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Robotics Worksheet: Robot Batteries

Robotics lesson 4: Power for robots · Set 761 · 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 50% and charging adds 10% every 10 minutes. How many minutes until it is full (100%)?
  3. 3.🔋 A robot runs on 3 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  4. 4.🔋 A robot uses 5% of its battery every 1 minute. How many minutes does a full battery (100%) last?
  5. 5.🔋 What does a robot vacuum do when its battery is low? (a) keeps going for ever (b) turns into a car (c) goes back to its dock (d) explodes
  6. 6.🔋 A robot’s battery holds 3000 mAh and the robot uses 500 mA. For how many hours can it run?
  7. 7.🔋 A robot’s battery holds 2000 mAh and the robot uses 1000 mA. For how many hours can it run?
  8. 8.🔋 A robot’s battery holds 700 mAh and the robot uses 100 mA. For how many hours can it run?
  9. 9.🔋 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%?
  10. 10.🔋 What powers most moving robots? (a) a tiny magnet (b) a candle (c) a water tank (d) a rechargeable battery
  11. 11.🔋 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%?
  12. 12.🔋 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%?
  13. 13.🔋 A robot uses 2% of its battery every 1 minute. How many minutes does a full battery (100%) last?
  14. 14.🔋 A robot’s battery is at 0% and charging adds 10% every 10 minutes. How many minutes until it is full (100%)?
  15. 15.🔋 A robot runs on 4 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  16. 16.🔋 A robot’s battery holds 300 mAh and the robot uses 100 mA. For how many hours can it run?
  17. 17.🔋 Battery capacity (how much it holds) is often written in … (a) km (b) °C (c) kg (d) mAh
  18. 18.🔋 A robot’s battery holds 3200 mAh and the robot uses 400 mA. For how many hours can it run?
  19. 19.🔋 A robot uses 10% of its battery every 3 minutes. How many minutes does a full battery (100%) last?
  20. 20.🔋 A robot’s battery is at 90% and charging adds 10% every 10 minutes. How many minutes until it is full (100%)?
  21. 21.🔋 A robot uses 2% of its battery every 6 minutes. How many minutes does a full battery (100%) last?
  22. 22.🔋 A robot’s battery holds 1000 mAh and the robot uses 200 mA. For how many hours can it run?
  23. 23.🔋 A robot runs on 6 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  24. 24.🔋 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%?
  25. 25.🔋 A robot’s battery holds 250 mAh and the robot uses 250 mA. For how many hours can it run?
  26. 26.🔋 A robot runs on 7 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  27. 27.🔋 What should you do with a swollen or damaged robot battery? (a) throw it in a fire (b) squeeze it flat (c) give it to an adult (d) charge it again
  28. 28.🔋 A robot uses 4% of its battery every 2 minutes. How many minutes does a full battery (100%) last?
  29. 29.🔋 Many robots on far-away planets get energy from … (a) sunlight (solar panels) (b) wind-up keys (c) petrol pumps (d) shop batteries
  30. 30.🔋 A robot’s battery holds 500 mAh and the robot uses 100 mA. For how many hours can it run?
  31. 31.🔋 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%?
  32. 32.🔋 A robot’s battery holds 2000 mAh and the robot uses 250 mA. For how many hours can it run?
  33. 33.🔋 A robot’s battery holds 600 mAh and the robot uses 100 mA. For how many hours can it run?
  34. 34.🔋 A robot’s battery is at 65%. Each lap of the track uses 5%. How many laps can it do before the battery reaches 0%?
  35. 35.🔋 A robot uses 20% of its battery every 6 minutes. How many minutes does a full battery (100%) last?
  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 600 mAh and the robot uses 200 mA. For how many hours can it run?
  38. 38.🔋 A robot’s battery is at 0% and charging adds 25% every 10 minutes. How many minutes until it is full (100%)?
  39. 39.🔋 A robot’s battery is at 0% and charging adds 20% every 10 minutes. How many minutes until it is full (100%)?
  40. 40.🔋 A robot’s battery holds 200 mAh and the robot uses 100 mA. For how many hours can it run?

Answer key

  1. 70
  2. 50
  3. 4.5
  4. 20
  5. goes back to its dock
  6. 6
  7. 2
  8. 7
  9. 4
  10. a rechargeable battery
  11. 10
  12. 2
  13. 50
  14. 100
  15. 6
  16. 3
  17. mAh
  18. 8
  19. 30
  20. 10
  21. 300
  22. 5
  23. 9
  24. 7
  25. 1
  26. 10.5
  27. give it to an adult
  28. 50
  29. sunlight (solar panels)
  30. 5
  31. 3
  32. 8
  33. 6
  34. 13
  35. 30
  36. 4
  37. 3
  38. 40
  39. 50
  40. 2

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