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Robotics Worksheet: Robot Batteries

Robotics lesson 4: Power for robots · Set 420 · 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 1200 mAh and the robot uses 400 mA. For how many hours can it run?
  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 4% of its battery every 4 minutes. How many minutes does a full battery (100%) last?
  4. 4.🔋 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%?
  5. 5.🔋 A robot runs on 8 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  6. 6.🔋 A robot’s battery holds 4000 mAh and the robot uses 1000 mA. For how many hours can it run?
  7. 7.🔋 What powers most moving robots? (a) a water tank (b) a candle (c) a rechargeable battery (d) a tiny magnet
  8. 8.🔋 A robot uses 2% of its battery every 6 minutes. How many minutes does a full battery (100%) last?
  9. 9.🔋 A robot runs on 3 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  10. 10.🔋 A robot’s battery is at 50% and charging adds 10% every 10 minutes. How many minutes until it is full (100%)?
  11. 11.🔋 A robot’s battery holds 1000 mAh and the robot uses 500 mA. For how many hours can it run?
  12. 12.🔋 A robot’s battery is at 40% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  13. 13.🔋 A robot’s battery holds 600 mAh and the robot uses 100 mA. For how many hours can it run?
  14. 14.🔋 A robot’s battery holds 1400 mAh and the robot uses 200 mA. For how many hours can it run?
  15. 15.🔋 A robot uses 20% of its battery every 5 minutes. How many minutes does a full battery (100%) last?
  16. 16.🔋 A robot runs on 7 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) charge it again (b) give it to an adult (c) squeeze it flat (d) throw it in a fire
  18. 18.🔋 A robot’s battery is at 75% and charging adds 25% every 10 minutes. How many minutes until it is full (100%)?
  19. 19.🔋 A robot’s battery is at 70% and charging adds 10% every 10 minutes. How many minutes until it is full (100%)?
  20. 20.🔋 A robot’s battery is at 90% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  21. 21.🔋 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%?
  22. 22.🔋 A robot runs on 5 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  23. 23.🔋 A robot’s battery holds 500 mAh and the robot uses 100 mA. For how many hours can it run?
  24. 24.🔋 A robot arm bolted to a factory floor usually gets its power from … (a) a wind-up key (b) a power cable (c) a coin cell (d) a solar panel
  25. 25.🔋 A robot’s battery holds 2000 mAh and the robot uses 400 mA. For how many hours can it run?
  26. 26.🔋 A robot’s battery is at 60% and charging adds 10% every 10 minutes. How many minutes until it is full (100%)?
  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.🔋 A robot uses 10% of its battery every 1 minute. How many minutes does a full battery (100%) last?
  29. 29.🔋 A robot’s battery holds 1000 mAh and the robot uses 200 mA. For how many hours can it run?
  30. 30.🔋 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%?
  31. 31.🔋 A robot’s battery holds 2500 mAh and the robot uses 500 mA. For how many hours can it run?
  32. 32.🔋 A robot uses 4% of its battery every 6 minutes. How many minutes does a full battery (100%) last?
  33. 33.🔋 A robot’s battery is at 80% and charging adds 10% every 10 minutes. How many minutes until it is full (100%)?
  34. 34.🔋 A robot’s battery is at 90% and charging adds 10% every 10 minutes. How many minutes until it is full (100%)?
  35. 35.🔋 A robot uses 2% of its battery every 1 minute. How many minutes does a full battery (100%) last?
  36. 36.🔋 A robot’s battery is at 70%. Each lap of the track uses 10%. How many laps can it do before the battery reaches 0%?
  37. 37.🔋 A robot’s battery is at 50% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  38. 38.🔋 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%?
  39. 39.🔋 A robot uses 5% of its battery every 1 minute. How many minutes does a full battery (100%) last?
  40. 40.🔋 A robot’s battery is at 45%. Each lap of the track uses 5%. How many laps can it do before the battery reaches 0%?

Answer key

  1. 3
  2. mAh
  3. 100
  4. 8
  5. 12
  6. 4
  7. a rechargeable battery
  8. 300
  9. 4.5
  10. 50
  11. 2
  12. 120
  13. 6
  14. 7
  15. 25
  16. 10.5
  17. give it to an adult
  18. 10
  19. 30
  20. 20
  21. 2
  22. 7.5
  23. 5
  24. a power cable
  25. 5
  26. 40
  27. 2
  28. 10
  29. 5
  30. 4
  31. 5
  32. 150
  33. 20
  34. 10
  35. 50
  36. 7
  37. 100
  38. 3
  39. 20
  40. 9

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