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Robotics Worksheet: Robot Batteries

Robotics lesson 4: Power for robots · Set 85 · 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 0% and charging adds 20% every 10 minutes. How many minutes until it is full (100%)?
  2. 2.🔋 A robot’s battery holds 800 mAh and the robot uses 100 mA. For how many hours can it run?
  3. 3.🔋 Battery capacity (how much it holds) is often written in … (a) mAh (b) km (c) kg (d) °C
  4. 4.🔋 What should you do with a swollen or damaged robot battery? (a) charge it again (b) squeeze it flat (c) throw it in a fire (d) give it to an adult
  5. 5.🔋 A robot’s battery is at 75% and charging adds 25% every 10 minutes. How many minutes until it is full (100%)?
  6. 6.🔋 A robot’s battery is at 10% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  7. 7.🔋 What powers most moving robots? (a) a tiny magnet (b) a water tank (c) a candle (d) a rechargeable battery
  8. 8.🔋 A robot’s battery is at 25% and charging adds 25% every 10 minutes. How many minutes until it is full (100%)?
  9. 9.🔋 A robot uses 20% of its battery every 3 minutes. How many minutes does a full battery (100%) last?
  10. 10.🔋 A robot runs on 2 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  11. 11.🔋 A robot’s battery is at 40%. Each lap of the track uses 10%. How many laps can it do before the battery reaches 0%?
  12. 12.🔋 A robot runs on 3 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  13. 13.🔋 A robot’s battery holds 2500 mAh and the robot uses 500 mA. For how many hours can it run?
  14. 14.🔋 A robot uses 4% of its battery every 6 minutes. How many minutes does a full battery (100%) last?
  15. 15.🔋 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%?
  16. 16.🔋 What does a robot vacuum do when its battery is low? (a) keeps going for ever (b) turns into a car (c) goes back to its dock (d) explodes
  17. 17.🔋 A robot runs on 8 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  18. 18.🔋 A robot’s battery holds 400 mAh and the robot uses 100 mA. For how many hours can it run?
  19. 19.🔋 A robot uses 10% of its battery every 2 minutes. How many minutes does a full battery (100%) last?
  20. 20.🔋 A robot’s battery is at 30% and charging adds 10% every 10 minutes. How many minutes until it is full (100%)?
  21. 21.🔋 A robot uses 25% of its battery every 1 minute. How many minutes does a full battery (100%) last?
  22. 22.🔋 A robot’s battery holds 1400 mAh and the robot uses 200 mA. For how many hours can it run?
  23. 23.🔋 Many robots on far-away planets get energy from … (a) wind-up keys (b) petrol pumps (c) sunlight (solar panels) (d) shop batteries
  24. 24.🔋 A robot runs on 5 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  25. 25.🔋 A robot’s battery holds 300 mAh and the robot uses 100 mA. For how many hours can it run?
  26. 26.🔋 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%?
  27. 27.🔋 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%?
  28. 28.🔋 A robot uses 5% of its battery every 2 minutes. How many minutes does a full battery (100%) last?
  29. 29.🔋 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%?
  30. 30.🔋 A robot uses 20% of its battery every 1 minute. How many minutes does a full battery (100%) last?
  31. 31.🔋 A robot’s battery is at 100%. Each lap of the track uses 5%. How many laps can it do before the battery reaches 0%?
  32. 32.🔋 A robot’s battery is at 80%. Each lap of the track uses 10%. How many laps can it do before the battery reaches 0%?
  33. 33.🔋 A robot uses 2% of its battery every 3 minutes. How many minutes does a full battery (100%) last?
  34. 34.🔋 A robot’s battery holds 400 mAh and the robot uses 400 mA. For how many hours can it run?
  35. 35.🔋 A robot arm bolted to a factory floor usually gets its power from … (a) a power cable (b) a coin cell (c) a solar panel (d) a wind-up key
  36. 36.🔋 A robot runs on 4 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  37. 37.🔋 A robot’s battery is at 45% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  38. 38.🔋 A robot’s battery is at 80% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  39. 39.🔋 A robot runs on 6 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  40. 40.🔋 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%?

Answer key

  1. 50
  2. 8
  3. mAh
  4. give it to an adult
  5. 10
  6. 180
  7. a rechargeable battery
  8. 30
  9. 15
  10. 3
  11. 4
  12. 4.5
  13. 5
  14. 150
  15. 16
  16. goes back to its dock
  17. 12
  18. 4
  19. 20
  20. 70
  21. 4
  22. 7
  23. sunlight (solar panels)
  24. 7.5
  25. 3
  26. 5
  27. 3
  28. 40
  29. 9
  30. 5
  31. 20
  32. 8
  33. 150
  34. 1
  35. a power cable
  36. 6
  37. 110
  38. 40
  39. 9
  40. 10

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