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Robotics Worksheet: Robot Batteries

Robotics lesson 4: Power for robots · Set 125 · 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 2000 mAh and the robot uses 500 mA. For how many hours can it run?
  2. 2.🔋 A robot uses 20% of its battery every 6 minutes. How many minutes does a full battery (100%) last?
  3. 3.🔋 A robot uses 10% of its battery every 2 minutes. How many minutes does a full battery (100%) last?
  4. 4.🔋 A robot runs on 6 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  5. 5.🔋 A robot’s battery holds 1500 mAh and the robot uses 250 mA. For how many hours can it run?
  6. 6.🔋 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%?
  7. 7.🔋 A robot’s battery is at 80% and charging adds 10% every 10 minutes. How many minutes until it is full (100%)?
  8. 8.🔋 A robot uses 10% of its battery every 5 minutes. How many minutes does a full battery (100%) last?
  9. 9.🔋 A robot’s battery is at 80%. Each lap of the track uses 5%. How many laps can it do before the battery reaches 0%?
  10. 10.🔋 A robot uses 4% of its battery every 6 minutes. How many minutes does a full battery (100%) last?
  11. 11.🔋 A robot’s battery is at 20% and charging adds 20% every 10 minutes. How many minutes until it is full (100%)?
  12. 12.🔋 Battery capacity (how much it holds) is often written in … (a) °C (b) km (c) mAh (d) kg
  13. 13.🔋 A robot uses 25% of its battery every 2 minutes. How many minutes does a full battery (100%) last?
  14. 14.🔋 A robot’s battery is at 60% and charging adds 20% every 10 minutes. How many minutes until it is full (100%)?
  15. 15.🔋 Many robots on far-away planets get energy from … (a) shop batteries (b) sunlight (solar panels) (c) wind-up keys (d) petrol pumps
  16. 16.🔋 A robot’s battery is at 70% and charging adds 10% every 10 minutes. How many minutes until it is full (100%)?
  17. 17.🔋 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
  18. 18.🔋 What should you do with a swollen or damaged robot battery? (a) give it to an adult (b) throw it in a fire (c) squeeze it flat (d) charge it again
  19. 19.🔋 A robot uses 25% of its battery every 6 minutes. How many minutes does a full battery (100%) last?
  20. 20.🔋 A robot’s battery is at 0% and charging adds 25% every 10 minutes. How many minutes until it is full (100%)?
  21. 21.🔋 A robot’s battery holds 2800 mAh and the robot uses 400 mA. For how many hours can it run?
  22. 22.🔋 A robot runs on 8 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  23. 23.🔋 A robot’s battery is at 75%. Each lap of the track uses 25%. How many laps can it do before the battery reaches 0%?
  24. 24.🔋 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%?
  25. 25.🔋 A robot runs on 5 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  26. 26.🔋 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%?
  27. 27.🔋 A robot’s battery is at 15% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  28. 28.🔋 A robot’s battery holds 7000 mAh and the robot uses 1000 mA. For how many hours can it run?
  29. 29.🔋 What powers most moving robots? (a) a candle (b) a water tank (c) a rechargeable battery (d) a tiny magnet
  30. 30.🔋 A robot uses 10% of its battery every 1 minute. How many minutes does a full battery (100%) last?
  31. 31.🔋 A robot’s battery is at 50% and charging adds 25% every 10 minutes. How many minutes until it is full (100%)?
  32. 32.🔋 What does a robot vacuum do when its battery is low? (a) goes back to its dock (b) keeps going for ever (c) turns into a car (d) explodes
  33. 33.🔋 A robot’s battery holds 8000 mAh and the robot uses 1000 mA. For how many hours can it run?
  34. 34.🔋 A robot’s battery holds 1000 mAh and the robot uses 500 mA. For how many hours can it run?
  35. 35.🔋 A robot runs on 7 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  36. 36.🔋 A robot’s battery holds 750 mAh and the robot uses 250 mA. For how many hours can it run?
  37. 37.🔋 A robot’s battery is at 20% and charging adds 10% every 10 minutes. How many minutes until it is full (100%)?
  38. 38.🔋 A robot uses 25% of its battery every 4 minutes. How many minutes does a full battery (100%) last?
  39. 39.🔋 A robot runs on 4 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  40. 40.🔋 A robot’s battery holds 1400 mAh and the robot uses 200 mA. For how many hours can it run?

Answer key

  1. 4
  2. 30
  3. 20
  4. 9
  5. 6
  6. 7
  7. 20
  8. 50
  9. 16
  10. 150
  11. 40
  12. mAh
  13. 8
  14. 20
  15. sunlight (solar panels)
  16. 30
  17. a power cable
  18. give it to an adult
  19. 24
  20. 40
  21. 7
  22. 12
  23. 3
  24. 3
  25. 7.5
  26. 5
  27. 170
  28. 7
  29. a rechargeable battery
  30. 10
  31. 20
  32. goes back to its dock
  33. 8
  34. 2
  35. 10.5
  36. 3
  37. 80
  38. 16
  39. 6
  40. 7

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