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Robotics Worksheet: Robot Batteries

Robotics lesson 4: Power for robots · Set 814 · 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 20% and charging adds 20% every 10 minutes. How many minutes until it is full (100%)?
  2. 2.🔋 Battery capacity (how much it holds) is often written in … (a) km (b) °C (c) kg (d) mAh
  3. 3.🔋 A robot uses 2% of its battery every 1 minute. How many minutes does a full battery (100%) last?
  4. 4.🔋 A robot arm bolted to a factory floor usually gets its power from … (a) a wind-up key (b) a solar panel (c) a coin cell (d) a power cable
  5. 5.🔋 A robot’s battery is at 40%. Each lap of the track uses 5%. How many laps can it do before the battery reaches 0%?
  6. 6.🔋 A robot runs on 2 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  7. 7.🔋 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%?
  8. 8.🔋 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%?
  9. 9.🔋 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%?
  10. 10.🔋 A robot’s battery holds 2800 mAh and the robot uses 400 mA. For how many hours can it run?
  11. 11.🔋 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%?
  12. 12.🔋 A robot runs on 4 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  13. 13.🔋 A robot’s battery is at 50% and charging adds 10% every 10 minutes. How many minutes until it is full (100%)?
  14. 14.🔋 A robot uses 20% of its battery every 4 minutes. How many minutes does a full battery (100%) last?
  15. 15.🔋 A robot runs on 8 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  16. 16.🔋 A robot’s battery holds 2000 mAh and the robot uses 1000 mA. For how many hours can it run?
  17. 17.🔋 A robot uses 2% of its battery every 4 minutes. How many minutes does a full battery (100%) last?
  18. 18.🔋 A robot’s battery holds 4000 mAh and the robot uses 500 mA. For how many hours can it run?
  19. 19.🔋 A robot’s battery holds 2500 mAh and the robot uses 500 mA. For how many hours can it run?
  20. 20.🔋 What powers most moving robots? (a) a candle (b) a tiny magnet (c) a water tank (d) a rechargeable battery
  21. 21.🔋 A robot’s battery is at 60% and charging adds 20% every 10 minutes. How many minutes until it is full (100%)?
  22. 22.🔋 What should you do with a swollen or damaged robot battery? (a) charge it again (b) throw it in a fire (c) squeeze it flat (d) give it to an adult
  23. 23.🔋 A robot’s battery holds 750 mAh and the robot uses 250 mA. For how many hours can it run?
  24. 24.🔋 A robot’s battery holds 1200 mAh and the robot uses 200 mA. For how many hours can it run?
  25. 25.🔋 A robot uses 4% of its battery every 5 minutes. How many minutes does a full battery (100%) last?
  26. 26.🔋 A robot runs on 5 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  27. 27.🔋 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%?
  28. 28.🔋 Many robots on far-away planets get energy from … (a) wind-up keys (b) shop batteries (c) petrol pumps (d) sunlight (solar panels)
  29. 29.🔋 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
  30. 30.🔋 A robot’s battery is at 50% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  31. 31.🔋 A robot runs on 7 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  32. 32.🔋 A robot’s battery is at 80%. Each lap of the track uses 10%. How many laps can it do before the battery reaches 0%?
  33. 33.🔋 A robot uses 10% of its battery every 4 minutes. How many minutes does a full battery (100%) last?
  34. 34.🔋 A robot’s battery is at 20%. Each lap of the track uses 10%. How many laps can it do before the battery reaches 0%?
  35. 35.🔋 A robot uses 4% of its battery every 4 minutes. How many minutes does a full battery (100%) last?
  36. 36.🔋 A robot’s battery is at 20% and charging adds 10% every 10 minutes. How many minutes until it is full (100%)?
  37. 37.🔋 A robot uses 25% of its battery every 5 minutes. How many minutes does a full battery (100%) last?
  38. 38.🔋 A robot’s battery holds 3200 mAh and the robot uses 400 mA. For how many hours can it run?
  39. 39.🔋 A robot’s battery holds 1000 mAh and the robot uses 250 mA. For how many hours can it run?
  40. 40.🔋 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%?

Answer key

  1. 40
  2. mAh
  3. 50
  4. a power cable
  5. 8
  6. 3
  7. 2
  8. 3
  9. 9
  10. 7
  11. 17
  12. 6
  13. 50
  14. 20
  15. 12
  16. 2
  17. 200
  18. 8
  19. 5
  20. a rechargeable battery
  21. 20
  22. give it to an adult
  23. 3
  24. 6
  25. 125
  26. 7.5
  27. 2
  28. sunlight (solar panels)
  29. goes back to its dock
  30. 100
  31. 10.5
  32. 8
  33. 40
  34. 2
  35. 100
  36. 80
  37. 20
  38. 8
  39. 4
  40. 20

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