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Robotics Worksheet: Robot Batteries

Robotics lesson 4: Power for robots · Set 103 · 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 uses 2% of its battery every 4 minutes. How many minutes does a full battery (100%) last?
  2. 2.🔋 A robot uses 10% of its battery every 3 minutes. How many minutes does a full battery (100%) last?
  3. 3.🔋 A robot’s battery holds 7000 mAh and the robot uses 1000 mA. For how many hours can it run?
  4. 4.🔋 What does a robot vacuum do when its battery is low? (a) goes back to its dock (b) turns into a car (c) explodes (d) keeps going for ever
  5. 5.🔋 A robot uses 2% of its battery every 1 minute. How many minutes does a full battery (100%) last?
  6. 6.🔋 A robot runs on 8 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  7. 7.🔋 A robot arm bolted to a factory floor usually gets its power from … (a) a wind-up key (b) a power cable (c) a coin cell (d) a solar panel
  8. 8.🔋 Battery capacity (how much it holds) is often written in … (a) kg (b) mAh (c) °C (d) km
  9. 9.🔋 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%?
  10. 10.🔋 A robot’s battery holds 1400 mAh and the robot uses 200 mA. For how many hours can it run?
  11. 11.🔋 A robot runs on 2 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  12. 12.🔋 A robot’s battery holds 5000 mAh and the robot uses 1000 mA. For how many hours can it run?
  13. 13.🔋 What powers most moving robots? (a) a tiny magnet (b) a candle (c) a water tank (d) a rechargeable battery
  14. 14.🔋 A robot’s battery is at 20% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  15. 15.🔋 A robot’s battery holds 100 mAh and the robot uses 100 mA. For how many hours can it run?
  16. 16.🔋 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%?
  17. 17.🔋 What should you do with a swollen or damaged robot battery? (a) squeeze it flat (b) throw it in a fire (c) charge it again (d) give it to an adult
  18. 18.🔋 A robot uses 5% of its battery every 4 minutes. How many minutes does a full battery (100%) last?
  19. 19.🔋 A robot runs on 3 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  20. 20.🔋 A robot’s battery is at 30% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  21. 21.🔋 A robot uses 25% of its battery every 2 minutes. How many minutes does a full battery (100%) last?
  22. 22.🔋 A robot runs on 4 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  23. 23.🔋 Many robots on far-away planets get energy from … (a) wind-up keys (b) shop batteries (c) sunlight (solar panels) (d) petrol pumps
  24. 24.🔋 A robot uses 20% of its battery every 1 minute. How many minutes does a full battery (100%) last?
  25. 25.🔋 A robot uses 25% of its battery every 3 minutes. How many minutes does a full battery (100%) last?
  26. 26.🔋 A robot’s battery is at 25% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  27. 27.🔋 A robot’s battery holds 1600 mAh and the robot uses 400 mA. For how many hours can it run?
  28. 28.🔋 A robot’s battery holds 600 mAh and the robot uses 200 mA. For how many hours can it run?
  29. 29.🔋 A robot runs on 7 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  30. 30.🔋 A robot’s battery is at 60% and charging adds 20% every 10 minutes. How many minutes until it is full (100%)?
  31. 31.🔋 A robot’s battery holds 2800 mAh and the robot uses 400 mA. For how many hours can it run?
  32. 32.🔋 A robot uses 4% of its battery every 2 minutes. How many minutes does a full battery (100%) last?
  33. 33.🔋 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%?
  34. 34.🔋 A robot uses 2% of its battery every 2 minutes. How many minutes does a full battery (100%) last?
  35. 35.🔋 A robot uses 2% of its battery every 3 minutes. How many minutes does a full battery (100%) last?
  36. 36.🔋 A robot’s battery holds 700 mAh and the robot uses 100 mA. For how many hours can it run?
  37. 37.🔋 A robot runs on 5 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  38. 38.🔋 A robot’s battery is at 80% and charging adds 20% every 10 minutes. How many minutes until it is full (100%)?
  39. 39.🔋 A robot uses 25% of its battery every 4 minutes. How many minutes does a full battery (100%) last?
  40. 40.🔋 A robot’s battery is at 45% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?

Answer key

  1. 200
  2. 30
  3. 7
  4. goes back to its dock
  5. 50
  6. 12
  7. a power cable
  8. mAh
  9. 7
  10. 7
  11. 3
  12. 5
  13. a rechargeable battery
  14. 160
  15. 1
  16. 3
  17. give it to an adult
  18. 80
  19. 4.5
  20. 140
  21. 8
  22. 6
  23. sunlight (solar panels)
  24. 5
  25. 12
  26. 150
  27. 4
  28. 3
  29. 10.5
  30. 20
  31. 7
  32. 50
  33. 10
  34. 100
  35. 150
  36. 7
  37. 7.5
  38. 10
  39. 16
  40. 110

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