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Robotics Worksheet: Robot Batteries

Robotics lesson 4: Power for robots · Set 751 · 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.🔋 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
  2. 2.🔋 A robot’s battery is at 75% and charging adds 25% every 10 minutes. How many minutes until it is full (100%)?
  3. 3.🔋 A robot’s battery is at 85%. Each lap of the track uses 5%. How many laps can it do before the battery reaches 0%?
  4. 4.🔋 What powers most moving robots? (a) a water tank (b) a candle (c) a tiny magnet (d) a rechargeable battery
  5. 5.🔋 A robot uses 2% of its battery every 6 minutes. How many minutes does a full battery (100%) last?
  6. 6.🔋 A robot’s battery holds 100 mAh and the robot uses 100 mA. For how many hours can it run?
  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 runs on 5 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  9. 9.🔋 A robot’s battery holds 2000 mAh and the robot uses 1000 mA. For how many hours can it run?
  10. 10.🔋 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%?
  11. 11.🔋 A robot’s battery holds 3200 mAh and the robot uses 400 mA. For how many hours can it run?
  12. 12.🔋 A robot uses 25% of its battery every 2 minutes. How many minutes does a full battery (100%) last?
  13. 13.🔋 Battery capacity (how much it holds) is often written in … (a) km (b) °C (c) mAh (d) kg
  14. 14.🔋 A robot uses 25% of its battery every 5 minutes. How many minutes does a full battery (100%) last?
  15. 15.🔋 A robot uses 4% of its battery every 1 minute. How many minutes does a full battery (100%) last?
  16. 16.🔋 A robot’s battery holds 1500 mAh and the robot uses 250 mA. For how many hours can it run?
  17. 17.🔋 A robot runs on 2 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  18. 18.🔋 A robot’s battery holds 1000 mAh and the robot uses 200 mA. For how many hours can it run?
  19. 19.🔋 A robot’s battery is at 10% and charging adds 10% every 10 minutes. How many minutes until it is full (100%)?
  20. 20.🔋 A robot’s battery holds 1200 mAh and the robot uses 400 mA. For how many hours can it run?
  21. 21.🔋 What does a robot vacuum do when its battery is low? (a) goes back to its dock (b) explodes (c) keeps going for ever (d) turns into a car
  22. 22.🔋 A robot uses 10% of its battery every 1 minute. How many minutes does a full battery (100%) last?
  23. 23.🔋 A robot uses 20% of its battery every 5 minutes. How many minutes does a full battery (100%) last?
  24. 24.🔋 A robot runs on 7 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  25. 25.🔋 A robot’s battery holds 500 mAh and the robot uses 500 mA. For how many hours can it run?
  26. 26.🔋 A robot’s battery holds 7000 mAh and the robot uses 1000 mA. For how many hours can it run?
  27. 27.🔋 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%?
  28. 28.🔋 A robot’s battery holds 300 mAh and the robot uses 100 mA. For how many hours can it run?
  29. 29.🔋 A robot’s battery holds 4000 mAh and the robot uses 500 mA. For how many hours can it run?
  30. 30.🔋 Many robots on far-away planets get energy from … (a) shop batteries (b) wind-up keys (c) sunlight (solar panels) (d) petrol pumps
  31. 31.🔋 A robot’s battery is at 70% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  32. 32.🔋 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
  33. 33.🔋 A robot uses 2% of its battery every 5 minutes. How many minutes does a full battery (100%) last?
  34. 34.🔋 A robot’s battery is at 95% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  35. 35.🔋 A robot’s battery is at 25% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  36. 36.🔋 A robot uses 5% of its battery every 2 minutes. How many minutes does a full battery (100%) last?
  37. 37.🔋 A robot’s battery holds 400 mAh and the robot uses 400 mA. For how many hours can it run?
  38. 38.🔋 A robot’s battery holds 800 mAh and the robot uses 400 mA. For how many hours can it run?
  39. 39.🔋 A robot’s battery holds 400 mAh and the robot uses 100 mA. For how many hours can it run?
  40. 40.🔋 A robot’s battery holds 500 mAh and the robot uses 250 mA. For how many hours can it run?

Answer key

  1. give it to an adult
  2. 10
  3. 17
  4. a rechargeable battery
  5. 300
  6. 1
  7. 30
  8. 7.5
  9. 2
  10. 14
  11. 8
  12. 8
  13. mAh
  14. 20
  15. 25
  16. 6
  17. 3
  18. 5
  19. 90
  20. 3
  21. goes back to its dock
  22. 10
  23. 25
  24. 10.5
  25. 1
  26. 7
  27. 5
  28. 3
  29. 8
  30. sunlight (solar panels)
  31. 60
  32. a power cable
  33. 250
  34. 10
  35. 150
  36. 40
  37. 1
  38. 2
  39. 4
  40. 2

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