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Robotics Worksheet: Robot Batteries

Robotics lesson 4: Power for robots · Set 129 · 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 95% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  2. 2.🔋 A robot’s battery is at 40% and charging adds 20% every 10 minutes. How many minutes until it is full (100%)?
  3. 3.🔋 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%?
  4. 4.🔋 A robot uses 10% of its battery every 6 minutes. How many minutes does a full battery (100%) last?
  5. 5.🔋 A robot’s battery holds 500 mAh and the robot uses 100 mA. For how many hours can it run?
  6. 6.🔋 Many robots on far-away planets get energy from … (a) shop batteries (b) petrol pumps (c) sunlight (solar panels) (d) wind-up keys
  7. 7.🔋 A robot uses 5% of its battery every 3 minutes. How many minutes does a full battery (100%) last?
  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 40%. Each lap of the track uses 5%. How many laps can it do before the battery reaches 0%?
  10. 10.🔋 A robot uses 5% of its battery every 5 minutes. How many minutes does a full battery (100%) last?
  11. 11.🔋 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%?
  12. 12.🔋 A robot’s battery holds 700 mAh and the robot uses 100 mA. For how many hours can it run?
  13. 13.🔋 Battery capacity (how much it holds) is often written in … (a) kg (b) mAh (c) °C (d) km
  14. 14.🔋 What should you do with a swollen or damaged robot battery? (a) charge it again (b) give it to an adult (c) squeeze it flat (d) throw it in a fire
  15. 15.🔋 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%?
  16. 16.🔋 A robot runs on 3 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  17. 17.🔋 What powers most moving robots? (a) a candle (b) a tiny magnet (c) a water tank (d) a rechargeable battery
  18. 18.🔋 A robot runs on 8 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  19. 19.🔋 A robot runs on 7 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  20. 20.🔋 A robot’s battery is at 85% 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 3 minutes. How many minutes does a full battery (100%) last?
  22. 22.🔋 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%?
  23. 23.🔋 A robot uses 4% of its battery every 3 minutes. How many minutes does a full battery (100%) last?
  24. 24.🔋 A robot runs on 2 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  25. 25.🔋 A robot uses 4% of its battery every 1 minute. How many minutes does a full battery (100%) last?
  26. 26.🔋 A robot’s battery holds 1400 mAh and the robot uses 200 mA. For how many hours can it run?
  27. 27.🔋 A robot’s battery holds 800 mAh and the robot uses 400 mA. For how many hours can it run?
  28. 28.🔋 A robot’s battery is at 25% and charging adds 25% every 10 minutes. How many minutes until it is full (100%)?
  29. 29.🔋 A robot’s battery holds 4000 mAh and the robot uses 1000 mA. For how many hours can it run?
  30. 30.🔋 A robot’s battery holds 6000 mAh and the robot uses 1000 mA. For how many hours can it run?
  31. 31.🔋 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%?
  32. 32.🔋 A robot’s battery is at 100%. Each lap of the track uses 5%. How many laps can it do before the battery reaches 0%?
  33. 33.🔋 A robot’s battery is at 10%. Each lap of the track uses 5%. How many laps can it do before the battery reaches 0%?
  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 uses 5% of its battery every 1 minute. How many minutes does a full battery (100%) last?
  36. 36.🔋 A robot’s battery holds 1600 mAh and the robot uses 200 mA. For how many hours can it run?
  37. 37.🔋 A robot uses 4% of its battery every 4 minutes. How many minutes does a full battery (100%) last?
  38. 38.🔋 A robot’s battery is at 0% and charging adds 20% every 10 minutes. How many minutes until it is full (100%)?
  39. 39.🔋 A robot’s battery holds 2000 mAh and the robot uses 400 mA. For how many hours can it run?
  40. 40.🔋 A robot’s battery holds 500 mAh and the robot uses 250 mA. For how many hours can it run?

Answer key

  1. 10
  2. 30
  3. 3
  4. 60
  5. 5
  6. sunlight (solar panels)
  7. 60
  8. 50
  9. 8
  10. 100
  11. 7
  12. 7
  13. mAh
  14. give it to an adult
  15. 3
  16. 4.5
  17. a rechargeable battery
  18. 12
  19. 10.5
  20. 30
  21. 12
  22. 6
  23. 75
  24. 3
  25. 25
  26. 7
  27. 2
  28. 30
  29. 4
  30. 6
  31. 10
  32. 20
  33. 2
  34. goes back to its dock
  35. 20
  36. 8
  37. 100
  38. 50
  39. 5
  40. 2

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