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Robotics Worksheet: Robot Batteries

Robotics lesson 4: Power for robots · Set 175 · 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.🔋 What powers most moving robots? (a) a candle (b) a water tank (c) a rechargeable battery (d) a tiny magnet
  2. 2.🔋 A robot’s battery holds 2000 mAh and the robot uses 1000 mA. For how many hours can it run?
  3. 3.🔋 A robot uses 20% of its battery every 2 minutes. How many minutes does a full battery (100%) last?
  4. 4.🔋 A robot’s battery holds 6000 mAh and the robot uses 1000 mA. For how many hours can it run?
  5. 5.🔋 A robot runs on 7 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  6. 6.🔋 A robot uses 5% of its battery every 3 minutes. How many minutes does a full battery (100%) last?
  7. 7.🔋 A robot uses 25% of its battery every 5 minutes. How many minutes does a full battery (100%) last?
  8. 8.🔋 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%?
  9. 9.🔋 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%?
  10. 10.🔋 A robot runs on 8 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  11. 11.🔋 A robot uses 4% of its battery every 5 minutes. How many minutes does a full battery (100%) last?
  12. 12.🔋 A robot’s battery holds 4000 mAh and the robot uses 500 mA. For how many hours can it run?
  13. 13.🔋 A robot’s battery holds 2400 mAh and the robot uses 400 mA. For how many hours can it run?
  14. 14.🔋 Many robots on far-away planets get energy from … (a) wind-up keys (b) shop batteries (c) petrol pumps (d) sunlight (solar panels)
  15. 15.🔋 A robot uses 10% of its battery every 3 minutes. How many minutes does a full battery (100%) last?
  16. 16.🔋 A robot uses 4% of its battery every 3 minutes. How many minutes does a full battery (100%) last?
  17. 17.🔋 A robot’s battery is at 0% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  18. 18.🔋 A robot runs on 3 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  19. 19.🔋 What should you do with a swollen or damaged robot battery? (a) give it to an adult (b) throw it in a fire (c) charge it again (d) squeeze it flat
  20. 20.🔋 A robot uses 4% of its battery every 4 minutes. How many minutes does a full battery (100%) last?
  21. 21.🔋 A robot’s battery is at 70% and charging adds 10% every 10 minutes. How many minutes until it is full (100%)?
  22. 22.🔋 A robot’s battery is at 25%. Each lap of the track uses 5%. How many laps can it do before the battery reaches 0%?
  23. 23.🔋 A robot’s battery holds 1600 mAh and the robot uses 200 mA. For how many hours can it run?
  24. 24.🔋 A robot uses 25% of its battery every 2 minutes. How many minutes does a full battery (100%) last?
  25. 25.🔋 A robot’s battery is at 50%. Each lap of the track uses 10%. How many laps can it do before the battery reaches 0%?
  26. 26.🔋 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
  27. 27.🔋 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%?
  28. 28.🔋 A robot’s battery is at 45%. Each lap of the track uses 5%. How many laps can it do before the battery reaches 0%?
  29. 29.🔋 A robot’s battery is at 0% and charging adds 25% every 10 minutes. How many minutes until it is full (100%)?
  30. 30.🔋 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%?
  31. 31.🔋 A robot uses 2% of its battery every 1 minute. How many minutes does a full battery (100%) last?
  32. 32.🔋 A robot’s battery is at 80% and charging adds 20% every 10 minutes. How many minutes until it is full (100%)?
  33. 33.🔋 A robot runs on 5 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  34. 34.🔋 A robot’s battery is at 20%. Each lap of the track uses 10%. How many laps can it do before the battery reaches 0%?
  35. 35.🔋 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%?
  36. 36.🔋 A robot’s battery holds 500 mAh and the robot uses 500 mA. For how many hours can it run?
  37. 37.🔋 A robot’s battery holds 1600 mAh and the robot uses 400 mA. For how many hours can it run?
  38. 38.🔋 A robot’s battery holds 100 mAh and the robot uses 100 mA. For how many hours can it run?
  39. 39.🔋 A robot uses 2% of its battery every 6 minutes. How many minutes does a full battery (100%) last?
  40. 40.🔋 A robot uses 5% of its battery every 2 minutes. How many minutes does a full battery (100%) last?

Answer key

  1. a rechargeable battery
  2. 2
  3. 10
  4. 6
  5. 10.5
  6. 60
  7. 20
  8. 4
  9. 3
  10. 12
  11. 125
  12. 8
  13. 6
  14. sunlight (solar panels)
  15. 30
  16. 75
  17. 200
  18. 4.5
  19. give it to an adult
  20. 100
  21. 30
  22. 5
  23. 8
  24. 8
  25. 5
  26. goes back to its dock
  27. 20
  28. 9
  29. 40
  30. 2
  31. 50
  32. 10
  33. 7.5
  34. 2
  35. 6
  36. 1
  37. 4
  38. 1
  39. 300
  40. 40

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