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Robotics Worksheet: Robot Batteries

Robotics lesson 4: Power for robots · Set 407 · 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 800 mAh and the robot uses 400 mA. For how many hours can it run?
  2. 2.🔋 What should you do with a swollen or damaged robot battery? (a) throw it in a fire (b) charge it again (c) give it to an adult (d) squeeze it flat
  3. 3.🔋 A robot’s battery holds 3200 mAh and the robot uses 400 mA. For how many hours can it run?
  4. 4.🔋 A robot’s battery holds 2500 mAh and the robot uses 500 mA. For how many hours can it run?
  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 80% and charging adds 20% every 10 minutes. How many minutes until it is full (100%)?
  7. 7.🔋 A robot uses 2% of its battery every 1 minute. How many minutes does a full battery (100%) last?
  8. 8.🔋 A robot runs on 7 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  9. 9.🔋 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%?
  10. 10.🔋 Battery capacity (how much it holds) is often written in … (a) °C (b) kg (c) mAh (d) km
  11. 11.🔋 A robot arm bolted to a factory floor usually gets its power from … (a) a solar panel (b) a power cable (c) a coin cell (d) a wind-up key
  12. 12.🔋 A robot uses 5% of its battery every 5 minutes. How many minutes does a full battery (100%) last?
  13. 13.🔋 Many robots on far-away planets get energy from … (a) petrol pumps (b) shop batteries (c) sunlight (solar panels) (d) wind-up keys
  14. 14.🔋 A robot’s battery is at 10% and charging adds 10% every 10 minutes. How many minutes until it is full (100%)?
  15. 15.🔋 A robot’s battery is at 0% and charging adds 25% every 10 minutes. How many minutes until it is full (100%)?
  16. 16.🔋 A robot’s battery holds 250 mAh and the robot uses 250 mA. For how many hours can it run?
  17. 17.🔋 A robot uses 20% of its battery every 3 minutes. How many minutes does a full battery (100%) last?
  18. 18.🔋 What does a robot vacuum do when its battery is low? (a) explodes (b) keeps going for ever (c) turns into a car (d) goes back to its dock
  19. 19.🔋 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%?
  20. 20.🔋 A robot’s battery is at 20%. Each lap of the track uses 5%. How many laps can it do before the battery reaches 0%?
  21. 21.🔋 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%?
  22. 22.🔋 A robot’s battery holds 2400 mAh and the robot uses 400 mA. For how many hours can it run?
  23. 23.🔋 A robot uses 10% of its battery every 2 minutes. How many minutes does a full battery (100%) last?
  24. 24.🔋 A robot’s battery holds 400 mAh and the robot uses 100 mA. For how many hours can it run?
  25. 25.🔋 A robot’s battery is at 40% and charging adds 10% every 10 minutes. How many minutes until it is full (100%)?
  26. 26.🔋 A robot’s battery is at 40% and charging adds 20% every 10 minutes. How many minutes until it is full (100%)?
  27. 27.🔋 A robot’s battery holds 400 mAh and the robot uses 200 mA. For how many hours can it run?
  28. 28.🔋 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%?
  29. 29.🔋 A robot’s battery is at 25% and charging adds 25% every 10 minutes. How many minutes until it is full (100%)?
  30. 30.🔋 A robot’s battery holds 500 mAh and the robot uses 250 mA. For how many hours can it run?
  31. 31.🔋 A robot uses 2% of its battery every 4 minutes. How many minutes does a full battery (100%) last?
  32. 32.🔋 A robot runs on 5 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  33. 33.🔋 What powers most moving robots? (a) a candle (b) a rechargeable battery (c) a water tank (d) a tiny magnet
  34. 34.🔋 A robot runs on 6 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  35. 35.🔋 A robot uses 25% of its battery every 3 minutes. How many minutes does a full battery (100%) last?
  36. 36.🔋 A robot runs on 3 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  37. 37.🔋 A robot’s battery holds 1600 mAh and the robot uses 400 mA. For how many hours can it run?
  38. 38.🔋 A robot’s battery holds 3000 mAh and the robot uses 1000 mA. For how many hours can it run?
  39. 39.🔋 A robot’s battery holds 8000 mAh and the robot uses 1000 mA. For how many hours can it run?
  40. 40.🔋 A robot’s battery is at 90% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?

Answer key

  1. 2
  2. give it to an adult
  3. 8
  4. 5
  5. 1
  6. 10
  7. 50
  8. 10.5
  9. 2
  10. mAh
  11. a power cable
  12. 100
  13. sunlight (solar panels)
  14. 90
  15. 40
  16. 1
  17. 15
  18. goes back to its dock
  19. 5
  20. 4
  21. 3
  22. 6
  23. 20
  24. 4
  25. 60
  26. 30
  27. 2
  28. 2
  29. 30
  30. 2
  31. 200
  32. 7.5
  33. a rechargeable battery
  34. 9
  35. 12
  36. 4.5
  37. 4
  38. 3
  39. 8
  40. 20

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