← Power for robots lesson New set →

Robotics Worksheet: Robot Batteries

Robotics lesson 4: Power for robots · Set 467 · 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.🔋 What does a robot vacuum do when its battery is low? (a) explodes (b) turns into a car (c) keeps going for ever (d) goes back to its dock
  2. 2.🔋 A robot’s battery holds 3500 mAh and the robot uses 500 mA. For how many hours can it run?
  3. 3.🔋 A robot runs on 3 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  4. 4.🔋 A robot’s battery holds 250 mAh and the robot uses 250 mA. For how many hours can it run?
  5. 5.🔋 Battery capacity (how much it holds) is often written in … (a) km (b) mAh (c) kg (d) °C
  6. 6.🔋 A robot uses 20% of its battery every 5 minutes. How many minutes does a full battery (100%) last?
  7. 7.🔋 A robot’s battery is at 50% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  8. 8.🔋 A robot’s battery is at 0% and charging adds 25% every 10 minutes. How many minutes until it is full (100%)?
  9. 9.🔋 A robot’s battery holds 200 mAh and the robot uses 200 mA. For how many hours can it run?
  10. 10.🔋 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%?
  11. 11.🔋 A robot’s battery holds 2000 mAh and the robot uses 1000 mA. For how many hours can it run?
  12. 12.🔋 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%?
  13. 13.🔋 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%?
  14. 14.🔋 A robot’s battery holds 5000 mAh and the robot uses 1000 mA. For how many hours can it run?
  15. 15.🔋 A robot uses 2% of its battery every 2 minutes. How many minutes does a full battery (100%) last?
  16. 16.🔋 A robot arm bolted to a factory floor usually gets its power from … (a) a coin cell (b) a power cable (c) a solar panel (d) a wind-up key
  17. 17.🔋 What powers most moving robots? (a) a rechargeable battery (b) a water tank (c) a candle (d) a tiny magnet
  18. 18.🔋 A robot runs on 5 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  19. 19.🔋 A robot’s battery holds 1400 mAh and the robot uses 200 mA. For how many hours can it run?
  20. 20.🔋 A robot runs on 8 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  21. 21.🔋 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%?
  22. 22.🔋 A robot’s battery is at 50% and charging adds 10% every 10 minutes. How many minutes until it is full (100%)?
  23. 23.🔋 A robot’s battery is at 95% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  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 holds 500 mAh and the robot uses 100 mA. For how many hours can it run?
  26. 26.🔋 A robot runs on 4 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  27. 27.🔋 A robot’s battery is at 10%. 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 40% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  29. 29.🔋 A robot’s battery is at 20% and charging adds 20% every 10 minutes. How many minutes until it is full (100%)?
  30. 30.🔋 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%?
  31. 31.🔋 A robot’s battery holds 1600 mAh and the robot uses 200 mA. For how many hours can it run?
  32. 32.🔋 A robot’s battery holds 800 mAh and the robot uses 100 mA. For how many hours can it run?
  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’s battery holds 400 mAh and the robot uses 200 mA. For how many hours can it run?
  35. 35.🔋 A robot’s battery holds 2000 mAh and the robot uses 400 mA. For how many hours can it run?
  36. 36.🔋 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%?
  37. 37.🔋 A robot runs on 2 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  38. 38.🔋 A robot uses 5% of its battery every 3 minutes. How many minutes does a full battery (100%) last?
  39. 39.🔋 A robot’s battery holds 100 mAh and the robot uses 100 mA. For how many hours can it run?
  40. 40.🔋 A robot’s battery is at 5% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?

Answer key

  1. goes back to its dock
  2. 7
  3. 4.5
  4. 1
  5. mAh
  6. 25
  7. 100
  8. 40
  9. 1
  10. 4
  11. 2
  12. 3
  13. 3
  14. 5
  15. 100
  16. a power cable
  17. a rechargeable battery
  18. 7.5
  19. 7
  20. 12
  21. 9
  22. 50
  23. 10
  24. 4
  25. 5
  26. 6
  27. 2
  28. 120
  29. 40
  30. 5
  31. 8
  32. 8
  33. 60
  34. 2
  35. 5
  36. 4
  37. 3
  38. 60
  39. 1
  40. 190

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