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Robotics Worksheet: Robot Batteries

Robotics lesson 4: Power for robots · Set 30 · 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 2% of its battery every 6 minutes. How many minutes does a full battery (100%) last?
  2. 2.🔋 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%?
  3. 3.🔋 A robot’s battery is at 80% and charging adds 10% every 10 minutes. How many minutes until it is full (100%)?
  4. 4.🔋 A robot’s battery is at 65% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  5. 5.🔋 A robot’s battery is at 10% and charging adds 10% every 10 minutes. How many minutes until it is full (100%)?
  6. 6.🔋 A robot uses 5% of its battery every 6 minutes. How many minutes does a full battery (100%) last?
  7. 7.🔋 A robot’s battery holds 1000 mAh and the robot uses 1000 mA. For how many hours can it run?
  8. 8.🔋 A robot runs on 2 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  9. 9.🔋 A robot’s battery holds 1600 mAh and the robot uses 400 mA. For how many hours can it run?
  10. 10.🔋 What does a robot vacuum do when its battery is low? (a) turns into a car (b) keeps going for ever (c) goes back to its dock (d) explodes
  11. 11.🔋 A robot runs on 3 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  12. 12.🔋 Battery capacity (how much it holds) is often written in … (a) kg (b) km (c) °C (d) mAh
  13. 13.🔋 A robot uses 4% of its battery every 6 minutes. How many minutes does a full battery (100%) last?
  14. 14.🔋 A robot’s battery holds 5000 mAh and the robot uses 1000 mA. For how many hours can it run?
  15. 15.🔋 A robot’s battery holds 1200 mAh and the robot uses 200 mA. For how many hours can it run?
  16. 16.🔋 A robot’s battery is at 20% and charging adds 10% every 10 minutes. How many minutes until it is full (100%)?
  17. 17.🔋 A robot uses 25% of its battery every 1 minute. How many minutes does a full battery (100%) last?
  18. 18.🔋 A robot uses 25% of its battery every 3 minutes. How many minutes does a full battery (100%) last?
  19. 19.🔋 A robot’s battery is at 45% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  20. 20.🔋 A robot uses 5% of its battery every 2 minutes. How many minutes does a full battery (100%) last?
  21. 21.🔋 A robot’s battery is at 90% and charging adds 10% every 10 minutes. How many minutes until it is full (100%)?
  22. 22.🔋 A robot’s battery holds 3500 mAh and the robot uses 500 mA. For how many hours can it run?
  23. 23.🔋 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%?
  24. 24.🔋 A robot runs on 4 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  25. 25.🔋 A robot’s battery holds 4000 mAh and the robot uses 500 mA. For how many hours can it run?
  26. 26.🔋 Many robots on far-away planets get energy from … (a) shop batteries (b) petrol pumps (c) sunlight (solar panels) (d) wind-up keys
  27. 27.🔋 What should you do with a swollen or damaged robot battery? (a) squeeze it flat (b) charge it again (c) give it to an adult (d) throw it in a fire
  28. 28.🔋 A robot uses 20% of its battery every 2 minutes. How many minutes does a full battery (100%) last?
  29. 29.🔋 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%?
  30. 30.🔋 A robot’s battery holds 750 mAh and the robot uses 250 mA. For how many hours can it run?
  31. 31.🔋 A robot runs on 5 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  32. 32.🔋 A robot’s battery is at 50% and charging adds 25% every 10 minutes. How many minutes until it is full (100%)?
  33. 33.🔋 A robot’s battery is at 70% and charging adds 10% every 10 minutes. How many minutes until it is full (100%)?
  34. 34.🔋 A robot’s battery is at 60%. Each lap of the track uses 5%. How many laps can it do before the battery reaches 0%?
  35. 35.🔋 A robot’s battery holds 500 mAh and the robot uses 250 mA. For how many hours can it run?
  36. 36.🔋 A robot’s battery holds 2500 mAh and the robot uses 500 mA. For how many hours can it run?
  37. 37.🔋 A robot’s battery holds 1500 mAh and the robot uses 500 mA. For how many hours can it run?
  38. 38.🔋 A robot uses 20% of its battery every 5 minutes. How many minutes does a full battery (100%) last?
  39. 39.🔋 A robot uses 10% of its battery every 6 minutes. How many minutes does a full battery (100%) last?
  40. 40.🔋 A robot runs on 6 cells of 1.5 V joined in series. What is the total voltage (in volts)? =

Answer key

  1. 300
  2. 3
  3. 20
  4. 70
  5. 90
  6. 120
  7. 1
  8. 3
  9. 4
  10. goes back to its dock
  11. 4.5
  12. mAh
  13. 150
  14. 5
  15. 6
  16. 80
  17. 4
  18. 12
  19. 110
  20. 40
  21. 10
  22. 7
  23. 5
  24. 6
  25. 8
  26. sunlight (solar panels)
  27. give it to an adult
  28. 10
  29. 4
  30. 3
  31. 7.5
  32. 20
  33. 30
  34. 12
  35. 2
  36. 5
  37. 3
  38. 25
  39. 60
  40. 9

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