← Power for robots lesson New set →

Robotics Worksheet: Robot Batteries

Robotics lesson 4: Power for robots · Set 9 · 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 0% and charging adds 20% every 10 minutes. How many minutes until it is full (100%)?
  2. 2.🔋 A robot runs on 2 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  3. 3.🔋 What powers most moving robots? (a) a rechargeable battery (b) a water tank (c) a candle (d) a tiny magnet
  4. 4.🔋 Battery capacity (how much it holds) is often written in … (a) km (b) mAh (c) kg (d) °C
  5. 5.🔋 A robot’s battery holds 1400 mAh and the robot uses 200 mA. For how many hours can it run?
  6. 6.🔋 A robot runs on 8 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  7. 7.🔋 A robot uses 20% of its battery every 4 minutes. How many minutes does a full battery (100%) last?
  8. 8.🔋 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%?
  9. 9.🔋 A robot’s battery is at 70% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  10. 10.🔋 A robot’s battery is at 60%. Each lap of the track uses 5%. How many laps can it do before the battery reaches 0%?
  11. 11.🔋 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%?
  12. 12.🔋 A robot’s battery holds 200 mAh and the robot uses 100 mA. For how many hours can it run?
  13. 13.🔋 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%?
  14. 14.🔋 A robot runs on 3 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  15. 15.🔋 A robot uses 10% of its battery every 4 minutes. How many minutes does a full battery (100%) last?
  16. 16.🔋 A robot’s battery is at 80% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  17. 17.🔋 A robot’s battery holds 300 mAh and the robot uses 100 mA. For how many hours can it run?
  18. 18.🔋 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%?
  19. 19.🔋 A robot runs on 6 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  20. 20.🔋 A robot uses 25% of its battery every 2 minutes. How many minutes does a full battery (100%) last?
  21. 21.🔋 A robot’s battery is at 85% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  22. 22.🔋 What does a robot vacuum do when its battery is low? (a) explodes (b) keeps going for ever (c) goes back to its dock (d) turns into a car
  23. 23.🔋 A robot uses 10% of its battery every 6 minutes. How many minutes does a full battery (100%) last?
  24. 24.🔋 A robot uses 2% of its battery every 2 minutes. How many minutes does a full battery (100%) last?
  25. 25.🔋 A robot’s battery is at 20%. Each lap of the track uses 5%. How many laps can it do before the battery reaches 0%?
  26. 26.🔋 A robot’s battery is at 60% and charging adds 20% every 10 minutes. How many minutes until it is full (100%)?
  27. 27.🔋 A robot arm bolted to a factory floor usually gets its power from … (a) a solar panel (b) a wind-up key (c) a power cable (d) a coin cell
  28. 28.🔋 A robot’s battery holds 1200 mAh and the robot uses 400 mA. For how many hours can it run?
  29. 29.🔋 A robot uses 10% of its battery every 5 minutes. How many minutes does a full battery (100%) last?
  30. 30.🔋 A robot’s battery holds 800 mAh and the robot uses 400 mA. For how many hours can it run?
  31. 31.🔋 A robot’s battery holds 1500 mAh and the robot uses 500 mA. For how many hours can it run?
  32. 32.🔋 A robot’s battery holds 750 mAh and the robot uses 250 mA. For how many hours can it run?
  33. 33.🔋 A robot’s battery is at 30% and charging adds 10% every 10 minutes. How many minutes until it is full (100%)?
  34. 34.🔋 A robot uses 20% of its battery every 1 minute. How many minutes does a full battery (100%) last?
  35. 35.🔋 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%?
  36. 36.🔋 A robot’s battery holds 1000 mAh and the robot uses 250 mA. For how many hours can it run?
  37. 37.🔋 A robot runs on 7 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  38. 38.🔋 A robot runs on 4 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  39. 39.🔋 A robot uses 5% of its battery every 2 minutes. How many minutes does a full battery (100%) last?
  40. 40.🔋 A robot uses 20% of its battery every 3 minutes. How many minutes does a full battery (100%) last?

Answer key

  1. 50
  2. 3
  3. a rechargeable battery
  4. mAh
  5. 7
  6. 12
  7. 20
  8. 2
  9. 60
  10. 12
  11. 2
  12. 2
  13. 5
  14. 4.5
  15. 40
  16. 40
  17. 3
  18. 3
  19. 9
  20. 8
  21. 30
  22. goes back to its dock
  23. 60
  24. 100
  25. 4
  26. 20
  27. a power cable
  28. 3
  29. 50
  30. 2
  31. 3
  32. 3
  33. 70
  34. 5
  35. 15
  36. 4
  37. 10.5
  38. 6
  39. 40
  40. 15

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