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Robotics Worksheet: Robot Batteries

Robotics lesson 4: Power for robots · Set 448 · 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 holds 100 mAh and the robot uses 100 mA. For how many hours can it run?
  2. 2.🔋 A robot’s battery is at 75% and charging adds 25% every 10 minutes. How many minutes until it is full (100%)?
  3. 3.🔋 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%?
  4. 4.🔋 A robot’s battery holds 1000 mAh and the robot uses 250 mA. For how many hours can it run?
  5. 5.🔋 A robot’s battery is at 65% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  6. 6.🔋 A robot’s battery holds 2800 mAh and the robot uses 400 mA. For how many hours can it run?
  7. 7.🔋 A robot’s battery holds 1600 mAh and the robot uses 400 mA. For how many hours can it run?
  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 holds 3000 mAh and the robot uses 500 mA. For how many hours can it run?
  10. 10.🔋 A robot runs on 4 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  11. 11.🔋 Many robots on far-away planets get energy from … (a) wind-up keys (b) shop batteries (c) petrol pumps (d) sunlight (solar panels)
  12. 12.🔋 A robot uses 2% of its battery every 4 minutes. How many minutes does a full battery (100%) last?
  13. 13.🔋 A robot’s battery holds 400 mAh and the robot uses 400 mA. For how many hours can it run?
  14. 14.🔋 A robot’s battery is at 50% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  15. 15.🔋 A robot uses 25% of its battery every 4 minutes. How many minutes does a full battery (100%) last?
  16. 16.🔋 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%?
  17. 17.🔋 A robot uses 2% of its battery every 6 minutes. How many minutes does a full battery (100%) last?
  18. 18.🔋 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%?
  19. 19.🔋 A robot’s battery is at 20% and charging adds 20% every 10 minutes. How many minutes until it is full (100%)?
  20. 20.🔋 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
  21. 21.🔋 A robot’s battery is at 15% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  22. 22.🔋 A robot runs on 7 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  23. 23.🔋 A robot’s battery holds 600 mAh and the robot uses 200 mA. For how many hours can it run?
  24. 24.🔋 A robot runs on 2 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  25. 25.🔋 A robot uses 25% of its battery every 5 minutes. How many minutes does a full battery (100%) last?
  26. 26.🔋 What powers most moving robots? (a) a tiny magnet (b) a candle (c) a water tank (d) a rechargeable battery
  27. 27.🔋 A robot’s battery is at 10%. Each lap of the track uses 5%. How many laps can it do before the battery reaches 0%?
  28. 28.🔋 A robot’s battery holds 600 mAh and the robot uses 100 mA. For how many hours can it run?
  29. 29.🔋 A robot’s battery is at 0% and charging adds 25% every 10 minutes. How many minutes until it is full (100%)?
  30. 30.🔋 A robot’s battery is at 50% and charging adds 25% every 10 minutes. How many minutes until it is full (100%)?
  31. 31.🔋 A robot’s battery holds 1000 mAh and the robot uses 1000 mA. For how many hours can it run?
  32. 32.🔋 A robot’s battery is at 0% and charging adds 20% every 10 minutes. How many minutes until it is full (100%)?
  33. 33.🔋 A robot uses 2% of its battery every 3 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’s battery is at 60% and charging adds 20% every 10 minutes. How many minutes until it is full (100%)?
  36. 36.🔋 A robot’s battery is at 60% and charging adds 10% every 10 minutes. How many minutes until it is full (100%)?
  37. 37.🔋 A robot’s battery is at 0% and charging adds 10% every 10 minutes. How many minutes until it is full (100%)?
  38. 38.🔋 A robot uses 25% of its battery every 1 minute. How many minutes does a full battery (100%) last?
  39. 39.🔋 A robot arm bolted to a factory floor usually gets its power from … (a) a coin cell (b) a wind-up key (c) a solar panel (d) a power cable
  40. 40.🔋 A robot uses 10% of its battery every 5 minutes. How many minutes does a full battery (100%) last?

Answer key

  1. 1
  2. 10
  3. 3
  4. 4
  5. 70
  6. 7
  7. 4
  8. 3
  9. 6
  10. 6
  11. sunlight (solar panels)
  12. 200
  13. 1
  14. 100
  15. 16
  16. 4
  17. 300
  18. 5
  19. 40
  20. give it to an adult
  21. 170
  22. 10.5
  23. 3
  24. 3
  25. 20
  26. a rechargeable battery
  27. 2
  28. 6
  29. 40
  30. 20
  31. 1
  32. 50
  33. 150
  34. 18
  35. 20
  36. 40
  37. 100
  38. 4
  39. a power cable
  40. 50

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