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Robotics Worksheet: Robot Batteries

Robotics lesson 4: Power for robots · Set 150 · 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 45% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  2. 2.🔋 A robot uses 5% of its battery every 4 minutes. How many minutes does a full battery (100%) last?
  3. 3.🔋 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
  4. 4.🔋 A robot’s battery holds 800 mAh and the robot uses 200 mA. For how many hours can it run?
  5. 5.🔋 Many robots on far-away planets get energy from … (a) wind-up keys (b) shop batteries (c) sunlight (solar panels) (d) petrol pumps
  6. 6.🔋 A robot’s battery is at 80% and charging adds 20% every 10 minutes. How many minutes until it is full (100%)?
  7. 7.🔋 A robot’s battery is at 75%. Each lap of the track uses 25%. How many laps can it do before the battery reaches 0%?
  8. 8.🔋 A robot runs on 2 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  9. 9.🔋 A robot uses 10% of its battery every 4 minutes. How many minutes does a full battery (100%) last?
  10. 10.🔋 A robot runs on 4 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  11. 11.🔋 A robot uses 25% of its battery every 1 minute. How many minutes does a full battery (100%) last?
  12. 12.🔋 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%?
  13. 13.🔋 A robot runs on 5 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  14. 14.🔋 A robot’s battery holds 2000 mAh and the robot uses 1000 mA. For how many hours can it run?
  15. 15.🔋 A robot’s battery is at 40% and charging adds 20% every 10 minutes. How many minutes until it is full (100%)?
  16. 16.🔋 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%?
  17. 17.🔋 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%?
  18. 18.🔋 A robot’s battery holds 1000 mAh and the robot uses 500 mA. For how many hours can it run?
  19. 19.🔋 A robot uses 20% of its battery every 6 minutes. How many minutes does a full battery (100%) last?
  20. 20.🔋 A robot’s battery is at 25% and charging adds 25% every 10 minutes. How many minutes until it is full (100%)?
  21. 21.🔋 A robot’s battery is at 60% and charging adds 10% every 10 minutes. How many minutes until it is full (100%)?
  22. 22.🔋 A robot’s battery holds 2000 mAh and the robot uses 250 mA. For how many hours can it run?
  23. 23.🔋 A robot’s battery holds 500 mAh and the robot uses 500 mA. For how many hours can it run?
  24. 24.🔋 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%?
  25. 25.🔋 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%?
  26. 26.🔋 A robot’s battery is at 90%. Each lap of the track uses 5%. How many laps can it do before the battery reaches 0%?
  27. 27.🔋 What should you do with a swollen or damaged robot battery? (a) squeeze it flat (b) charge it again (c) throw it in a fire (d) give it to an adult
  28. 28.🔋 A robot’s battery is at 75% and charging adds 25% every 10 minutes. How many minutes until it is full (100%)?
  29. 29.🔋 A robot’s battery holds 250 mAh and the robot uses 250 mA. For how many hours can it run?
  30. 30.🔋 Battery capacity (how much it holds) is often written in … (a) km (b) °C (c) mAh (d) kg
  31. 31.🔋 A robot uses 2% of its battery every 6 minutes. How many minutes does a full battery (100%) last?
  32. 32.🔋 A robot’s battery is at 20% and charging adds 20% every 10 minutes. How many minutes until it is full (100%)?
  33. 33.🔋 A robot uses 10% of its battery every 1 minute. How many minutes does a full battery (100%) last?
  34. 34.🔋 A robot’s battery is at 20% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  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’s battery is at 20%. Each lap of the track uses 10%. How many laps can it do before the battery reaches 0%?
  37. 37.🔋 A robot’s battery holds 300 mAh and the robot uses 100 mA. For how many hours can it run?
  38. 38.🔋 A robot runs on 6 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  39. 39.🔋 A robot’s battery holds 2000 mAh and the robot uses 400 mA. For how many hours can it run?
  40. 40.🔋 What does a robot vacuum do when its battery is low? (a) goes back to its dock (b) explodes (c) turns into a car (d) keeps going for ever

Answer key

  1. 110
  2. 80
  3. a power cable
  4. 4
  5. sunlight (solar panels)
  6. 10
  7. 3
  8. 3
  9. 40
  10. 6
  11. 4
  12. 2
  13. 7.5
  14. 2
  15. 30
  16. 2
  17. 5
  18. 2
  19. 30
  20. 30
  21. 40
  22. 8
  23. 1
  24. 10
  25. 16
  26. 18
  27. give it to an adult
  28. 10
  29. 1
  30. mAh
  31. 300
  32. 40
  33. 10
  34. 160
  35. 4
  36. 2
  37. 3
  38. 9
  39. 5
  40. goes back to its dock

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