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Robotics Worksheet: Robot Batteries

Robotics lesson 4: Power for robots · Set 285 · 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 uses 5% of its battery every 1 minute. How many minutes does a full battery (100%) last?
  3. 3.🔋 Battery capacity (how much it holds) is often written in … (a) mAh (b) kg (c) km (d) °C
  4. 4.🔋 Many robots on far-away planets get energy from … (a) petrol pumps (b) shop batteries (c) sunlight (solar panels) (d) wind-up keys
  5. 5.🔋 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%?
  6. 6.🔋 A robot’s battery holds 300 mAh and the robot uses 100 mA. For how many hours can it run?
  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’s battery is at 90% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  9. 9.🔋 A robot’s battery is at 50% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  10. 10.🔋 A robot runs on 5 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  11. 11.🔋 A robot runs on 7 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  12. 12.🔋 A robot’s battery holds 1250 mAh and the robot uses 250 mA. For how many hours can it run?
  13. 13.🔋 A robot runs on 8 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  14. 14.🔋 A robot runs on 3 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  15. 15.🔋 A robot’s battery holds 2000 mAh and the robot uses 1000 mA. For how many hours can it run?
  16. 16.🔋 A robot uses 25% of its battery every 3 minutes. How many minutes does a full battery (100%) last?
  17. 17.🔋 A robot’s battery is at 70% and charging adds 10% every 10 minutes. How many minutes until it is full (100%)?
  18. 18.🔋 A robot runs on 2 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  19. 19.🔋 A robot’s battery is at 25% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  20. 20.🔋 A robot uses 20% of its battery every 5 minutes. How many minutes does a full battery (100%) last?
  21. 21.🔋 A robot’s battery holds 400 mAh and the robot uses 400 mA. For how many hours can it run?
  22. 22.🔋 What does a robot vacuum do when its battery is low? (a) turns into a car (b) goes back to its dock (c) keeps going for ever (d) explodes
  23. 23.🔋 A robot’s battery is at 75%. Each lap of the track uses 5%. How many laps can it do before the battery reaches 0%?
  24. 24.🔋 A robot’s battery holds 200 mAh and the robot uses 100 mA. For how many hours can it run?
  25. 25.🔋 A robot uses 4% of its battery every 3 minutes. How many minutes does a full battery (100%) last?
  26. 26.🔋 A robot’s battery is at 35%. Each lap of the track uses 5%. How many laps can it do before the battery reaches 0%?
  27. 27.🔋 A robot’s battery holds 7000 mAh and the robot uses 1000 mA. For how many hours can it run?
  28. 28.🔋 A robot’s battery holds 2400 mAh and the robot uses 400 mA. For how many hours can it run?
  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 is at 20% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  31. 31.🔋 What should you do with a swollen or damaged robot battery? (a) throw it in a fire (b) give it to an adult (c) squeeze it flat (d) charge it again
  32. 32.🔋 A robot uses 5% of its battery every 5 minutes. How many minutes does a full battery (100%) last?
  33. 33.🔋 A robot’s battery is at 25% and charging adds 25% every 10 minutes. How many minutes until it is full (100%)?
  34. 34.🔋 A robot arm bolted to a factory floor usually gets its power from … (a) a solar panel (b) a power cable (c) a coin cell (d) a wind-up key
  35. 35.🔋 A robot’s battery holds 600 mAh and the robot uses 200 mA. For how many hours can it run?
  36. 36.🔋 A robot’s battery holds 600 mAh and the robot uses 100 mA. For how many hours can it run?
  37. 37.🔋 A robot uses 25% of its battery every 4 minutes. How many minutes does a full battery (100%) last?
  38. 38.🔋 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%?
  39. 39.🔋 What powers most moving robots? (a) a rechargeable battery (b) a tiny magnet (c) a water tank (d) a candle
  40. 40.🔋 A robot’s battery holds 2500 mAh and the robot uses 500 mA. For how many hours can it run?

Answer key

  1. 300
  2. 20
  3. mAh
  4. sunlight (solar panels)
  5. 4
  6. 3
  7. 110
  8. 20
  9. 100
  10. 7.5
  11. 10.5
  12. 5
  13. 12
  14. 4.5
  15. 2
  16. 12
  17. 30
  18. 3
  19. 150
  20. 25
  21. 1
  22. goes back to its dock
  23. 15
  24. 2
  25. 75
  26. 7
  27. 7
  28. 6
  29. 4
  30. 160
  31. give it to an adult
  32. 100
  33. 30
  34. a power cable
  35. 3
  36. 6
  37. 16
  38. 5
  39. a rechargeable battery
  40. 5

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