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Robotics Worksheet: Robot Batteries

Robotics lesson 4: Power for robots · Set 889 · 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 is at 25% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  2. 2.🔋 A robot uses 4% of its battery every 6 minutes. How many minutes does a full battery (100%) last?
  3. 3.🔋 Many robots on far-away planets get energy from … (a) shop batteries (b) wind-up keys (c) petrol pumps (d) sunlight (solar panels)
  4. 4.🔋 A robot’s battery is at 10% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  5. 5.🔋 A robot uses 5% of its battery every 6 minutes. How many minutes does a full battery (100%) last?
  6. 6.🔋 A robot’s battery is at 80%. Each lap of the track uses 5%. How many laps can it do before the battery reaches 0%?
  7. 7.🔋 A robot uses 10% of its battery every 5 minutes. How many minutes does a full battery (100%) last?
  8. 8.🔋 A robot runs on 3 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  9. 9.🔋 A robot’s battery is at 40% and charging adds 20% every 10 minutes. How many minutes until it is full (100%)?
  10. 10.🔋 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%?
  11. 11.🔋 A robot uses 2% of its battery every 2 minutes. How many minutes does a full battery (100%) last?
  12. 12.🔋 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%?
  13. 13.🔋 A robot’s battery is at 50%. Each lap of the track uses 25%. How many laps can it do before the battery reaches 0%?
  14. 14.🔋 A robot’s battery is at 40% and charging adds 10% every 10 minutes. How many minutes until it is full (100%)?
  15. 15.🔋 A robot’s battery is at 20%. Each lap of the track uses 5%. How many laps can it do before the battery reaches 0%?
  16. 16.🔋 A robot’s battery is at 30% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  17. 17.🔋 A robot’s battery holds 2400 mAh and the robot uses 400 mA. For how many hours can it run?
  18. 18.🔋 A robot’s battery is at 95%. Each lap of the track uses 5%. How many laps can it do before the battery reaches 0%?
  19. 19.🔋 What should you do with a swollen or damaged robot battery? (a) throw it in a fire (b) give it to an adult (c) charge it again (d) squeeze it flat
  20. 20.🔋 A robot runs on 7 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  21. 21.🔋 A robot runs on 5 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  22. 22.🔋 What powers most moving robots? (a) a tiny magnet (b) a candle (c) a water tank (d) a rechargeable battery
  23. 23.🔋 A robot runs on 6 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  24. 24.🔋 A robot’s battery holds 800 mAh and the robot uses 200 mA. For how many hours can it run?
  25. 25.🔋 A robot’s battery holds 1250 mAh and the robot uses 250 mA. For how many hours can it run?
  26. 26.🔋 A robot’s battery is at 0% and charging adds 20% every 10 minutes. How many minutes until it is full (100%)?
  27. 27.🔋 A robot’s battery holds 300 mAh and the robot uses 100 mA. For how many hours can it run?
  28. 28.🔋 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
  29. 29.🔋 A robot uses 4% of its battery every 1 minute. How many minutes does a full battery (100%) last?
  30. 30.🔋 Battery capacity (how much it holds) is often written in … (a) kg (b) mAh (c) km (d) °C
  31. 31.🔋 A robot uses 25% of its battery every 6 minutes. How many minutes does a full battery (100%) last?
  32. 32.🔋 A robot’s battery holds 100 mAh and the robot uses 100 mA. For how many hours can it run?
  33. 33.🔋 A robot’s battery holds 200 mAh and the robot uses 100 mA. For how many hours can it run?
  34. 34.🔋 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%?
  35. 35.🔋 A robot’s battery is at 75% and charging adds 25% every 10 minutes. How many minutes until it is full (100%)?
  36. 36.🔋 A robot’s battery is at 75% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  37. 37.🔋 A robot’s battery is at 10%. Each lap of the track uses 5%. How many laps can it do before the battery reaches 0%?
  38. 38.🔋 A robot’s battery holds 1000 mAh and the robot uses 200 mA. For how many hours can it run?
  39. 39.🔋 A robot’s battery is at 100%. Each lap of the track uses 10%. How many laps can it do before the battery reaches 0%?
  40. 40.🔋 A robot’s battery holds 3500 mAh and the robot uses 500 mA. For how many hours can it run?

Answer key

  1. 150
  2. 150
  3. sunlight (solar panels)
  4. 180
  5. 120
  6. 16
  7. 50
  8. 4.5
  9. 30
  10. 3
  11. 100
  12. 5
  13. 2
  14. 60
  15. 4
  16. 140
  17. 6
  18. 19
  19. give it to an adult
  20. 10.5
  21. 7.5
  22. a rechargeable battery
  23. 9
  24. 4
  25. 5
  26. 50
  27. 3
  28. goes back to its dock
  29. 25
  30. mAh
  31. 24
  32. 1
  33. 2
  34. 2
  35. 10
  36. 50
  37. 2
  38. 5
  39. 10
  40. 7

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