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Robotics Worksheet: Robot Batteries

Robotics lesson 4: Power for robots · Set 46 · 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 5% of its battery every 1 minute. How many minutes does a full battery (100%) last?
  2. 2.🔋 A robot’s battery holds 1200 mAh and the robot uses 200 mA. For how many hours can it run?
  3. 3.🔋 Many robots on far-away planets get energy from … (a) shop batteries (b) petrol pumps (c) wind-up keys (d) sunlight (solar panels)
  4. 4.🔋 A robot’s battery holds 750 mAh and the robot uses 250 mA. For how many hours can it run?
  5. 5.🔋 Battery capacity (how much it holds) is often written in … (a) kg (b) mAh (c) °C (d) km
  6. 6.🔋 A robot arm bolted to a factory floor usually gets its power from … (a) a wind-up key (b) a solar panel (c) a coin cell (d) a power cable
  7. 7.🔋 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
  8. 8.🔋 A robot’s battery is at 25%. Each lap of the track uses 5%. How many laps can it do before the battery reaches 0%?
  9. 9.🔋 A robot’s battery holds 800 mAh and the robot uses 100 mA. For how many hours can it run?
  10. 10.🔋 A robot’s battery holds 2000 mAh and the robot uses 400 mA. For how many hours can it run?
  11. 11.🔋 A robot’s battery is at 95% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  12. 12.🔋 A robot uses 5% of its battery every 4 minutes. How many minutes does a full battery (100%) last?
  13. 13.🔋 What powers most moving robots? (a) a rechargeable battery (b) a candle (c) a water tank (d) a tiny magnet
  14. 14.🔋 A robot’s battery holds 1000 mAh and the robot uses 500 mA. For how many hours can it run?
  15. 15.🔋 A robot runs on 8 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  16. 16.🔋 A robot’s battery holds 700 mAh and the robot uses 100 mA. For how many hours can it run?
  17. 17.🔋 A robot’s battery holds 800 mAh and the robot uses 400 mA. For how many hours can it run?
  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 75%. Each lap of the track uses 25%. How many laps can it do before the battery reaches 0%?
  20. 20.🔋 A robot uses 10% of its battery every 6 minutes. How many minutes does a full battery (100%) last?
  21. 21.🔋 A robot’s battery is at 50% and charging adds 25% every 10 minutes. How many minutes until it is full (100%)?
  22. 22.🔋 A robot’s battery is at 10% and charging adds 10% every 10 minutes. How many minutes until it is full (100%)?
  23. 23.🔋 A robot’s battery holds 400 mAh and the robot uses 200 mA. For how many hours can it run?
  24. 24.🔋 A robot uses 4% of its battery every 6 minutes. How many minutes does a full battery (100%) last?
  25. 25.🔋 A robot runs on 7 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  26. 26.🔋 A robot’s battery is at 50%. Each lap of the track uses 10%. How many laps can it do before the battery reaches 0%?
  27. 27.🔋 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%?
  28. 28.🔋 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%?
  29. 29.🔋 A robot runs on 3 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  30. 30.🔋 A robot’s battery holds 400 mAh and the robot uses 100 mA. For how many hours can it run?
  31. 31.🔋 A robot’s battery is at 40% and charging adds 10% every 10 minutes. How many minutes until it is full (100%)?
  32. 32.🔋 A robot runs on 2 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  33. 33.🔋 A robot’s battery holds 2000 mAh and the robot uses 500 mA. For how many hours can it run?
  34. 34.🔋 A robot’s battery is at 10% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  35. 35.🔋 A robot’s battery holds 1250 mAh and the robot uses 250 mA. For how many hours can it run?
  36. 36.🔋 A robot’s battery holds 2000 mAh and the robot uses 1000 mA. For how many hours can it run?
  37. 37.🔋 A robot’s battery holds 3200 mAh and the robot uses 400 mA. For how many hours can it run?
  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 holds 2800 mAh and the robot uses 400 mA. For how many hours can it run?
  40. 40.🔋 A robot’s battery is at 45% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?

Answer key

  1. 20
  2. 6
  3. sunlight (solar panels)
  4. 3
  5. mAh
  6. a power cable
  7. give it to an adult
  8. 5
  9. 8
  10. 5
  11. 10
  12. 80
  13. a rechargeable battery
  14. 2
  15. 12
  16. 7
  17. 2
  18. 10
  19. 3
  20. 60
  21. 20
  22. 90
  23. 2
  24. 150
  25. 10.5
  26. 5
  27. 3
  28. 4
  29. 4.5
  30. 4
  31. 60
  32. 3
  33. 4
  34. 180
  35. 5
  36. 2
  37. 8
  38. 6
  39. 7
  40. 110

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