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Robotics Worksheet: Robot Batteries

Robotics lesson 4: Power for robots · Set 194 · 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 700 mAh and the robot uses 100 mA. For how many hours can it run?
  2. 2.🔋 What does a robot vacuum do when its battery is low? (a) goes back to its dock (b) turns into a car (c) explodes (d) keeps going for ever
  3. 3.🔋 A robot runs on 5 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  4. 4.🔋 A robot’s battery is at 20% and charging adds 10% every 10 minutes. How many minutes until it is full (100%)?
  5. 5.🔋 A robot’s battery holds 8000 mAh and the robot uses 1000 mA. For how many hours can it run?
  6. 6.🔋 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%?
  7. 7.🔋 A robot uses 25% of its battery every 2 minutes. How many minutes does a full battery (100%) last?
  8. 8.🔋 A robot uses 2% of its battery every 5 minutes. How many minutes does a full battery (100%) last?
  9. 9.🔋 A robot uses 4% of its battery every 3 minutes. How many minutes does a full battery (100%) last?
  10. 10.🔋 A robot uses 25% of its battery every 6 minutes. How many minutes does a full battery (100%) last?
  11. 11.🔋 A robot’s battery is at 70% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  12. 12.🔋 A robot’s battery is at 40% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  13. 13.🔋 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%?
  14. 14.🔋 A robot runs on 6 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  15. 15.🔋 A robot runs on 3 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  16. 16.🔋 A robot runs on 4 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  17. 17.🔋 A robot’s battery holds 3500 mAh and the robot uses 500 mA. For how many hours can it run?
  18. 18.🔋 A robot runs on 7 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  19. 19.🔋 What powers most moving robots? (a) a tiny magnet (b) a water tank (c) a candle (d) a rechargeable battery
  20. 20.🔋 A robot’s battery is at 40%. Each lap of the track uses 20%. How many laps can it do before the battery reaches 0%?
  21. 21.🔋 A robot’s battery is at 50% and charging adds 25% every 10 minutes. How many minutes until it is full (100%)?
  22. 22.🔋 A robot uses 25% of its battery every 5 minutes. How many minutes does a full battery (100%) last?
  23. 23.🔋 A robot’s battery holds 2000 mAh and the robot uses 1000 mA. For how many hours can it run?
  24. 24.🔋 A robot’s battery is at 15%. Each lap of the track uses 5%. How many laps can it do before the battery reaches 0%?
  25. 25.🔋 A robot uses 4% of its battery every 6 minutes. How many minutes does a full battery (100%) last?
  26. 26.🔋 Many robots on far-away planets get energy from … (a) shop batteries (b) wind-up keys (c) sunlight (solar panels) (d) petrol pumps
  27. 27.🔋 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
  28. 28.🔋 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%?
  29. 29.🔋 A robot’s battery holds 1000 mAh and the robot uses 200 mA. For how many hours can it run?
  30. 30.🔋 A robot’s battery is at 25% and charging adds 25% every 10 minutes. How many minutes until it is full (100%)?
  31. 31.🔋 A robot’s battery is at 30%. Each lap of the track uses 5%. How many laps can it do before the battery reaches 0%?
  32. 32.🔋 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%?
  33. 33.🔋 A robot’s battery is at 90%. Each lap of the track uses 10%. How many laps can it do before the battery reaches 0%?
  34. 34.🔋 A robot runs on 2 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  35. 35.🔋 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%?
  36. 36.🔋 A robot uses 20% of its battery every 2 minutes. How many minutes does a full battery (100%) last?
  37. 37.🔋 A robot’s battery is at 75% and charging adds 25% every 10 minutes. How many minutes until it is full (100%)?
  38. 38.🔋 A robot’s battery holds 1250 mAh and the robot uses 250 mA. For how many hours can it run?
  39. 39.🔋 A robot uses 20% of its battery every 5 minutes. How many minutes does a full battery (100%) last?
  40. 40.🔋 A robot’s battery holds 4000 mAh and the robot uses 500 mA. For how many hours can it run?

Answer key

  1. 7
  2. goes back to its dock
  3. 7.5
  4. 80
  5. 8
  6. 4
  7. 8
  8. 250
  9. 75
  10. 24
  11. 60
  12. 120
  13. 7
  14. 9
  15. 4.5
  16. 6
  17. 7
  18. 10.5
  19. a rechargeable battery
  20. 2
  21. 20
  22. 20
  23. 2
  24. 3
  25. 150
  26. sunlight (solar panels)
  27. give it to an adult
  28. 5
  29. 5
  30. 30
  31. 6
  32. 8
  33. 9
  34. 3
  35. 2
  36. 10
  37. 10
  38. 5
  39. 25
  40. 8

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