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Robotics Worksheet: Robot Batteries

Robotics lesson 4: Power for robots · Set 359 · 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 holds 200 mAh and the robot uses 200 mA. For how many hours can it run?
  2. 2.🔋 A robot runs on 4 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  3. 3.🔋 A robot’s battery holds 1000 mAh and the robot uses 250 mA. For how many hours can it run?
  4. 4.🔋 A robot’s battery is at 40% and charging adds 20% every 10 minutes. How many minutes until it is full (100%)?
  5. 5.🔋 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
  6. 6.🔋 Battery capacity (how much it holds) is often written in … (a) km (b) kg (c) mAh (d) °C
  7. 7.🔋 A robot uses 25% of its battery every 1 minute. How many minutes does a full battery (100%) last?
  8. 8.🔋 Many robots on far-away planets get energy from … (a) sunlight (solar panels) (b) shop batteries (c) wind-up keys (d) petrol pumps
  9. 9.🔋 A robot’s battery is at 30% and charging adds 10% every 10 minutes. How many minutes until it is full (100%)?
  10. 10.🔋 A robot arm bolted to a factory floor usually gets its power from … (a) a coin cell (b) a wind-up key (c) a solar panel (d) a power cable
  11. 11.🔋 A robot’s battery holds 500 mAh and the robot uses 250 mA. For how many hours can it run?
  12. 12.🔋 What should you do with a swollen or damaged robot battery? (a) charge it again (b) throw it in a fire (c) give it to an adult (d) squeeze it flat
  13. 13.🔋 A robot’s battery is at 0% and charging adds 20% every 10 minutes. How many minutes until it is full (100%)?
  14. 14.🔋 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%?
  15. 15.🔋 A robot’s battery holds 3500 mAh and the robot uses 500 mA. For how many hours can it run?
  16. 16.🔋 A robot’s battery holds 600 mAh and the robot uses 200 mA. For how many hours can it run?
  17. 17.🔋 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%?
  18. 18.🔋 A robot’s battery holds 1500 mAh and the robot uses 250 mA. For how many hours can it run?
  19. 19.🔋 A robot uses 20% of its battery every 1 minute. How many minutes does a full battery (100%) last?
  20. 20.🔋 A robot uses 4% of its battery every 2 minutes. How many minutes does a full battery (100%) last?
  21. 21.🔋 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%?
  22. 22.🔋 A robot’s battery is at 60% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  23. 23.🔋 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%?
  24. 24.🔋 A robot’s battery holds 100 mAh and the robot uses 100 mA. For how many hours can it run?
  25. 25.🔋 A robot runs on 8 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  26. 26.🔋 A robot runs on 2 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  27. 27.🔋 What powers most moving robots? (a) a rechargeable battery (b) a candle (c) a water tank (d) a tiny magnet
  28. 28.🔋 A robot uses 25% of its battery every 4 minutes. How many minutes does a full battery (100%) last?
  29. 29.🔋 A robot runs on 6 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  30. 30.🔋 A robot’s battery holds 2000 mAh and the robot uses 500 mA. For how many hours can it run?
  31. 31.🔋 A robot’s battery is at 80% and charging adds 20% every 10 minutes. How many minutes until it is full (100%)?
  32. 32.🔋 A robot’s battery holds 500 mAh and the robot uses 100 mA. For how many hours can it run?
  33. 33.🔋 A robot uses 4% of its battery every 5 minutes. How many minutes does a full battery (100%) last?
  34. 34.🔋 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%?
  35. 35.🔋 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%?
  36. 36.🔋 A robot uses 25% of its battery every 3 minutes. How many minutes does a full battery (100%) last?
  37. 37.🔋 A robot’s battery is at 0% and charging adds 25% every 10 minutes. How many minutes until it is full (100%)?
  38. 38.🔋 A robot’s battery is at 90% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  39. 39.🔋 A robot runs on 7 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  40. 40.🔋 A robot runs on 5 cells of 1.5 V joined in series. What is the total voltage (in volts)? =

Answer key

  1. 1
  2. 6
  3. 4
  4. 30
  5. goes back to its dock
  6. mAh
  7. 4
  8. sunlight (solar panels)
  9. 70
  10. a power cable
  11. 2
  12. give it to an adult
  13. 50
  14. 7
  15. 7
  16. 3
  17. 10
  18. 6
  19. 5
  20. 50
  21. 2
  22. 80
  23. 4
  24. 1
  25. 12
  26. 3
  27. a rechargeable battery
  28. 16
  29. 9
  30. 4
  31. 10
  32. 5
  33. 125
  34. 2
  35. 4
  36. 12
  37. 40
  38. 20
  39. 10.5
  40. 7.5

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