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Robotics Worksheet: Robot Batteries

Robotics lesson 4: Power for robots · Set 8 · 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 is at 60%. Each lap of the track uses 20%. How many laps can it do before the battery reaches 0%?
  2. 2.🔋 A robot’s battery holds 800 mAh and the robot uses 400 mA. For how many hours can it run?
  3. 3.🔋 A robot’s battery holds 300 mAh and the robot uses 100 mA. For how many hours can it run?
  4. 4.🔋 A robot’s battery is at 95% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  5. 5.🔋 What powers most moving robots? (a) a candle (b) a rechargeable battery (c) a water tank (d) a tiny magnet
  6. 6.🔋 Many robots on far-away planets get energy from … (a) sunlight (solar panels) (b) shop batteries (c) wind-up keys (d) petrol pumps
  7. 7.🔋 Battery capacity (how much it holds) is often written in … (a) km (b) kg (c) mAh (d) °C
  8. 8.🔋 A robot’s battery holds 3200 mAh and the robot uses 400 mA. For how many hours can it run?
  9. 9.🔋 A robot’s battery is at 30%. Each lap of the track uses 10%. How many laps can it do before the battery reaches 0%?
  10. 10.🔋 A robot’s battery holds 750 mAh and the robot uses 250 mA. For how many hours can it run?
  11. 11.🔋 A robot’s battery is at 50% and charging adds 25% every 10 minutes. How many minutes until it is full (100%)?
  12. 12.🔋 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
  13. 13.🔋 A robot’s battery is at 25% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  14. 14.🔋 A robot uses 5% of its battery every 3 minutes. How many minutes does a full battery (100%) last?
  15. 15.🔋 A robot runs on 7 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  16. 16.🔋 A robot’s battery holds 2500 mAh and the robot uses 500 mA. For how many hours can it run?
  17. 17.🔋 A robot runs on 6 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  18. 18.🔋 A robot runs on 5 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  19. 19.🔋 A robot runs on 3 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  20. 20.🔋 What does a robot vacuum do when its battery is low? (a) turns into a car (b) goes back to its dock (c) keeps going for ever (d) explodes
  21. 21.🔋 A robot’s battery holds 700 mAh and the robot uses 100 mA. For how many hours can it run?
  22. 22.🔋 A robot’s battery is at 0% and charging adds 25% every 10 minutes. How many minutes until it is full (100%)?
  23. 23.🔋 A robot uses 25% of its battery every 6 minutes. How many minutes does a full battery (100%) last?
  24. 24.🔋 A robot’s battery holds 1400 mAh and the robot uses 200 mA. For how many hours can it run?
  25. 25.🔋 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%?
  26. 26.🔋 A robot’s battery holds 2000 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 25%. How many laps can it do before the battery reaches 0%?
  28. 28.🔋 A robot uses 2% of its battery every 3 minutes. How many minutes does a full battery (100%) last?
  29. 29.🔋 A robot uses 2% of its battery every 1 minute. How many minutes does a full battery (100%) last?
  30. 30.🔋 A robot’s battery holds 1200 mAh and the robot uses 200 mA. For how many hours can it run?
  31. 31.🔋 A robot runs on 2 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  32. 32.🔋 A robot’s battery is at 60% and charging adds 10% every 10 minutes. How many minutes until it is full (100%)?
  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’s battery is at 50%. Each lap of the track uses 25%. How many laps can it do before the battery reaches 0%?
  35. 35.🔋 A robot’s battery holds 1000 mAh and the robot uses 1000 mA. For how many hours can it run?
  36. 36.🔋 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%?
  37. 37.🔋 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%?
  38. 38.🔋 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%?
  39. 39.🔋 A robot’s battery holds 1000 mAh and the robot uses 500 mA. For how many hours can it run?
  40. 40.🔋 A robot’s battery holds 2000 mAh and the robot uses 500 mA. For how many hours can it run?

Answer key

  1. 3
  2. 2
  3. 3
  4. 10
  5. a rechargeable battery
  6. sunlight (solar panels)
  7. mAh
  8. 8
  9. 3
  10. 3
  11. 20
  12. a power cable
  13. 150
  14. 60
  15. 10.5
  16. 5
  17. 9
  18. 7.5
  19. 4.5
  20. goes back to its dock
  21. 7
  22. 40
  23. 24
  24. 7
  25. 4
  26. 2
  27. 4
  28. 150
  29. 50
  30. 6
  31. 3
  32. 40
  33. 10
  34. 2
  35. 1
  36. 14
  37. 5
  38. 3
  39. 2
  40. 4

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