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Robotics Worksheet: Robot Batteries

Robotics lesson 4: Power for robots · Set 54 · 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 60% and charging adds 20% every 10 minutes. How many minutes until it is full (100%)?
  2. 2.🔋 A robot’s battery is at 0% and charging adds 25% every 10 minutes. How many minutes until it is full (100%)?
  3. 3.🔋 A robot uses 20% of its battery every 6 minutes. How many minutes does a full battery (100%) last?
  4. 4.🔋 Many robots on far-away planets get energy from … (a) shop batteries (b) wind-up keys (c) petrol pumps (d) sunlight (solar panels)
  5. 5.🔋 A robot runs on 6 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  6. 6.🔋 A robot runs on 8 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  7. 7.🔋 What should you do with a swollen or damaged robot battery? (a) throw it in a fire (b) squeeze it flat (c) give it to an adult (d) charge it again
  8. 8.🔋 A robot’s battery holds 2800 mAh and the robot uses 400 mA. For how many hours can it run?
  9. 9.🔋 Battery capacity (how much it holds) is often written in … (a) mAh (b) kg (c) °C (d) km
  10. 10.🔋 A robot runs on 3 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  11. 11.🔋 A robot’s battery holds 1200 mAh and the robot uses 200 mA. For how many hours can it run?
  12. 12.🔋 A robot runs on 5 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  13. 13.🔋 A robot’s battery is at 20% and charging adds 20% every 10 minutes. How many minutes until it is full (100%)?
  14. 14.🔋 A robot’s battery holds 4000 mAh and the robot uses 1000 mA. For how many hours can it run?
  15. 15.🔋 A robot’s battery is at 55%. 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) turns into a car (b) goes back to its dock (c) explodes (d) keeps going for ever
  17. 17.🔋 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%?
  18. 18.🔋 A robot’s battery holds 3000 mAh and the robot uses 1000 mA. For how many hours can it run?
  19. 19.🔋 A robot’s battery holds 250 mAh and the robot uses 250 mA. For how many hours can it run?
  20. 20.🔋 A robot runs on 4 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  21. 21.🔋 A robot uses 2% of its battery every 6 minutes. How many minutes does a full battery (100%) last?
  22. 22.🔋 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%?
  23. 23.🔋 A robot runs on 2 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  24. 24.🔋 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%?
  25. 25.🔋 A robot uses 10% of its battery every 4 minutes. How many minutes does a full battery (100%) last?
  26. 26.🔋 A robot’s battery is at 65%. Each lap of the track uses 5%. How many laps can it do before the battery reaches 0%?
  27. 27.🔋 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%?
  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 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
  30. 30.🔋 A robot’s battery is at 10% and charging adds 10% every 10 minutes. How many minutes until it is full (100%)?
  31. 31.🔋 A robot’s battery is at 30% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  32. 32.🔋 A robot uses 2% of its battery every 4 minutes. How many minutes does a full battery (100%) last?
  33. 33.🔋 A robot’s battery is at 5% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  34. 34.🔋 A robot’s battery holds 700 mAh and the robot uses 100 mA. For how many hours can it run?
  35. 35.🔋 A robot’s battery holds 4000 mAh and the robot uses 500 mA. For how many hours can it run?
  36. 36.🔋 A robot’s battery holds 1200 mAh and the robot uses 400 mA. For how many hours can it run?
  37. 37.🔋 A robot uses 20% of its battery every 4 minutes. How many minutes does a full battery (100%) last?
  38. 38.🔋 A robot’s battery holds 750 mAh and the robot uses 250 mA. For how many hours can it run?
  39. 39.🔋 A robot’s battery is at 80% and charging adds 20% every 10 minutes. How many minutes until it is full (100%)?
  40. 40.🔋 A robot uses 25% of its battery every 5 minutes. How many minutes does a full battery (100%) last?

Answer key

  1. 20
  2. 40
  3. 30
  4. sunlight (solar panels)
  5. 9
  6. 12
  7. give it to an adult
  8. 7
  9. mAh
  10. 4.5
  11. 6
  12. 7.5
  13. 40
  14. 4
  15. 11
  16. goes back to its dock
  17. 9
  18. 3
  19. 1
  20. 6
  21. 300
  22. 5
  23. 3
  24. 18
  25. 40
  26. 13
  27. 20
  28. 10
  29. a power cable
  30. 90
  31. 140
  32. 200
  33. 190
  34. 7
  35. 8
  36. 3
  37. 20
  38. 3
  39. 10
  40. 20

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