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Robotics Worksheet: Robot Batteries

Robotics lesson 4: Power for robots · Set 918 · 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 80% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  2. 2.🔋 A robot’s battery holds 7000 mAh and the robot uses 1000 mA. For how many hours can it run?
  3. 3.🔋 A robot arm bolted to a factory floor usually gets its power from … (a) a wind-up key (b) a coin cell (c) a solar panel (d) a power cable
  4. 4.🔋 A robot runs on 5 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  5. 5.🔋 A robot’s battery is at 80%. Each lap of the track uses 20%. How many laps can it do before the battery reaches 0%?
  6. 6.🔋 Many robots on far-away planets get energy from … (a) wind-up keys (b) shop batteries (c) sunlight (solar panels) (d) petrol pumps
  7. 7.🔋 A robot’s battery holds 400 mAh and the robot uses 100 mA. For how many hours can it run?
  8. 8.🔋 A robot’s battery holds 400 mAh and the robot uses 400 mA. For how many hours can it run?
  9. 9.🔋 A robot uses 2% of its battery every 1 minute. How many minutes does a full battery (100%) last?
  10. 10.🔋 A robot uses 2% of its battery every 2 minutes. How many minutes does a full battery (100%) last?
  11. 11.🔋 A robot’s battery is at 80% and charging adds 20% every 10 minutes. How many minutes until it is full (100%)?
  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 100 mAh and the robot uses 100 mA. For how many hours can it run?
  14. 14.🔋 A robot runs on 7 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  15. 15.🔋 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%?
  16. 16.🔋 A robot’s battery holds 1200 mAh and the robot uses 200 mA. For how many hours can it run?
  17. 17.🔋 A robot’s battery holds 1500 mAh and the robot uses 500 mA. For how many hours can it run?
  18. 18.🔋 A robot’s battery is at 5% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  19. 19.🔋 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%?
  20. 20.🔋 A robot’s battery holds 700 mAh and the robot uses 100 mA. For how many hours can it run?
  21. 21.🔋 A robot’s battery is at 15% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  22. 22.🔋 A robot uses 5% of its battery every 4 minutes. How many minutes does a full battery (100%) last?
  23. 23.🔋 A robot uses 2% of its battery every 4 minutes. How many minutes does a full battery (100%) last?
  24. 24.🔋 A robot’s battery is at 70%. 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 75%. Each lap of the track uses 25%. How many laps can it do before the battery reaches 0%?
  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 uses 20% of its battery every 1 minute. How many minutes does a full battery (100%) last?
  28. 28.🔋 Battery capacity (how much it holds) is often written in … (a) °C (b) kg (c) mAh (d) km
  29. 29.🔋 A robot runs on 4 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  30. 30.🔋 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%?
  31. 31.🔋 What does a robot vacuum do when its battery is low? (a) keeps going for ever (b) goes back to its dock (c) explodes (d) turns into a car
  32. 32.🔋 A robot uses 20% of its battery every 3 minutes. How many minutes does a full battery (100%) last?
  33. 33.🔋 A robot’s battery holds 250 mAh and the robot uses 250 mA. For how many hours can it run?
  34. 34.🔋 A robot’s battery is at 60%. Each lap of the track uses 10%. How many laps can it do before the battery reaches 0%?
  35. 35.🔋 A robot’s battery is at 0% and charging adds 25% every 10 minutes. How many minutes until it is full (100%)?
  36. 36.🔋 A robot’s battery holds 200 mAh and the robot uses 200 mA. For how many hours can it run?
  37. 37.🔋 A robot uses 4% of its battery every 4 minutes. How many minutes does a full battery (100%) last?
  38. 38.🔋 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%?
  39. 39.🔋 What should you do with a swollen or damaged robot battery? (a) throw it in a fire (b) give it to an adult (c) charge it again (d) squeeze it flat
  40. 40.🔋 A robot’s battery holds 2000 mAh and the robot uses 500 mA. For how many hours can it run?

Answer key

  1. 40
  2. 7
  3. a power cable
  4. 7.5
  5. 4
  6. sunlight (solar panels)
  7. 4
  8. 1
  9. 50
  10. 100
  11. 10
  12. 4.5
  13. 1
  14. 10.5
  15. 2
  16. 6
  17. 3
  18. 190
  19. 5
  20. 7
  21. 170
  22. 80
  23. 200
  24. 7
  25. 3
  26. 25
  27. 5
  28. mAh
  29. 6
  30. 18
  31. goes back to its dock
  32. 15
  33. 1
  34. 6
  35. 40
  36. 1
  37. 100
  38. 2
  39. give it to an adult
  40. 4

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