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Robotics Worksheet: Robot Batteries

Robotics lesson 4: Power for robots · Set 215 · 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 200 mAh and the robot uses 100 mA. For how many hours can it run?
  2. 2.🔋 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%?
  3. 3.🔋 A robot uses 4% of its battery every 2 minutes. How many minutes does a full battery (100%) last?
  4. 4.🔋 A robot runs on 7 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  5. 5.🔋 A robot’s battery is at 40% and charging adds 20% every 10 minutes. How many minutes until it is full (100%)?
  6. 6.🔋 What should you do with a swollen or damaged robot battery? (a) squeeze it flat (b) give it to an adult (c) throw it in a fire (d) charge it again
  7. 7.🔋 A robot’s battery is at 45% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  8. 8.🔋 A robot runs on 4 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  9. 9.🔋 A robot uses 25% of its battery every 6 minutes. How many minutes does a full battery (100%) last?
  10. 10.🔋 A robot runs on 8 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  11. 11.🔋 A robot’s battery is at 0% and charging adds 10% every 10 minutes. How many minutes until it is full (100%)?
  12. 12.🔋 What powers most moving robots? (a) a candle (b) a water tank (c) a rechargeable battery (d) a tiny magnet
  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 holds 1000 mAh and the robot uses 250 mA. For how many hours can it run?
  15. 15.🔋 A robot uses 4% of its battery every 1 minute. How many minutes does a full battery (100%) last?
  16. 16.🔋 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%?
  17. 17.🔋 A robot’s battery is at 65% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  18. 18.🔋 A robot’s battery is at 20% and charging adds 20% every 10 minutes. How many minutes until it is full (100%)?
  19. 19.🔋 Many robots on far-away planets get energy from … (a) wind-up keys (b) sunlight (solar panels) (c) petrol pumps (d) shop batteries
  20. 20.🔋 A robot uses 4% of its battery every 6 minutes. How many minutes does a full battery (100%) last?
  21. 21.🔋 A robot’s battery is at 80% and charging adds 10% every 10 minutes. How many minutes until it is full (100%)?
  22. 22.🔋 A robot’s battery holds 1000 mAh and the robot uses 1000 mA. For how many hours can it run?
  23. 23.🔋 A robot’s battery is at 0% and charging adds 20% every 10 minutes. How many minutes until it is full (100%)?
  24. 24.🔋 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%?
  25. 25.🔋 A robot’s battery is at 50% and charging adds 10% every 10 minutes. How many minutes until it is full (100%)?
  26. 26.🔋 A robot’s battery is at 75% and charging adds 25% every 10 minutes. How many minutes until it is full (100%)?
  27. 27.🔋 A robot’s battery holds 8000 mAh and the robot uses 1000 mA. For how many hours can it run?
  28. 28.🔋 What does a robot vacuum do when its battery is low? (a) explodes (b) keeps going for ever (c) goes back to its dock (d) turns into a car
  29. 29.🔋 A robot’s battery holds 2800 mAh and the robot uses 400 mA. For how many hours can it run?
  30. 30.🔋 A robot runs on 3 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  31. 31.🔋 A robot’s battery holds 1600 mAh and the robot uses 400 mA. For how many hours can it run?
  32. 32.🔋 A robot uses 5% of its battery every 3 minutes. How many minutes does a full battery (100%) last?
  33. 33.🔋 A robot uses 20% of its battery every 1 minute. How many minutes does a full battery (100%) last?
  34. 34.🔋 A robot uses 20% of its battery every 4 minutes. How many minutes does a full battery (100%) last?
  35. 35.🔋 A robot’s battery is at 30% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  36. 36.🔋 A robot runs on 6 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  37. 37.🔋 A robot runs on 2 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  38. 38.🔋 A robot’s battery holds 3500 mAh and the robot uses 500 mA. For how many hours can it run?
  39. 39.🔋 A robot’s battery holds 2000 mAh and the robot uses 500 mA. For how many hours can it run?
  40. 40.🔋 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%?

Answer key

  1. 2
  2. 2
  3. 50
  4. 10.5
  5. 30
  6. give it to an adult
  7. 110
  8. 6
  9. 24
  10. 12
  11. 100
  12. a rechargeable battery
  13. 1
  14. 4
  15. 25
  16. 3
  17. 70
  18. 40
  19. sunlight (solar panels)
  20. 150
  21. 20
  22. 1
  23. 50
  24. 5
  25. 50
  26. 10
  27. 8
  28. goes back to its dock
  29. 7
  30. 4.5
  31. 4
  32. 60
  33. 5
  34. 20
  35. 140
  36. 9
  37. 3
  38. 7
  39. 4
  40. 4

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