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Robotics Worksheet: Robot Batteries

Robotics lesson 4: Power for robots · Set 227 · 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 100%. Each lap of the track uses 10%. How many laps can it do before the battery reaches 0%?
  2. 2.🔋 What does a robot vacuum do when its battery is low? (a) explodes (b) goes back to its dock (c) keeps going for ever (d) turns into a car
  3. 3.🔋 A robot uses 5% of its battery every 1 minute. How many minutes does a full battery (100%) last?
  4. 4.🔋 A robot’s battery holds 1200 mAh and the robot uses 200 mA. For how many hours can it run?
  5. 5.🔋 What powers most moving robots? (a) a tiny magnet (b) a water tank (c) a rechargeable battery (d) a candle
  6. 6.🔋 A robot’s battery is at 25% and charging adds 25% every 10 minutes. How many minutes until it is full (100%)?
  7. 7.🔋 A robot uses 10% of its battery every 2 minutes. How many minutes does a full battery (100%) last?
  8. 8.🔋 A robot’s battery is at 40%. Each lap of the track uses 10%. How many laps can it do before the battery reaches 0%?
  9. 9.🔋 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%?
  10. 10.🔋 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%?
  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 4000 mAh and the robot uses 500 mA. For how many hours can it run?
  13. 13.🔋 A robot’s battery is at 75% and charging adds 25% every 10 minutes. How many minutes until it is full (100%)?
  14. 14.🔋 A robot’s battery holds 2400 mAh and the robot uses 400 mA. For how many hours can it run?
  15. 15.🔋 A robot’s battery is at 60% and charging adds 20% every 10 minutes. How many minutes until it is full (100%)?
  16. 16.🔋 Many robots on far-away planets get energy from … (a) shop batteries (b) wind-up keys (c) petrol pumps (d) sunlight (solar panels)
  17. 17.🔋 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%?
  18. 18.🔋 A robot’s battery is at 0% and charging adds 10% every 10 minutes. How many minutes until it is full (100%)?
  19. 19.🔋 A robot’s battery is at 50% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  20. 20.🔋 A robot’s battery holds 4000 mAh and the robot uses 1000 mA. For how many hours can it run?
  21. 21.🔋 What should you do with a swollen or damaged robot battery? (a) squeeze it flat (b) give it to an adult (c) charge it again (d) throw it in a fire
  22. 22.🔋 A robot’s battery is at 65% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  23. 23.🔋 A robot’s battery is at 20% and charging adds 20% every 10 minutes. How many minutes until it is full (100%)?
  24. 24.🔋 A robot’s battery holds 500 mAh and the robot uses 250 mA. For how many hours can it run?
  25. 25.🔋 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%?
  26. 26.🔋 A robot runs on 2 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  27. 27.🔋 A robot’s battery holds 250 mAh and the robot uses 250 mA. For how many hours can it run?
  28. 28.🔋 A robot runs on 7 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  29. 29.🔋 Battery capacity (how much it holds) is often written in … (a) mAh (b) km (c) °C (d) kg
  30. 30.🔋 A robot uses 10% of its battery every 6 minutes. How many minutes does a full battery (100%) last?
  31. 31.🔋 A robot’s battery is at 70% and charging adds 10% every 10 minutes. How many minutes until it is full (100%)?
  32. 32.🔋 A robot runs on 5 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  33. 33.🔋 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%?
  34. 34.🔋 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%?
  35. 35.🔋 A robot uses 25% of its battery every 1 minute. How many minutes does a full battery (100%) last?
  36. 36.🔋 A robot’s battery is at 40% and charging adds 20% every 10 minutes. How many minutes until it is full (100%)?
  37. 37.🔋 A robot’s battery is at 90%. Each lap of the track uses 5%. How many laps can it do before the battery reaches 0%?
  38. 38.🔋 A robot uses 20% of its battery every 1 minute. How many minutes does a full battery (100%) last?
  39. 39.🔋 A robot’s battery holds 400 mAh and the robot uses 200 mA. For how many hours can it run?
  40. 40.🔋 A robot runs on 4 cells of 1.5 V joined in series. What is the total voltage (in volts)? =

Answer key

  1. 10
  2. goes back to its dock
  3. 20
  4. 6
  5. a rechargeable battery
  6. 30
  7. 20
  8. 4
  9. 2
  10. 3
  11. 7
  12. 8
  13. 10
  14. 6
  15. 20
  16. sunlight (solar panels)
  17. 3
  18. 100
  19. 100
  20. 4
  21. give it to an adult
  22. 70
  23. 40
  24. 2
  25. 4
  26. 3
  27. 1
  28. 10.5
  29. mAh
  30. 60
  31. 30
  32. 7.5
  33. 3
  34. 5
  35. 4
  36. 30
  37. 18
  38. 5
  39. 2
  40. 6

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