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Robotics Worksheet: Robot Batteries

Robotics lesson 4: Power for robots · Set 165 · 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 50% and charging adds 25% every 10 minutes. How many minutes until it is full (100%)?
  2. 2.🔋 Battery capacity (how much it holds) is often written in … (a) mAh (b) kg (c) km (d) °C
  3. 3.🔋 A robot’s battery is at 30%. Each lap of the track uses 10%. How many laps can it do before the battery reaches 0%?
  4. 4.🔋 A robot’s battery holds 2000 mAh and the robot uses 400 mA. For how many hours can it run?
  5. 5.🔋 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
  6. 6.🔋 What powers most moving robots? (a) a rechargeable battery (b) a candle (c) a tiny magnet (d) a water tank
  7. 7.🔋 A robot’s battery holds 1200 mAh and the robot uses 200 mA. For how many hours can it run?
  8. 8.🔋 A robot arm bolted to a factory floor usually gets its power from … (a) a solar panel (b) a coin cell (c) a power cable (d) a wind-up key
  9. 9.🔋 A robot uses 25% of its battery every 1 minute. How many minutes does a full battery (100%) last?
  10. 10.🔋 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%?
  11. 11.🔋 A robot’s battery holds 600 mAh and the robot uses 200 mA. For how many hours can it run?
  12. 12.🔋 A robot’s battery is at 40% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  13. 13.🔋 A robot uses 10% of its battery every 1 minute. How many minutes does a full battery (100%) last?
  14. 14.🔋 A robot uses 10% of its battery every 3 minutes. How many minutes does a full battery (100%) last?
  15. 15.🔋 A robot’s battery is at 90% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  16. 16.🔋 A robot runs on 2 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  17. 17.🔋 A robot uses 25% of its battery every 6 minutes. How many minutes does a full battery (100%) last?
  18. 18.🔋 A robot runs on 3 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  19. 19.🔋 A robot uses 5% of its battery every 6 minutes. How many minutes does a full battery (100%) last?
  20. 20.🔋 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%?
  21. 21.🔋 A robot uses 5% of its battery every 5 minutes. How many minutes does a full battery (100%) last?
  22. 22.🔋 A robot’s battery is at 20% and charging adds 20% every 10 minutes. How many minutes until it is full (100%)?
  23. 23.🔋 A robot’s battery holds 100 mAh and the robot uses 100 mA. For how many hours can it run?
  24. 24.🔋 A robot’s battery is at 30% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  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 runs on 7 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  27. 27.🔋 Many robots on far-away planets get energy from … (a) shop batteries (b) petrol pumps (c) sunlight (solar panels) (d) wind-up keys
  28. 28.🔋 A robot’s battery is at 0% and charging adds 20% every 10 minutes. How many minutes until it is full (100%)?
  29. 29.🔋 A robot’s battery is at 80% and charging adds 10% every 10 minutes. How many minutes until it is full (100%)?
  30. 30.🔋 A robot runs on 5 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  31. 31.🔋 A robot’s battery is at 40%. Each lap of the track uses 5%. How many laps can it do before the battery reaches 0%?
  32. 32.🔋 A robot’s battery holds 300 mAh and the robot uses 100 mA. For how many hours can it run?
  33. 33.🔋 A robot uses 5% of its battery every 3 minutes. How many minutes does a full battery (100%) last?
  34. 34.🔋 A robot’s battery holds 2000 mAh and the robot uses 500 mA. For how many hours can it run?
  35. 35.🔋 A robot’s battery is at 85%. 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 500 mAh and the robot uses 500 mA. For how many hours can it run?
  37. 37.🔋 What does a robot vacuum do when its battery is low? (a) explodes (b) keeps going for ever (c) turns into a car (d) goes back to its dock
  38. 38.🔋 A robot’s battery holds 200 mAh and the robot uses 100 mA. For how many hours can it run?
  39. 39.🔋 A robot’s battery is at 50%. Each lap of the track uses 5%. How many laps can it do before the battery reaches 0%?
  40. 40.🔋 A robot’s battery holds 1400 mAh and the robot uses 200 mA. For how many hours can it run?

Answer key

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

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