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Robotics Worksheet: Robot Batteries

Robotics lesson 4: Power for robots · Set 140 · 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 25% of its battery every 6 minutes. How many minutes does a full battery (100%) last?
  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 runs on 7 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  4. 4.🔋 Many robots on far-away planets get energy from … (a) sunlight (solar panels) (b) petrol pumps (c) shop batteries (d) wind-up keys
  5. 5.🔋 A robot’s battery holds 250 mAh and the robot uses 250 mA. For how many hours can it run?
  6. 6.🔋 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%?
  7. 7.🔋 A robot’s battery is at 50% and charging adds 25% every 10 minutes. How many minutes until it is full (100%)?
  8. 8.🔋 A robot runs on 4 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  9. 9.🔋 A robot’s battery holds 500 mAh and the robot uses 100 mA. For how many hours can it run?
  10. 10.🔋 What does a robot vacuum do when its battery is low? (a) goes back to its dock (b) keeps going for ever (c) turns into a car (d) explodes
  11. 11.🔋 A robot runs on 8 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  12. 12.🔋 A robot’s battery is at 80% and charging adds 10% every 10 minutes. How many minutes until it is full (100%)?
  13. 13.🔋 A robot uses 10% of its battery every 6 minutes. How many minutes does a full battery (100%) last?
  14. 14.🔋 A robot’s battery holds 400 mAh and the robot uses 100 mA. For how many hours can it run?
  15. 15.🔋 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%?
  16. 16.🔋 A robot runs on 6 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  17. 17.🔋 What should you do with a swollen or damaged robot battery? (a) throw it in a fire (b) squeeze it flat (c) give it to an adult (d) charge it again
  18. 18.🔋 A robot’s battery holds 500 mAh and the robot uses 500 mA. For how many hours can it run?
  19. 19.🔋 What powers most moving robots? (a) a tiny magnet (b) a rechargeable battery (c) a water tank (d) a candle
  20. 20.🔋 A robot uses 5% of its battery every 3 minutes. How many minutes does a full battery (100%) last?
  21. 21.🔋 A robot’s battery holds 4000 mAh and the robot uses 1000 mA. For how many hours can it run?
  22. 22.🔋 A robot uses 25% of its battery every 3 minutes. How many minutes does a full battery (100%) last?
  23. 23.🔋 A robot’s battery is at 50%. Each lap of the track uses 10%. How many laps can it do before the battery reaches 0%?
  24. 24.🔋 A robot’s battery holds 200 mAh and the robot uses 100 mA. For how many hours can it run?
  25. 25.🔋 A robot arm bolted to a factory floor usually gets its power from … (a) a solar panel (b) a coin cell (c) a wind-up key (d) a power cable
  26. 26.🔋 A robot’s battery holds 2800 mAh and the robot uses 400 mA. For how many hours can it run?
  27. 27.🔋 A robot uses 4% of its battery every 5 minutes. How many minutes does a full battery (100%) last?
  28. 28.🔋 A robot uses 4% of its battery every 4 minutes. How many minutes does a full battery (100%) last?
  29. 29.🔋 A robot’s battery holds 5000 mAh and the robot uses 1000 mA. For how many hours can it run?
  30. 30.🔋 A robot uses 4% of its battery every 6 minutes. How many minutes does a full battery (100%) last?
  31. 31.🔋 A robot’s battery is at 0% and charging adds 25% every 10 minutes. How many minutes until it is full (100%)?
  32. 32.🔋 A robot uses 10% of its battery every 4 minutes. How many minutes does a full battery (100%) last?
  33. 33.🔋 A robot uses 10% of its battery every 1 minute. How many minutes does a full battery (100%) last?
  34. 34.🔋 A robot uses 25% of its battery every 4 minutes. How many minutes does a full battery (100%) last?
  35. 35.🔋 Battery capacity (how much it holds) is often written in … (a) mAh (b) kg (c) km (d) °C
  36. 36.🔋 A robot’s battery holds 1000 mAh and the robot uses 500 mA. For how many hours can it run?
  37. 37.🔋 A robot’s battery is at 60%. Each lap of the track uses 5%. How many laps can it do before the battery reaches 0%?
  38. 38.🔋 A robot’s battery holds 100 mAh and the robot uses 100 mA. For how many hours can it run?
  39. 39.🔋 A robot’s battery holds 2000 mAh and the robot uses 250 mA. For how many hours can it run?
  40. 40.🔋 A robot uses 5% of its battery every 6 minutes. How many minutes does a full battery (100%) last?

Answer key

  1. 24
  2. 6
  3. 10.5
  4. sunlight (solar panels)
  5. 1
  6. 2
  7. 20
  8. 6
  9. 5
  10. goes back to its dock
  11. 12
  12. 20
  13. 60
  14. 4
  15. 4
  16. 9
  17. give it to an adult
  18. 1
  19. a rechargeable battery
  20. 60
  21. 4
  22. 12
  23. 5
  24. 2
  25. a power cable
  26. 7
  27. 125
  28. 100
  29. 5
  30. 150
  31. 40
  32. 40
  33. 10
  34. 16
  35. mAh
  36. 2
  37. 12
  38. 1
  39. 8
  40. 120

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