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Robotics Worksheet: Robot Batteries

Robotics lesson 4: Power for robots · Set 152 · 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.🔋 What does a robot vacuum do when its battery is low? (a) explodes (b) goes back to its dock (c) turns into a car (d) keeps going for ever
  2. 2.🔋 A robot’s battery is at 15% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  3. 3.🔋 A robot uses 4% of its battery every 3 minutes. How many minutes does a full battery (100%) last?
  4. 4.🔋 A robot’s battery holds 200 mAh and the robot uses 100 mA. For how many hours can it run?
  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 250 mAh and the robot uses 250 mA. For how many hours can it run?
  7. 7.🔋 A robot’s battery holds 300 mAh and the robot uses 100 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 2000 mAh and the robot uses 1000 mA. For how many hours can it run?
  10. 10.🔋 What powers most moving robots? (a) a candle (b) a tiny magnet (c) a rechargeable battery (d) a water tank
  11. 11.🔋 Many robots on far-away planets get energy from … (a) wind-up keys (b) petrol pumps (c) shop batteries (d) sunlight (solar panels)
  12. 12.🔋 A robot’s battery is at 20% and charging adds 20% every 10 minutes. How many minutes until it is full (100%)?
  13. 13.🔋 A robot runs on 5 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  14. 14.🔋 A robot uses 20% of its battery every 1 minute. How many minutes does a full battery (100%) last?
  15. 15.🔋 A robot’s battery is at 90%. Each lap of the track uses 10%. How many laps can it do before the battery reaches 0%?
  16. 16.🔋 A robot uses 20% of its battery every 4 minutes. How many minutes does a full battery (100%) last?
  17. 17.🔋 A robot uses 20% of its battery every 3 minutes. How many minutes does a full battery (100%) last?
  18. 18.🔋 What should you do with a swollen or damaged robot battery? (a) throw it in a fire (b) charge it again (c) give it to an adult (d) squeeze it flat
  19. 19.🔋 A robot runs on 4 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  20. 20.🔋 A robot uses 4% of its battery every 1 minute. How many minutes does a full battery (100%) last?
  21. 21.🔋 A robot’s battery is at 60% and charging adds 20% every 10 minutes. How many minutes until it is full (100%)?
  22. 22.🔋 A robot’s battery is at 10% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  23. 23.🔋 A robot uses 2% of its battery every 3 minutes. How many minutes does a full battery (100%) last?
  24. 24.🔋 A robot uses 5% of its battery every 2 minutes. How many minutes does a full battery (100%) last?
  25. 25.🔋 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%?
  26. 26.🔋 A robot’s battery holds 200 mAh and the robot uses 200 mA. For how many hours can it run?
  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 1200 mAh and the robot uses 200 mA. For how many hours can it run?
  29. 29.🔋 Battery capacity (how much it holds) is often written in … (a) kg (b) °C (c) mAh (d) km
  30. 30.🔋 A robot runs on 6 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  31. 31.🔋 A robot’s battery holds 4000 mAh and the robot uses 1000 mA. For how many hours can it run?
  32. 32.🔋 A robot’s battery is at 30% and charging adds 10% every 10 minutes. How many minutes until it is full (100%)?
  33. 33.🔋 A robot uses 5% of its battery every 5 minutes. How many minutes does a full battery (100%) last?
  34. 34.🔋 A robot’s battery holds 600 mAh and the robot uses 100 mA. For how many hours can it run?
  35. 35.🔋 A robot’s battery is at 55%. Each lap of the track uses 5%. How many laps can it do before the battery reaches 0%?
  36. 36.🔋 A robot’s battery holds 2000 mAh and the robot uses 400 mA. For how many hours can it run?
  37. 37.🔋 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%?
  38. 38.🔋 A robot’s battery holds 400 mAh and the robot uses 200 mA. For how many hours can it run?
  39. 39.🔋 A robot’s battery is at 35% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  40. 40.🔋 A robot’s battery holds 2000 mAh and the robot uses 250 mA. For how many hours can it run?

Answer key

  1. goes back to its dock
  2. 170
  3. 75
  4. 2
  5. 12
  6. 1
  7. 3
  8. 3
  9. 2
  10. a rechargeable battery
  11. sunlight (solar panels)
  12. 40
  13. 7.5
  14. 5
  15. 9
  16. 20
  17. 15
  18. give it to an adult
  19. 6
  20. 25
  21. 20
  22. 180
  23. 150
  24. 40
  25. 4
  26. 1
  27. 4.5
  28. 6
  29. mAh
  30. 9
  31. 4
  32. 70
  33. 100
  34. 6
  35. 11
  36. 5
  37. 3
  38. 2
  39. 130
  40. 8

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