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Robotics Worksheet: Robot Batteries

Robotics lesson 4: Power for robots · Set 100 · 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 2% of its battery every 2 minutes. How many minutes does a full battery (100%) last?
  2. 2.🔋 A robot’s battery is at 15% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  3. 3.🔋 A robot’s battery holds 700 mAh and the robot uses 100 mA. For how many hours can it run?
  4. 4.🔋 A robot’s battery is at 0% and charging adds 25% every 10 minutes. How many minutes until it is full (100%)?
  5. 5.🔋 A robot’s battery is at 90% and charging adds 10% every 10 minutes. How many minutes until it is full (100%)?
  6. 6.🔋 A robot runs on 8 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  7. 7.🔋 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
  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’s battery is at 25% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  10. 10.🔋 A robot’s battery holds 200 mAh and the robot uses 200 mA. For how many hours can it run?
  11. 11.🔋 A robot arm bolted to a factory floor usually gets its power from … (a) a coin cell (b) a solar panel (c) a wind-up key (d) a power cable
  12. 12.🔋 What powers most moving robots? (a) a water tank (b) a rechargeable battery (c) a tiny magnet (d) a candle
  13. 13.🔋 A robot runs on 2 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  14. 14.🔋 A robot’s battery is at 20% and charging adds 10% every 10 minutes. How many minutes until it is full (100%)?
  15. 15.🔋 A robot’s battery holds 3000 mAh and the robot uses 500 mA. For how many hours can it run?
  16. 16.🔋 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%?
  17. 17.🔋 A robot’s battery holds 4000 mAh and the robot uses 1000 mA. For how many hours can it run?
  18. 18.🔋 A robot’s battery is at 30% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  19. 19.🔋 A robot’s battery is at 80% and charging adds 20% every 10 minutes. How many minutes until it is full (100%)?
  20. 20.🔋 A robot’s battery is at 80% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  21. 21.🔋 A robot’s battery holds 1000 mAh and the robot uses 1000 mA. For how many hours can it run?
  22. 22.🔋 A robot’s battery holds 7000 mAh and the robot uses 1000 mA. For how many hours can it run?
  23. 23.🔋 A robot uses 25% of its battery every 6 minutes. How many minutes does a full battery (100%) last?
  24. 24.🔋 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%?
  25. 25.🔋 A robot uses 25% of its battery every 2 minutes. How many minutes does a full battery (100%) last?
  26. 26.🔋 A robot uses 4% of its battery every 6 minutes. How many minutes does a full battery (100%) last?
  27. 27.🔋 Battery capacity (how much it holds) is often written in … (a) mAh (b) kg (c) km (d) °C
  28. 28.🔋 Many robots on far-away planets get energy from … (a) petrol pumps (b) shop batteries (c) sunlight (solar panels) (d) wind-up keys
  29. 29.🔋 What does a robot vacuum do when its battery is low? (a) keeps going for ever (b) goes back to its dock (c) turns into a car (d) explodes
  30. 30.🔋 A robot’s battery is at 55% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  31. 31.🔋 A robot’s battery is at 20% and charging adds 20% every 10 minutes. How many minutes until it is full (100%)?
  32. 32.🔋 A robot’s battery is at 65% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  33. 33.🔋 A robot uses 25% of its battery every 5 minutes. How many minutes does a full battery (100%) last?
  34. 34.🔋 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%?
  35. 35.🔋 A robot uses 4% of its battery every 5 minutes. How many minutes does a full battery (100%) last?
  36. 36.🔋 A robot’s battery holds 1200 mAh and the robot uses 400 mA. For how many hours can it run?
  37. 37.🔋 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%?
  38. 38.🔋 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%?
  39. 39.🔋 A robot uses 2% of its battery every 6 minutes. How many minutes does a full battery (100%) last?
  40. 40.🔋 A robot’s battery holds 250 mAh and the robot uses 250 mA. For how many hours can it run?

Answer key

  1. 100
  2. 170
  3. 7
  4. 40
  5. 10
  6. 12
  7. give it to an adult
  8. 6
  9. 150
  10. 1
  11. a power cable
  12. a rechargeable battery
  13. 3
  14. 80
  15. 6
  16. 3
  17. 4
  18. 140
  19. 10
  20. 40
  21. 1
  22. 7
  23. 24
  24. 6
  25. 8
  26. 150
  27. mAh
  28. sunlight (solar panels)
  29. goes back to its dock
  30. 90
  31. 40
  32. 70
  33. 20
  34. 18
  35. 125
  36. 3
  37. 2
  38. 5
  39. 300
  40. 1

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