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Robotics Worksheet: Robot Batteries

Robotics lesson 4: Power for robots · Set 50 · 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 40% and charging adds 10% every 10 minutes. How many minutes until it is full (100%)?
  2. 2.🔋 A robot arm bolted to a factory floor usually gets its power from … (a) a coin cell (b) a solar panel (c) a power cable (d) a wind-up key
  3. 3.🔋 A robot’s battery is at 25% and charging adds 25% every 10 minutes. How many minutes until it is full (100%)?
  4. 4.🔋 A robot uses 10% of its battery every 3 minutes. How many minutes does a full battery (100%) last?
  5. 5.🔋 A robot’s battery is at 75% and charging adds 25% every 10 minutes. How many minutes until it is full (100%)?
  6. 6.🔋 A robot’s battery is at 20%. Each lap of the track uses 5%. How many laps can it do before the battery reaches 0%?
  7. 7.🔋 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
  8. 8.🔋 A robot’s battery holds 250 mAh and the robot uses 250 mA. For how many hours can it run?
  9. 9.🔋 A robot’s battery holds 750 mAh and the robot uses 250 mA. For how many hours can it run?
  10. 10.🔋 A robot runs on 3 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  11. 11.🔋 A robot’s battery holds 400 mAh and the robot uses 200 mA. For how many hours can it run?
  12. 12.🔋 A robot uses 4% of its battery every 1 minute. How many minutes does a full battery (100%) last?
  13. 13.🔋 A robot uses 25% of its battery every 4 minutes. How many minutes does a full battery (100%) last?
  14. 14.🔋 A robot uses 4% of its battery every 3 minutes. How many minutes does a full battery (100%) last?
  15. 15.🔋 A robot’s battery is at 60%. Each lap of the track uses 20%. How many laps can it do before the battery reaches 0%?
  16. 16.🔋 A robot uses 25% of its battery every 2 minutes. How many minutes does a full battery (100%) last?
  17. 17.🔋 A robot’s battery is at 50% and charging adds 25% every 10 minutes. How many minutes until it is full (100%)?
  18. 18.🔋 A robot’s battery holds 3000 mAh and the robot uses 1000 mA. For how many hours can it run?
  19. 19.🔋 A robot’s battery is at 60% and charging adds 20% every 10 minutes. How many minutes until it is full (100%)?
  20. 20.🔋 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%?
  21. 21.🔋 A robot runs on 6 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  22. 22.🔋 Many robots on far-away planets get energy from … (a) petrol pumps (b) shop batteries (c) wind-up keys (d) sunlight (solar panels)
  23. 23.🔋 A robot’s battery holds 2000 mAh and the robot uses 500 mA. For how many hours can it run?
  24. 24.🔋 A robot’s battery holds 1500 mAh and the robot uses 250 mA. For how many hours can it run?
  25. 25.🔋 A robot’s battery is at 0% and charging adds 20% every 10 minutes. How many minutes until it is full (100%)?
  26. 26.🔋 A robot’s battery holds 800 mAh and the robot uses 400 mA. For how many hours can it run?
  27. 27.🔋 A robot uses 20% of its battery every 1 minute. How many minutes does a full battery (100%) last?
  28. 28.🔋 A robot’s battery is at 30%. Each lap of the track uses 5%. How many laps can it do before the battery reaches 0%?
  29. 29.🔋 Battery capacity (how much it holds) is often written in … (a) km (b) mAh (c) kg (d) °C
  30. 30.🔋 A robot uses 25% of its battery every 1 minute. How many minutes does a full battery (100%) last?
  31. 31.🔋 A robot’s battery is at 40%. Each lap of the track uses 10%. How many laps can it do before the battery reaches 0%?
  32. 32.🔋 A robot’s battery holds 1200 mAh and the robot uses 400 mA. For how many hours can it run?
  33. 33.🔋 A robot’s battery is at 85% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  34. 34.🔋 What powers most moving robots? (a) a rechargeable battery (b) a candle (c) a water tank (d) a tiny magnet
  35. 35.🔋 A robot’s battery is at 70% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  36. 36.🔋 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%?
  37. 37.🔋 A robot runs on 2 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  38. 38.🔋 What should you do with a swollen or damaged robot battery? (a) squeeze it flat (b) give it to an adult (c) charge it again (d) throw it in a fire
  39. 39.🔋 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%?
  40. 40.🔋 A robot’s battery holds 2000 mAh and the robot uses 400 mA. For how many hours can it run?

Answer key

  1. 60
  2. a power cable
  3. 30
  4. 30
  5. 10
  6. 4
  7. goes back to its dock
  8. 1
  9. 3
  10. 4.5
  11. 2
  12. 25
  13. 16
  14. 75
  15. 3
  16. 8
  17. 20
  18. 3
  19. 20
  20. 2
  21. 9
  22. sunlight (solar panels)
  23. 4
  24. 6
  25. 50
  26. 2
  27. 5
  28. 6
  29. mAh
  30. 4
  31. 4
  32. 3
  33. 30
  34. a rechargeable battery
  35. 60
  36. 5
  37. 3
  38. give it to an adult
  39. 2
  40. 5

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