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Robotics Worksheet: Robot Batteries

Robotics lesson 4: Power for robots · Set 87 · 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 4% of its battery every 1 minute. How many minutes does a full battery (100%) last?
  2. 2.🔋 A robot’s battery holds 3200 mAh and the robot uses 400 mA. For how many hours can it run?
  3. 3.🔋 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
  4. 4.🔋 Battery capacity (how much it holds) is often written in … (a) mAh (b) km (c) kg (d) °C
  5. 5.🔋 A robot’s battery is at 10% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  6. 6.🔋 A robot’s battery holds 300 mAh and the robot uses 100 mA. For how many hours can it run?
  7. 7.🔋 A robot’s battery holds 750 mAh and the robot uses 250 mA. For how many hours can it run?
  8. 8.🔋 A robot’s battery is at 50% and charging adds 10% every 10 minutes. How many minutes until it is full (100%)?
  9. 9.🔋 A robot uses 4% of its battery every 5 minutes. How many minutes does a full battery (100%) last?
  10. 10.🔋 A robot’s battery holds 200 mAh and the robot uses 200 mA. For how many hours can it run?
  11. 11.🔋 A robot uses 2% of its battery every 6 minutes. How many minutes does a full battery (100%) last?
  12. 12.🔋 A robot arm bolted to a factory floor usually gets its power from … (a) a wind-up key (b) a coin cell (c) a solar panel (d) a power cable
  13. 13.🔋 A robot runs on 8 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  14. 14.🔋 A robot’s battery is at 15%. Each lap of the track uses 5%. How many laps can it do before the battery reaches 0%?
  15. 15.🔋 A robot’s battery holds 500 mAh and the robot uses 250 mA. For how many hours can it run?
  16. 16.🔋 A robot’s battery holds 7000 mAh and the robot uses 1000 mA. For how many hours can it run?
  17. 17.🔋 Many robots on far-away planets get energy from … (a) petrol pumps (b) wind-up keys (c) sunlight (solar panels) (d) shop batteries
  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.🔋 What powers most moving robots? (a) a candle (b) a tiny magnet (c) a rechargeable battery (d) a water tank
  20. 20.🔋 A robot’s battery is at 50% and charging adds 25% every 10 minutes. How many minutes until it is full (100%)?
  21. 21.🔋 A robot runs on 5 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  22. 22.🔋 A robot uses 10% of its battery every 4 minutes. How many minutes does a full battery (100%) last?
  23. 23.🔋 A robot’s battery holds 400 mAh and the robot uses 400 mA. For how many hours can it run?
  24. 24.🔋 A robot’s battery is at 15% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  25. 25.🔋 A robot’s battery is at 0% and charging adds 25% every 10 minutes. How many minutes until it is full (100%)?
  26. 26.🔋 A robot uses 4% of its battery every 2 minutes. How many minutes does a full battery (100%) last?
  27. 27.🔋 A robot runs on 3 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  28. 28.🔋 A robot’s battery holds 2000 mAh and the robot uses 250 mA. For how many hours can it run?
  29. 29.🔋 A robot uses 20% of its battery every 4 minutes. How many minutes does a full battery (100%) last?
  30. 30.🔋 A robot uses 25% of its battery every 2 minutes. How many minutes does a full battery (100%) last?
  31. 31.🔋 A robot runs on 4 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  32. 32.🔋 A robot’s battery holds 1600 mAh and the robot uses 200 mA. For how many hours can it run?
  33. 33.🔋 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%?
  34. 34.🔋 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%?
  35. 35.🔋 A robot’s battery holds 3000 mAh and the robot uses 1000 mA. For how many hours can it run?
  36. 36.🔋 A robot’s battery holds 700 mAh and the robot uses 100 mA. For how many hours can it run?
  37. 37.🔋 A robot’s battery is at 10% and charging adds 10% every 10 minutes. How many minutes until it is full (100%)?
  38. 38.🔋 A robot’s battery holds 1750 mAh and the robot uses 250 mA. For how many hours can it run?
  39. 39.🔋 A robot uses 10% of its battery every 1 minute. How many minutes does a full battery (100%) last?
  40. 40.🔋 A robot uses 2% of its battery every 5 minutes. How many minutes does a full battery (100%) last?

Answer key

  1. 25
  2. 8
  3. give it to an adult
  4. mAh
  5. 180
  6. 3
  7. 3
  8. 50
  9. 125
  10. 1
  11. 300
  12. a power cable
  13. 12
  14. 3
  15. 2
  16. 7
  17. sunlight (solar panels)
  18. 10
  19. a rechargeable battery
  20. 20
  21. 7.5
  22. 40
  23. 1
  24. 170
  25. 40
  26. 50
  27. 4.5
  28. 8
  29. 20
  30. 8
  31. 6
  32. 8
  33. 8
  34. 3
  35. 3
  36. 7
  37. 90
  38. 7
  39. 10
  40. 250

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