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Robotics Worksheet: Robot Batteries

Robotics lesson 4: Power for robots · Set 950 · 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 400 mAh and the robot uses 200 mA. For how many hours can it run?
  2. 2.🔋 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%?
  3. 3.🔋 A robot’s battery holds 500 mAh and the robot uses 500 mA. For how many hours can it run?
  4. 4.🔋 A robot arm bolted to a factory floor usually gets its power from … (a) a power cable (b) a coin cell (c) a solar panel (d) a wind-up key
  5. 5.🔋 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%?
  6. 6.🔋 A robot’s battery is at 0% and charging adds 20% every 10 minutes. How many minutes until it is full (100%)?
  7. 7.🔋 A robot’s battery is at 75% and charging adds 25% every 10 minutes. How many minutes until it is full (100%)?
  8. 8.🔋 A robot uses 4% of its battery every 5 minutes. How many minutes does a full battery (100%) last?
  9. 9.🔋 A robot uses 2% of its battery every 2 minutes. How many minutes does a full battery (100%) last?
  10. 10.🔋 A robot’s battery is at 50% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  11. 11.🔋 A robot’s battery holds 2800 mAh and the robot uses 400 mA. For how many hours can it run?
  12. 12.🔋 A robot’s battery holds 3000 mAh and the robot uses 1000 mA. For how many hours can it run?
  13. 13.🔋 Many robots on far-away planets get energy from … (a) shop batteries (b) sunlight (solar panels) (c) petrol pumps (d) wind-up keys
  14. 14.🔋 A robot’s battery holds 1000 mAh and the robot uses 500 mA. For how many hours can it run?
  15. 15.🔋 A robot’s battery is at 80% and charging adds 20% every 10 minutes. How many minutes until it is full (100%)?
  16. 16.🔋 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%?
  17. 17.🔋 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%?
  18. 18.🔋 A robot uses 2% of its battery every 4 minutes. How many minutes does a full battery (100%) last?
  19. 19.🔋 A robot runs on 4 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  20. 20.🔋 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%?
  21. 21.🔋 A robot’s battery holds 4000 mAh and the robot uses 1000 mA. For how many hours can it run?
  22. 22.🔋 A robot runs on 5 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  23. 23.🔋 A robot uses 2% of its battery every 6 minutes. How many minutes does a full battery (100%) last?
  24. 24.🔋 A robot’s battery holds 400 mAh and the robot uses 400 mA. For how many hours can it run?
  25. 25.🔋 A robot’s battery is at 20% and charging adds 20% every 10 minutes. How many minutes until it is full (100%)?
  26. 26.🔋 A robot runs on 3 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  27. 27.🔋 A robot’s battery is at 0% and charging adds 25% every 10 minutes. How many minutes until it is full (100%)?
  28. 28.🔋 Battery capacity (how much it holds) is often written in … (a) mAh (b) kg (c) °C (d) km
  29. 29.🔋 What powers most moving robots? (a) a rechargeable battery (b) a tiny magnet (c) a water tank (d) a candle
  30. 30.🔋 A robot’s battery is at 15% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  31. 31.🔋 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%?
  32. 32.🔋 A robot’s battery is at 40% and charging adds 20% every 10 minutes. How many minutes until it is full (100%)?
  33. 33.🔋 A robot’s battery is at 45% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  34. 34.🔋 A robot’s battery holds 4000 mAh and the robot uses 500 mA. For how many hours can it run?
  35. 35.🔋 A robot’s battery is at 55% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  36. 36.🔋 A robot’s battery holds 2000 mAh and the robot uses 1000 mA. For how many hours can it run?
  37. 37.🔋 A robot runs on 2 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  38. 38.🔋 A robot’s battery is at 10% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  39. 39.🔋 A robot’s battery holds 1200 mAh and the robot uses 200 mA. For how many hours can it run?
  40. 40.🔋 A robot’s battery is at 100%. Each lap of the track uses 10%. How many laps can it do before the battery reaches 0%?

Answer key

  1. 2
  2. 3
  3. 1
  4. a power cable
  5. 2
  6. 50
  7. 10
  8. 125
  9. 100
  10. 100
  11. 7
  12. 3
  13. sunlight (solar panels)
  14. 2
  15. 10
  16. 4
  17. 16
  18. 200
  19. 6
  20. 3
  21. 4
  22. 7.5
  23. 300
  24. 1
  25. 40
  26. 4.5
  27. 40
  28. mAh
  29. a rechargeable battery
  30. 170
  31. 5
  32. 30
  33. 110
  34. 8
  35. 90
  36. 2
  37. 3
  38. 180
  39. 6
  40. 10

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