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Robotics Worksheet: Robot Batteries

Robotics lesson 4: Power for robots · Set 67 · 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 30% and charging adds 10% every 10 minutes. How many minutes until it is full (100%)?
  2. 2.🔋 A robot’s battery is at 80%. Each lap of the track uses 20%. How many laps can it do before the battery reaches 0%?
  3. 3.🔋 Many robots on far-away planets get energy from … (a) wind-up keys (b) petrol pumps (c) sunlight (solar panels) (d) shop batteries
  4. 4.🔋 A robot’s battery is at 25% and charging adds 25% every 10 minutes. How many minutes until it is full (100%)?
  5. 5.🔋 A robot’s battery is at 90% and charging adds 10% every 10 minutes. How many minutes until it is full (100%)?
  6. 6.🔋 Battery capacity (how much it holds) is often written in … (a) km (b) kg (c) mAh (d) °C
  7. 7.🔋 A robot runs on 4 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  8. 8.🔋 What powers most moving robots? (a) a tiny magnet (b) a candle (c) a rechargeable battery (d) a water tank
  9. 9.🔋 A robot’s battery holds 500 mAh and the robot uses 500 mA. For how many hours can it run?
  10. 10.🔋 A robot’s battery is at 70%. Each lap of the track uses 10%. How many laps can it do before the battery reaches 0%?
  11. 11.🔋 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
  12. 12.🔋 A robot’s battery holds 800 mAh and the robot uses 100 mA. For how many hours can it run?
  13. 13.🔋 A robot’s battery is at 60%. Each lap of the track uses 10%. How many laps can it do before the battery reaches 0%?
  14. 14.🔋 A robot uses 10% of its battery every 6 minutes. How many minutes does a full battery (100%) last?
  15. 15.🔋 A robot uses 5% of its battery every 2 minutes. How many minutes does a full battery (100%) last?
  16. 16.🔋 A robot’s battery holds 1200 mAh and the robot uses 200 mA. For how many hours can it run?
  17. 17.🔋 A robot’s battery is at 0% and charging adds 25% every 10 minutes. How many minutes until it is full (100%)?
  18. 18.🔋 A robot’s battery holds 800 mAh and the robot uses 200 mA. For how many hours can it run?
  19. 19.🔋 A robot’s battery is at 70% and charging adds 10% every 10 minutes. How many minutes until it is full (100%)?
  20. 20.🔋 A robot runs on 2 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  21. 21.🔋 A robot uses 2% of its battery every 1 minute. How many minutes does a full battery (100%) last?
  22. 22.🔋 A robot’s battery is at 20% and charging adds 20% every 10 minutes. How many minutes until it is full (100%)?
  23. 23.🔋 A robot uses 4% of its battery every 4 minutes. How many minutes does a full battery (100%) last?
  24. 24.🔋 A robot’s battery holds 800 mAh and the robot uses 400 mA. For how many hours can it run?
  25. 25.🔋 A robot uses 25% of its battery every 2 minutes. How many minutes does a full battery (100%) last?
  26. 26.🔋 A robot uses 25% of its battery every 5 minutes. How many minutes does a full battery (100%) last?
  27. 27.🔋 A robot uses 2% of its battery every 6 minutes. How many minutes does a full battery (100%) last?
  28. 28.🔋 A robot’s battery holds 500 mAh and the robot uses 100 mA. For how many hours can it run?
  29. 29.🔋 A robot’s battery is at 45% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  30. 30.🔋 A robot uses 4% of its battery every 2 minutes. How many minutes does a full battery (100%) last?
  31. 31.🔋 A robot’s battery holds 200 mAh and the robot uses 100 mA. For how many hours can it run?
  32. 32.🔋 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%?
  33. 33.🔋 A robot uses 25% of its battery every 6 minutes. How many minutes does a full battery (100%) last?
  34. 34.🔋 What does a robot vacuum do when its battery is low? (a) turns into a car (b) explodes (c) goes back to its dock (d) keeps going for ever
  35. 35.🔋 A robot’s battery is at 20% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  36. 36.🔋 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%?
  37. 37.🔋 A robot’s battery holds 2400 mAh and the robot uses 400 mA. For how many hours can it run?
  38. 38.🔋 A robot’s battery is at 55%. Each lap of the track uses 5%. How many laps can it do before the battery reaches 0%?
  39. 39.🔋 A robot runs on 6 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  40. 40.🔋 A robot’s battery holds 400 mAh and the robot uses 100 mA. For how many hours can it run?

Answer key

  1. 70
  2. 4
  3. sunlight (solar panels)
  4. 30
  5. 10
  6. mAh
  7. 6
  8. a rechargeable battery
  9. 1
  10. 7
  11. give it to an adult
  12. 8
  13. 6
  14. 60
  15. 40
  16. 6
  17. 40
  18. 4
  19. 30
  20. 3
  21. 50
  22. 40
  23. 100
  24. 2
  25. 8
  26. 20
  27. 300
  28. 5
  29. 110
  30. 50
  31. 2
  32. 2
  33. 24
  34. goes back to its dock
  35. 160
  36. 4
  37. 6
  38. 11
  39. 9
  40. 4

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