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Robotics Worksheet: Robot Batteries

Robotics lesson 4: Power for robots · Set 24 · 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 15% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  2. 2.🔋 A robot’s battery holds 1200 mAh and the robot uses 200 mA. For how many hours can it run?
  3. 3.🔋 A robot arm bolted to a factory floor usually gets its power from … (a) a power cable (b) a coin cell (c) a solar panel (d) a wind-up key
  4. 4.🔋 A robot uses 25% of its battery every 5 minutes. How many minutes does a full battery (100%) last?
  5. 5.🔋 A robot uses 2% of its battery every 2 minutes. How many minutes does a full battery (100%) last?
  6. 6.🔋 A robot’s battery is at 10%. Each lap of the track uses 5%. How many laps can it do before the battery reaches 0%?
  7. 7.🔋 A robot runs on 2 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  8. 8.🔋 A robot uses 2% of its battery every 6 minutes. How many minutes does a full battery (100%) last?
  9. 9.🔋 A robot’s battery holds 7000 mAh and the robot uses 1000 mA. For how many hours can it run?
  10. 10.🔋 A robot’s battery is at 10% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  11. 11.🔋 A robot runs on 7 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  12. 12.🔋 A robot’s battery holds 1600 mAh and the robot uses 200 mA. For how many hours can it run?
  13. 13.🔋 A robot runs on 4 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  14. 14.🔋 A robot’s battery is at 60% and charging adds 10% every 10 minutes. How many minutes until it is full (100%)?
  15. 15.🔋 A robot’s battery holds 1750 mAh and the robot uses 250 mA. For how many hours can it run?
  16. 16.🔋 Many robots on far-away planets get energy from … (a) shop batteries (b) wind-up keys (c) sunlight (solar panels) (d) petrol pumps
  17. 17.🔋 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%?
  18. 18.🔋 A robot’s battery is at 60% and charging adds 20% every 10 minutes. How many minutes until it is full (100%)?
  19. 19.🔋 A robot’s battery is at 40% and charging adds 20% every 10 minutes. How many minutes until it is full (100%)?
  20. 20.🔋 A robot’s battery holds 3000 mAh and the robot uses 500 mA. For how many hours can it run?
  21. 21.🔋 A robot’s battery is at 40% and charging adds 10% every 10 minutes. How many minutes until it is full (100%)?
  22. 22.🔋 Battery capacity (how much it holds) is often written in … (a) km (b) mAh (c) kg (d) °C
  23. 23.🔋 What powers most moving robots? (a) a candle (b) a rechargeable battery (c) a water tank (d) a tiny magnet
  24. 24.🔋 A robot’s battery is at 20% and charging adds 10% every 10 minutes. How many minutes until it is full (100%)?
  25. 25.🔋 A robot runs on 6 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  26. 26.🔋 What does a robot vacuum do when its battery is low? (a) explodes (b) turns into a car (c) goes back to its dock (d) keeps going for ever
  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 75%. Each lap of the track uses 25%. How many laps can it do before the battery reaches 0%?
  29. 29.🔋 A robot uses 5% of its battery every 6 minutes. How many minutes does a full battery (100%) last?
  30. 30.🔋 A robot’s battery holds 400 mAh and the robot uses 100 mA. For how many hours can it run?
  31. 31.🔋 A robot uses 4% of its battery every 6 minutes. How many minutes does a full battery (100%) last?
  32. 32.🔋 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%?
  33. 33.🔋 A robot uses 20% of its battery every 5 minutes. How many minutes does a full battery (100%) last?
  34. 34.🔋 A robot’s battery is at 85%. Each lap of the track uses 5%. How many laps can it do before the battery reaches 0%?
  35. 35.🔋 A robot’s battery is at 75% and charging adds 25% every 10 minutes. How many minutes until it is full (100%)?
  36. 36.🔋 A robot’s battery holds 1600 mAh and the robot uses 400 mA. For how many hours can it run?
  37. 37.🔋 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%?
  38. 38.🔋 A robot uses 10% of its battery every 3 minutes. How many minutes does a full battery (100%) last?
  39. 39.🔋 A robot uses 5% of its battery every 4 minutes. How many minutes does a full battery (100%) last?
  40. 40.🔋 A robot uses 5% of its battery every 3 minutes. How many minutes does a full battery (100%) last?

Answer key

  1. 170
  2. 6
  3. a power cable
  4. 20
  5. 100
  6. 2
  7. 3
  8. 300
  9. 7
  10. 180
  11. 10.5
  12. 8
  13. 6
  14. 40
  15. 7
  16. sunlight (solar panels)
  17. 5
  18. 20
  19. 30
  20. 6
  21. 60
  22. mAh
  23. a rechargeable battery
  24. 80
  25. 9
  26. goes back to its dock
  27. give it to an adult
  28. 3
  29. 120
  30. 4
  31. 150
  32. 3
  33. 25
  34. 17
  35. 10
  36. 4
  37. 20
  38. 30
  39. 80
  40. 60

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