← Power for robots lesson New set →

Robotics Worksheet: Robot Batteries

Robotics lesson 4: Power for robots · Set 604 · 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 250 mAh and the robot uses 250 mA. For how many hours can it run?
  2. 2.🔋 A robot uses 4% of its battery every 5 minutes. How many minutes does a full battery (100%) last?
  3. 3.🔋 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%?
  4. 4.🔋 A robot’s battery holds 3000 mAh and the robot uses 1000 mA. For how many hours can it run?
  5. 5.🔋 A robot runs on 8 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  6. 6.🔋 A robot’s battery holds 2000 mAh and the robot uses 400 mA. For how many hours can it run?
  7. 7.🔋 A robot uses 10% of its battery every 3 minutes. How many minutes does a full battery (100%) last?
  8. 8.🔋 A robot runs on 3 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  9. 9.🔋 A robot uses 2% of its battery every 2 minutes. How many minutes does a full battery (100%) last?
  10. 10.🔋 A robot uses 4% of its battery every 3 minutes. How many minutes does a full battery (100%) last?
  11. 11.🔋 A robot runs on 6 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  12. 12.🔋 What should you do with a swollen or damaged robot battery? (a) charge it again (b) give it to an adult (c) squeeze it flat (d) throw it in a fire
  13. 13.🔋 Many robots on far-away planets get energy from … (a) sunlight (solar panels) (b) shop batteries (c) wind-up keys (d) petrol pumps
  14. 14.🔋 A robot arm bolted to a factory floor usually gets its power from … (a) a power cable (b) a wind-up key (c) a solar panel (d) a coin cell
  15. 15.🔋 A robot’s battery holds 4000 mAh and the robot uses 500 mA. For how many hours can it run?
  16. 16.🔋 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%?
  17. 17.🔋 A robot’s battery holds 1000 mAh and the robot uses 500 mA. For how many hours can it run?
  18. 18.🔋 A robot uses 5% of its battery every 2 minutes. How many minutes does a full battery (100%) last?
  19. 19.🔋 A robot runs on 7 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  20. 20.🔋 A robot’s battery holds 8000 mAh and the robot uses 1000 mA. For how many hours can it run?
  21. 21.🔋 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%?
  22. 22.🔋 A robot’s battery is at 25% and charging adds 25% every 10 minutes. How many minutes until it is full (100%)?
  23. 23.🔋 A robot uses 2% of its battery every 6 minutes. How many minutes does a full battery (100%) last?
  24. 24.🔋 A robot uses 10% of its battery every 5 minutes. How many minutes does a full battery (100%) last?
  25. 25.🔋 A robot’s battery is at 85% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  26. 26.🔋 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%?
  27. 27.🔋 What powers most moving robots? (a) a rechargeable battery (b) a water tank (c) a tiny magnet (d) a candle
  28. 28.🔋 A robot’s battery holds 3500 mAh and the robot uses 500 mA. For how many hours can it run?
  29. 29.🔋 A robot’s battery is at 75% and charging adds 25% every 10 minutes. How many minutes until it is full (100%)?
  30. 30.🔋 Battery capacity (how much it holds) is often written in … (a) km (b) mAh (c) kg (d) °C
  31. 31.🔋 A robot’s battery holds 1750 mAh and the robot uses 250 mA. For how many hours can it run?
  32. 32.🔋 A robot’s battery holds 3000 mAh and the robot uses 500 mA. For how many hours can it run?
  33. 33.🔋 A robot’s battery is at 90% and charging adds 10% every 10 minutes. How many minutes until it is full (100%)?
  34. 34.🔋 A robot runs on 5 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  35. 35.🔋 A robot’s battery holds 5000 mAh and the robot uses 1000 mA. For how many hours can it run?
  36. 36.🔋 A robot’s battery holds 1600 mAh and the robot uses 400 mA. For how many hours can it run?
  37. 37.🔋 A robot’s battery holds 1000 mAh and the robot uses 250 mA. For how many hours can it run?
  38. 38.🔋 A robot runs on 2 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  39. 39.🔋 A robot’s battery holds 400 mAh and the robot uses 200 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) turns into a car (c) keeps going for ever (d) explodes

Answer key

  1. 1
  2. 125
  3. 2
  4. 3
  5. 12
  6. 5
  7. 30
  8. 4.5
  9. 100
  10. 75
  11. 9
  12. give it to an adult
  13. sunlight (solar panels)
  14. a power cable
  15. 8
  16. 3
  17. 2
  18. 40
  19. 10.5
  20. 8
  21. 2
  22. 30
  23. 300
  24. 50
  25. 30
  26. 4
  27. a rechargeable battery
  28. 7
  29. 10
  30. mAh
  31. 7
  32. 6
  33. 10
  34. 7.5
  35. 5
  36. 4
  37. 4
  38. 3
  39. 2
  40. goes back to its dock

Free robotics lessons, practice and worksheets at talentjr.in/robotics-for-kids