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Robotics Worksheet: Robot Batteries

Robotics lesson 4: Power for robots · Set 974 · 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 uses 10% of its battery every 4 minutes. How many minutes does a full battery (100%) last?
  2. 2.🔋 A robot uses 10% of its battery every 1 minute. How many minutes does a full battery (100%) last?
  3. 3.🔋 A robot’s battery is at 70%. Each lap of the track uses 5%. How many laps can it do before the battery reaches 0%?
  4. 4.🔋 A robot uses 25% of its battery every 6 minutes. How many minutes does a full battery (100%) last?
  5. 5.🔋 A robot’s battery is at 75% and charging adds 25% every 10 minutes. How many minutes until it is full (100%)?
  6. 6.🔋 Battery capacity (how much it holds) is often written in … (a) km (b) kg (c) °C (d) mAh
  7. 7.🔋 A robot’s battery is at 0% and charging adds 20% every 10 minutes. How many minutes until it is full (100%)?
  8. 8.🔋 What does a robot vacuum do when its battery is low? (a) turns into a car (b) keeps going for ever (c) goes back to its dock (d) explodes
  9. 9.🔋 A robot’s battery holds 4000 mAh and the robot uses 500 mA. For how many hours can it run?
  10. 10.🔋 A robot’s battery holds 400 mAh and the robot uses 200 mA. For how many hours can it run?
  11. 11.🔋 A robot’s battery holds 1000 mAh and the robot uses 1000 mA. For how many hours can it run?
  12. 12.🔋 A robot’s battery holds 1250 mAh and the robot uses 250 mA. For how many hours can it run?
  13. 13.🔋 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%?
  14. 14.🔋 A robot’s battery holds 1750 mAh and the robot uses 250 mA. For how many hours can it run?
  15. 15.🔋 A robot’s battery is at 0% and charging adds 10% every 10 minutes. How many minutes until it is full (100%)?
  16. 16.🔋 What powers most moving robots? (a) a water tank (b) a rechargeable battery (c) a candle (d) a tiny magnet
  17. 17.🔋 A robot runs on 7 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  18. 18.🔋 A robot’s battery holds 1600 mAh and the robot uses 400 mA. For how many hours can it run?
  19. 19.🔋 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%?
  20. 20.🔋 A robot’s battery holds 2000 mAh and the robot uses 400 mA. For how many hours can it run?
  21. 21.🔋 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
  22. 22.🔋 A robot runs on 4 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  23. 23.🔋 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%?
  24. 24.🔋 A robot runs on 6 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  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’s battery holds 7000 mAh and the robot uses 1000 mA. For how many hours can it run?
  27. 27.🔋 Many robots on far-away planets get energy from … (a) wind-up keys (b) shop batteries (c) sunlight (solar panels) (d) petrol pumps
  28. 28.🔋 A robot runs on 2 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  29. 29.🔋 A robot’s battery holds 200 mAh and the robot uses 200 mA. For how many hours can it run?
  30. 30.🔋 A robot’s battery is at 80% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  31. 31.🔋 A robot runs on 5 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  32. 32.🔋 A robot’s battery is at 55%. 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 20% and charging adds 10% every 10 minutes. How many minutes until it is full (100%)?
  34. 34.🔋 A robot’s battery is at 40% and charging adds 10% every 10 minutes. How many minutes until it is full (100%)?
  35. 35.🔋 A robot’s battery is at 20% and charging adds 20% every 10 minutes. How many minutes until it is full (100%)?
  36. 36.🔋 A robot uses 2% of its battery every 3 minutes. How many minutes does a full battery (100%) last?
  37. 37.🔋 A robot uses 25% of its battery every 3 minutes. How many minutes does a full battery (100%) last?
  38. 38.🔋 A robot runs on 8 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  39. 39.🔋 A robot’s battery is at 25% and charging adds 25% every 10 minutes. How many minutes until it is full (100%)?
  40. 40.🔋 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%?

Answer key

  1. 40
  2. 10
  3. 14
  4. 24
  5. 10
  6. mAh
  7. 50
  8. goes back to its dock
  9. 8
  10. 2
  11. 1
  12. 5
  13. 5
  14. 7
  15. 100
  16. a rechargeable battery
  17. 10.5
  18. 4
  19. 2
  20. 5
  21. give it to an adult
  22. 6
  23. 3
  24. 9
  25. 4
  26. 7
  27. sunlight (solar panels)
  28. 3
  29. 1
  30. 40
  31. 7.5
  32. 11
  33. 80
  34. 60
  35. 40
  36. 150
  37. 12
  38. 12
  39. 30
  40. 6

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