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Robotics Worksheet: Robot Batteries

Robotics lesson 4: Power for robots · Set 400 · 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 4000 mAh and the robot uses 500 mA. For how many hours can it run?
  2. 2.🔋 A robot uses 5% of its battery every 6 minutes. How many minutes does a full battery (100%) last?
  3. 3.🔋 A robot’s battery is at 10% and charging adds 10% every 10 minutes. How many minutes until it is full (100%)?
  4. 4.🔋 A robot runs on 3 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  5. 5.🔋 A robot runs on 4 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  6. 6.🔋 A robot’s battery is at 5% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  7. 7.🔋 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%?
  8. 8.🔋 A robot’s battery is at 35% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  9. 9.🔋 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%?
  10. 10.🔋 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%?
  11. 11.🔋 A robot’s battery is at 0% and charging adds 25% every 10 minutes. How many minutes until it is full (100%)?
  12. 12.🔋 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%?
  13. 13.🔋 A robot runs on 7 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  14. 14.🔋 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%?
  15. 15.🔋 A robot’s battery holds 750 mAh and the robot uses 250 mA. For how many hours can it run?
  16. 16.🔋 A robot uses 25% of its battery every 4 minutes. How many minutes does a full battery (100%) last?
  17. 17.🔋 A robot runs on 2 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  18. 18.🔋 Battery capacity (how much it holds) is often written in … (a) km (b) °C (c) mAh (d) kg
  19. 19.🔋 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%?
  20. 20.🔋 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
  21. 21.🔋 A robot’s battery holds 3500 mAh and the robot uses 500 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) explodes (c) goes back to its dock (d) keeps going for ever
  23. 23.🔋 A robot uses 10% of its battery every 1 minute. How many minutes does a full battery (100%) last?
  24. 24.🔋 A robot’s battery holds 400 mAh and the robot uses 100 mA. For how many hours can it run?
  25. 25.🔋 A robot’s battery is at 10% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  26. 26.🔋 A robot uses 20% of its battery every 5 minutes. How many minutes does a full battery (100%) last?
  27. 27.🔋 A robot arm bolted to a factory floor usually gets its power from … (a) a coin cell (b) a wind-up key (c) a power cable (d) a solar panel
  28. 28.🔋 A robot uses 25% of its battery every 1 minute. How many minutes does a full battery (100%) last?
  29. 29.🔋 A robot’s battery holds 3200 mAh and the robot uses 400 mA. For how many hours can it run?
  30. 30.🔋 A robot’s battery is at 80% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  31. 31.🔋 A robot uses 20% of its battery every 6 minutes. How many minutes does a full battery (100%) last?
  32. 32.🔋 A robot’s battery is at 75% and charging adds 25% every 10 minutes. How many minutes until it is full (100%)?
  33. 33.🔋 A robot’s battery is at 40% and charging adds 10% every 10 minutes. How many minutes until it is full (100%)?
  34. 34.🔋 A robot uses 4% of its battery every 4 minutes. How many minutes does a full battery (100%) last?
  35. 35.🔋 A robot runs on 8 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  36. 36.🔋 A robot runs on 6 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  37. 37.🔋 A robot uses 25% of its battery every 2 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 25%. How many laps can it do before the battery reaches 0%?
  39. 39.🔋 A robot uses 25% of its battery every 5 minutes. How many minutes does a full battery (100%) last?
  40. 40.🔋 A robot’s battery is at 80% and charging adds 20% every 10 minutes. How many minutes until it is full (100%)?

Answer key

  1. 8
  2. 120
  3. 90
  4. 4.5
  5. 6
  6. 190
  7. 5
  8. 130
  9. 3
  10. 2
  11. 40
  12. 15
  13. 10.5
  14. 3
  15. 3
  16. 16
  17. 3
  18. mAh
  19. 3
  20. give it to an adult
  21. 7
  22. goes back to its dock
  23. 10
  24. 4
  25. 180
  26. 25
  27. a power cable
  28. 4
  29. 8
  30. 40
  31. 30
  32. 10
  33. 60
  34. 100
  35. 12
  36. 9
  37. 8
  38. 4
  39. 20
  40. 10

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