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Robotics Worksheet: Robot Batteries

Robotics lesson 4: Power for robots · Set 725 · 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 runs on 3 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  2. 2.🔋 What does a robot vacuum do when its battery is low? (a) turns into a car (b) keeps going for ever (c) explodes (d) goes back to its dock
  3. 3.🔋 A robot uses 5% of its battery every 6 minutes. How many minutes does a full battery (100%) last?
  4. 4.🔋 A robot uses 25% of its battery every 3 minutes. How many minutes does a full battery (100%) last?
  5. 5.🔋 Battery capacity (how much it holds) is often written in … (a) °C (b) mAh (c) kg (d) km
  6. 6.🔋 What powers most moving robots? (a) a rechargeable battery (b) a water tank (c) a tiny magnet (d) a candle
  7. 7.🔋 A robot’s battery is at 10% and charging adds 10% every 10 minutes. How many minutes until it is full (100%)?
  8. 8.🔋 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
  9. 9.🔋 A robot’s battery is at 30% and charging adds 10% every 10 minutes. How many minutes until it is full (100%)?
  10. 10.🔋 A robot’s battery holds 700 mAh and the robot uses 100 mA. For how many hours can it run?
  11. 11.🔋 A robot uses 4% of its battery every 1 minute. How many minutes does a full battery (100%) last?
  12. 12.🔋 A robot’s battery is at 20% and charging adds 20% every 10 minutes. How many minutes until it is full (100%)?
  13. 13.🔋 A robot’s battery is at 20% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  14. 14.🔋 A robot’s battery is at 80% and charging adds 20% every 10 minutes. How many minutes until it is full (100%)?
  15. 15.🔋 A robot runs on 2 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  16. 16.🔋 A robot uses 2% of its battery every 2 minutes. How many minutes does a full battery (100%) last?
  17. 17.🔋 A robot uses 25% of its battery every 1 minute. How many minutes does a full battery (100%) last?
  18. 18.🔋 A robot’s battery holds 2000 mAh and the robot uses 250 mA. For how many hours can it run?
  19. 19.🔋 A robot’s battery holds 800 mAh and the robot uses 200 mA. For how many hours can it run?
  20. 20.🔋 A robot runs on 8 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  21. 21.🔋 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%?
  22. 22.🔋 A robot’s battery holds 1500 mAh and the robot uses 500 mA. For how many hours can it run?
  23. 23.🔋 Many robots on far-away planets get energy from … (a) sunlight (solar panels) (b) petrol pumps (c) shop batteries (d) wind-up keys
  24. 24.🔋 A robot’s battery is at 90% and charging adds 10% every 10 minutes. How many minutes until it is full (100%)?
  25. 25.🔋 A robot’s battery holds 400 mAh and the robot uses 400 mA. For how many hours can it run?
  26. 26.🔋 A robot runs on 7 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  27. 27.🔋 A robot’s battery holds 5000 mAh and the robot uses 1000 mA. For how many hours can it run?
  28. 28.🔋 A robot uses 10% of its battery every 4 minutes. How many minutes does a full battery (100%) last?
  29. 29.🔋 A robot’s battery is at 0% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  30. 30.🔋 A robot uses 10% of its battery every 5 minutes. How many minutes does a full battery (100%) last?
  31. 31.🔋 A robot uses 25% of its battery every 5 minutes. How many minutes does a full battery (100%) last?
  32. 32.🔋 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%?
  33. 33.🔋 A robot’s battery holds 400 mAh and the robot uses 200 mA. For how many hours can it run?
  34. 34.🔋 A robot’s battery is at 80%. Each lap of the track uses 20%. How many laps can it do before the battery reaches 0%?
  35. 35.🔋 A robot uses 5% of its battery every 4 minutes. How many minutes does a full battery (100%) last?
  36. 36.🔋 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
  37. 37.🔋 A robot uses 5% of its battery every 3 minutes. How many minutes does a full battery (100%) last?
  38. 38.🔋 A robot runs on 4 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  39. 39.🔋 A robot’s battery is at 80% and charging adds 10% every 10 minutes. How many minutes until it is full (100%)?
  40. 40.🔋 A robot’s battery holds 1000 mAh and the robot uses 200 mA. For how many hours can it run?

Answer key

  1. 4.5
  2. goes back to its dock
  3. 120
  4. 12
  5. mAh
  6. a rechargeable battery
  7. 90
  8. give it to an adult
  9. 70
  10. 7
  11. 25
  12. 40
  13. 160
  14. 10
  15. 3
  16. 100
  17. 4
  18. 8
  19. 4
  20. 12
  21. 10
  22. 3
  23. sunlight (solar panels)
  24. 10
  25. 1
  26. 10.5
  27. 5
  28. 40
  29. 200
  30. 50
  31. 20
  32. 8
  33. 2
  34. 4
  35. 80
  36. a power cable
  37. 60
  38. 6
  39. 20
  40. 5

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