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Robotics Worksheet: Robot Batteries

Robotics lesson 4: Power for robots · Set 505 · 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 25%. Each lap of the track uses 5%. How many laps can it do before the battery reaches 0%?
  2. 2.🔋 A robot’s battery holds 100 mAh and the robot uses 100 mA. For how many hours can it run?
  3. 3.🔋 A robot’s battery is at 0% and charging adds 20% every 10 minutes. How many minutes until it is full (100%)?
  4. 4.🔋 A robot’s battery is at 90%. Each lap of the track uses 10%. How many laps can it do before the battery reaches 0%?
  5. 5.🔋 What does a robot vacuum do when its battery is low? (a) goes back to its dock (b) turns into a car (c) explodes (d) keeps going for ever
  6. 6.🔋 A robot’s battery is at 45% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  7. 7.🔋 A robot’s battery is at 0% and charging adds 25% every 10 minutes. How many minutes until it is full (100%)?
  8. 8.🔋 A robot’s battery holds 2400 mAh and the robot uses 400 mA. For how many hours can it run?
  9. 9.🔋 A robot uses 2% of its battery every 6 minutes. How many minutes does a full battery (100%) last?
  10. 10.🔋 A robot’s battery holds 400 mAh and the robot uses 400 mA. For how many hours can it run?
  11. 11.🔋 A robot uses 10% of its battery every 1 minute. How many minutes does a full battery (100%) last?
  12. 12.🔋 A robot’s battery holds 3200 mAh and the robot uses 400 mA. For how many hours can it run?
  13. 13.🔋 A robot’s battery holds 1000 mAh and the robot uses 250 mA. For how many hours can it run?
  14. 14.🔋 A robot’s battery is at 80% and charging adds 10% every 10 minutes. How many minutes until it is full (100%)?
  15. 15.🔋 A robot’s battery is at 80%. Each lap of the track uses 5%. How many laps can it do before the battery reaches 0%?
  16. 16.🔋 A robot’s battery is at 60% and charging adds 20% every 10 minutes. How many minutes until it is full (100%)?
  17. 17.🔋 What powers most moving robots? (a) a candle (b) a rechargeable battery (c) a tiny magnet (d) a water tank
  18. 18.🔋 A robot’s battery is at 60% and charging adds 10% every 10 minutes. How many minutes until it is full (100%)?
  19. 19.🔋 A robot uses 5% of its battery every 4 minutes. How many minutes does a full battery (100%) last?
  20. 20.🔋 A robot’s battery is at 65% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  21. 21.🔋 A robot’s battery holds 800 mAh and the robot uses 400 mA. For how many hours can it run?
  22. 22.🔋 A robot runs on 4 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  23. 23.🔋 Battery capacity (how much it holds) is often written in … (a) kg (b) km (c) mAh (d) °C
  24. 24.🔋 A robot runs on 2 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  25. 25.🔋 A robot uses 4% of its battery every 3 minutes. How many minutes does a full battery (100%) last?
  26. 26.🔋 What should you do with a swollen or damaged robot battery? (a) give it to an adult (b) squeeze it flat (c) charge it again (d) throw it in a fire
  27. 27.🔋 Many robots on far-away planets get energy from … (a) shop batteries (b) wind-up keys (c) sunlight (solar panels) (d) petrol pumps
  28. 28.🔋 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%?
  29. 29.🔋 A robot arm bolted to a factory floor usually gets its power from … (a) a coin cell (b) a wind-up key (c) a solar panel (d) a power cable
  30. 30.🔋 A robot’s battery holds 800 mAh and the robot uses 200 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 uses 4% of its battery every 4 minutes. How many minutes does a full battery (100%) last?
  33. 33.🔋 A robot uses 25% of its battery every 4 minutes. How many minutes does a full battery (100%) last?
  34. 34.🔋 A robot uses 10% of its battery every 4 minutes. How many minutes does a full battery (100%) last?
  35. 35.🔋 A robot’s battery is at 35%. Each lap of the track uses 5%. How many laps can it do before the battery reaches 0%?
  36. 36.🔋 A robot uses 10% of its battery every 5 minutes. How many minutes does a full battery (100%) last?
  37. 37.🔋 A robot uses 10% of its battery every 2 minutes. How many minutes does a full battery (100%) last?
  38. 38.🔋 A robot uses 5% of its battery every 2 minutes. How many minutes does a full battery (100%) last?
  39. 39.🔋 A robot uses 20% of its battery every 2 minutes. How many minutes does a full battery (100%) last?
  40. 40.🔋 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%?

Answer key

  1. 5
  2. 1
  3. 50
  4. 9
  5. goes back to its dock
  6. 110
  7. 40
  8. 6
  9. 300
  10. 1
  11. 10
  12. 8
  13. 4
  14. 20
  15. 16
  16. 20
  17. a rechargeable battery
  18. 40
  19. 80
  20. 70
  21. 2
  22. 6
  23. mAh
  24. 3
  25. 75
  26. give it to an adult
  27. sunlight (solar panels)
  28. 11
  29. a power cable
  30. 4
  31. 3
  32. 100
  33. 16
  34. 40
  35. 7
  36. 50
  37. 20
  38. 40
  39. 10
  40. 2

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