and the robot uses 500 mA. For how many hours can it run?
  9. 9.🔋 A robot’s battery is at 25%. Each lap of the track uses 5%. How many laps can it do before the battery reaches 0%?
  10. 10.🔋 A robot’s battery is at 90%. Each lap of the track uses 10%. How many laps can it do before the battery reaches 0%?
  11. 11.🔋 A robot runs on 7 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  12. 12.🔋 A robot’s battery holds 2000 mAh and the robot uses 1000 mA. For how many hours can it run?
  13. 13.🔋 A robot’s battery is at 60% and charging adds 20% every 10 minutes. How many minutes until it is full (100%)?
  14. 14.🔋 A robot’s battery holds 1000 mAh and the robot uses 500 mA. For how many hours can it run?
  15. 15.🔋 A robot runs on 8 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  16. 16.🔋 A robot uses 5% of its battery every 3 minutes. How many minutes does a full battery (100%) last?
  17. 17.🔋 Many robots on far-away planets get energy from … (a) shop batteries (b) sunlight (solar panels) (c) petrol pumps (d) wind-up keys
  18. 18.🔋 A robot’s battery is at 70% and charging adds 10% every 10 minutes. How many minutes until it is full (100%)?
  19. 19.🔋 What should you do with a swollen or damaged robot battery? (a) throw it in a fire (b) squeeze it flat (c) charge it again (d) give it to an adult
  20. 20.🔋 A robot’s battery is at 25% and charging adds 25% every 10 minutes. How many minutes until it is full (100%)?
  21. 21.🔋 A robot uses 2% of its battery every 2 minutes. How many minutes does a full battery (100%) last?
  22. 22.🔋 What powers most moving robots? (a) a tiny magnet (b) a water tank (c) a rechargeable battery (d) a candle
  23. 23.🔋 A robot’s battery is at 55% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  24. 24.🔋 A robot’s battery is at 75% and charging adds 25% every 10 minutes. How many minutes until it is full (100%)?
  25. 25.🔋 A robot’s battery holds 1750 mAh and the robot uses 250 mA. For how many hours can it run?
  26. 26.🔋 A robot’s battery is at 50% and charging adds 25% every 10 minutes. How many minutes until it is full (100%)?
  27. 27.🔋 A robot’s battery is at 80% and charging adds 20% every 10 minutes. How many minutes until it is full (100%)?
  28. 28.🔋 A robot runs on 2 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  29. 29.🔋 A robot’s battery holds 1250 mAh and the robot uses 250 mA. For how many hours can it run?
  30. 30.🔋 A robot uses 2% of its battery every 5 minutes. How many minutes does a full battery (100%) last?
  31. 31.🔋 A robot uses 25% of its battery every 5 minutes. How many minutes does a full battery (100%) last?
  32. 32.🔋 A robot uses 20% of its battery every 1 minute. How many minutes does a full battery (100%) last?
  33. 33.🔋 A robot uses 20% of its battery every 6 minutes. How many minutes does a full battery (100%) last?
  34. 34.🔋 A robot’s battery is at 90% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  35. 35.🔋 A robot’s battery holds 3500 mAh and the robot uses 500 mA. For how many hours can it run?
  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 0% and charging adds 25% every 10 minutes. How many minutes until it is full (100%)?
  38. 38.🔋 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%?
  39. 39.🔋 A robot’s battery holds 700 mAh and the robot uses 100 mA. For how many hours can it run?
  40. 40.🔋 A robot’s battery holds 750 mAh and the robot uses 250 mA. For how many hours can it run?

Answer key

  1. 4.5
  2. mAh
  3. 5
  4. goes back to its dock
  5. 4
  6. a power cable
  7. 30
  8. 6
  9. 5
  10. 9
  11. 10.5
  12. 2
  13. 20
  14. 2
  15. 12
  16. 60
  17. sunlight (solar panels)
  18. 30
  19. give it to an adult
  20. 30
  21. 100
  22. a rechargeable battery
  23. 90
  24. 10
  25. 7
  26. 20
  27. 10
  28. 3
  29. 5
  30. 250
  31. 20
  32. 5
  33. 30
  34. 20
  35. 7
  36. 60
  37. 40
  38. 3
  39. 7
  40. 3

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