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Robotics Worksheet: Robot Batteries

Robotics lesson 4: Power for robots · Set 45 · 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.🔋 What does a robot vacuum do when its battery is low? (a) turns into a car (b) explodes (c) goes back to its dock (d) keeps going for ever
  2. 2.🔋 A robot uses 25% of its battery every 6 minutes. How many minutes does a full battery (100%) last?
  3. 3.🔋 A robot’s battery is at 95% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  4. 4.🔋 What powers most moving robots? (a) a water tank (b) a candle (c) a rechargeable battery (d) a tiny magnet
  5. 5.🔋 A robot runs on 7 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  6. 6.🔋 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%?
  7. 7.🔋 A robot’s battery holds 500 mAh and the robot uses 250 mA. For how many hours can it run?
  8. 8.🔋 A robot uses 2% of its battery every 2 minutes. How many minutes does a full battery (100%) last?
  9. 9.🔋 A robot uses 10% of its battery every 3 minutes. How many minutes does a full battery (100%) last?
  10. 10.🔋 A robot’s battery is at 80% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  11. 11.🔋 A robot’s battery holds 400 mAh and the robot uses 400 mA. For how many hours can it run?
  12. 12.🔋 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%?
  13. 13.🔋 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%?
  14. 14.🔋 Battery capacity (how much it holds) is often written in … (a) mAh (b) kg (c) km (d) °C
  15. 15.🔋 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%?
  16. 16.🔋 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%?
  17. 17.🔋 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%?
  18. 18.🔋 A robot’s battery holds 250 mAh and the robot uses 250 mA. For how many hours can it run?
  19. 19.🔋 A robot’s battery holds 2000 mAh and the robot uses 500 mA. For how many hours can it run?
  20. 20.🔋 A robot’s battery is at 30% and charging adds 10% every 10 minutes. How many minutes until it is full (100%)?
  21. 21.🔋 A robot’s battery is at 5% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  22. 22.🔋 A robot uses 25% of its battery every 4 minutes. How many minutes does a full battery (100%) last?
  23. 23.🔋 What should you do with a swollen or damaged robot battery? (a) squeeze it flat (b) charge it again (c) throw it in a fire (d) give it to an adult
  24. 24.🔋 A robot uses 20% of its battery every 2 minutes. How many minutes does a full battery (100%) last?
  25. 25.🔋 A robot uses 4% of its battery every 3 minutes. How many minutes does a full battery (100%) last?
  26. 26.🔋 A robot uses 20% of its battery every 5 minutes. How many minutes does a full battery (100%) last?
  27. 27.🔋 A robot’s battery is at 50% and charging adds 25% every 10 minutes. How many minutes until it is full (100%)?
  28. 28.🔋 A robot’s battery holds 1600 mAh and the robot uses 200 mA. For how many hours can it run?
  29. 29.🔋 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%?
  30. 30.🔋 A robot uses 20% of its battery every 4 minutes. How many minutes does a full battery (100%) last?
  31. 31.🔋 A robot runs on 4 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  32. 32.🔋 A robot’s battery is at 40% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  33. 33.🔋 A robot’s battery holds 100 mAh and the robot uses 100 mA. For how many hours can it run?
  34. 34.🔋 A robot uses 4% of its battery every 4 minutes. How many minutes does a full battery (100%) last?
  35. 35.🔋 A robot’s battery holds 2400 mAh and the robot uses 400 mA. For how many hours can it run?
  36. 36.🔋 A robot’s battery is at 60% and charging adds 10% every 10 minutes. How many minutes until it is full (100%)?
  37. 37.🔋 A robot’s battery is at 0% and charging adds 20% every 10 minutes. How many minutes until it is full (100%)?
  38. 38.🔋 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%?
  39. 39.🔋 A robot arm bolted to a factory floor usually gets its power from … (a) a wind-up key (b) a power cable (c) a solar panel (d) a coin cell
  40. 40.🔋 Many robots on far-away planets get energy from … (a) sunlight (solar panels) (b) wind-up keys (c) petrol pumps (d) shop batteries

Answer key

  1. goes back to its dock
  2. 24
  3. 10
  4. a rechargeable battery
  5. 10.5
  6. 9
  7. 2
  8. 100
  9. 30
  10. 40
  11. 1
  12. 10
  13. 3
  14. mAh
  15. 7
  16. 4
  17. 5
  18. 1
  19. 4
  20. 70
  21. 190
  22. 16
  23. give it to an adult
  24. 10
  25. 75
  26. 25
  27. 20
  28. 8
  29. 2
  30. 20
  31. 6
  32. 120
  33. 1
  34. 100
  35. 6
  36. 40
  37. 50
  38. 18
  39. a power cable
  40. sunlight (solar panels)

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