← Power for robots lesson New set →

Robotics Worksheet: Robot Batteries

Robotics lesson 4: Power for robots · Set 613 · 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 10% and charging adds 10% every 10 minutes. How many minutes until it is full (100%)?
  2. 2.🔋 What does a robot vacuum do when its battery is low? (a) keeps going for ever (b) explodes (c) goes back to its dock (d) turns into a car
  3. 3.🔋 A robot’s battery is at 20% and charging adds 10% every 10 minutes. How many minutes until it is full (100%)?
  4. 4.🔋 A robot runs on 7 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  5. 5.🔋 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%?
  6. 6.🔋 A robot runs on 3 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  7. 7.🔋 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%?
  8. 8.🔋 A robot runs on 5 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  9. 9.🔋 A robot uses 10% of its battery every 4 minutes. How many minutes does a full battery (100%) last?
  10. 10.🔋 A robot uses 25% of its battery every 6 minutes. How many minutes does a full battery (100%) last?
  11. 11.🔋 Many robots on far-away planets get energy from … (a) petrol pumps (b) shop batteries (c) wind-up keys (d) sunlight (solar panels)
  12. 12.🔋 A robot arm bolted to a factory floor usually gets its power from … (a) a solar panel (b) a wind-up key (c) a coin cell (d) a power cable
  13. 13.🔋 A robot’s battery holds 800 mAh and the robot uses 200 mA. For how many hours can it run?
  14. 14.🔋 A robot’s battery holds 1000 mAh and the robot uses 1000 mA. For how many hours can it run?
  15. 15.🔋 A robot’s battery holds 200 mAh and the robot uses 200 mA. For how many hours can it run?
  16. 16.🔋 A robot uses 2% of its battery every 4 minutes. How many minutes does a full battery (100%) last?
  17. 17.🔋 A robot uses 2% of its battery every 3 minutes. How many minutes does a full battery (100%) last?
  18. 18.🔋 A robot runs on 4 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  19. 19.🔋 A robot’s battery is at 25%. Each lap of the track uses 5%. How many laps can it do before the battery reaches 0%?
  20. 20.🔋 A robot’s battery is at 85%. Each lap of the track uses 5%. How many laps can it do before the battery reaches 0%?
  21. 21.🔋 A robot’s battery is at 80%. Each lap of the track uses 10%. How many laps can it do before the battery reaches 0%?
  22. 22.🔋 What should you do with a swollen or damaged robot battery? (a) squeeze it flat (b) throw it in a fire (c) charge it again (d) give it to an adult
  23. 23.🔋 A robot’s battery holds 8000 mAh and the robot uses 1000 mA. For how many hours can it run?
  24. 24.🔋 A robot’s battery holds 2400 mAh and the robot uses 400 mA. For how many hours can it run?
  25. 25.🔋 A robot’s battery is at 50% and charging adds 10% every 10 minutes. How many minutes until it is full (100%)?
  26. 26.🔋 What powers most moving robots? (a) a candle (b) a rechargeable battery (c) a water tank (d) a tiny magnet
  27. 27.🔋 A robot’s battery is at 30% and charging adds 10% every 10 minutes. How many minutes until it is full (100%)?
  28. 28.🔋 A robot’s battery holds 250 mAh and the robot uses 250 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.🔋 A robot runs on 2 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  31. 31.🔋 A robot’s battery holds 1000 mAh and the robot uses 500 mA. For how many hours can it run?
  32. 32.🔋 A robot’s battery holds 400 mAh and the robot uses 100 mA. For how many hours can it run?
  33. 33.🔋 A robot’s battery is at 70% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  34. 34.🔋 A robot’s battery is at 45%. Each lap of the track uses 5%. How many laps can it do before the battery reaches 0%?
  35. 35.🔋 A robot’s battery holds 2800 mAh and the robot uses 400 mA. For how many hours can it run?
  36. 36.🔋 A robot’s battery holds 600 mAh and the robot uses 200 mA. For how many hours can it run?
  37. 37.🔋 A robot uses 10% of its battery every 2 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 5%. How many laps can it do before the battery reaches 0%?
  39. 39.🔋 A robot’s battery is at 100%. Each lap of the track uses 10%. How many laps can it do before the battery reaches 0%?
  40. 40.🔋 A robot’s battery holds 400 mAh and the robot uses 400 mA. For how many hours can it run?

Answer key

  1. 90
  2. goes back to its dock
  3. 80
  4. 10.5
  5. 9
  6. 4.5
  7. 5
  8. 7.5
  9. 40
  10. 24
  11. sunlight (solar panels)
  12. a power cable
  13. 4
  14. 1
  15. 1
  16. 200
  17. 150
  18. 6
  19. 5
  20. 17
  21. 8
  22. give it to an adult
  23. 8
  24. 6
  25. 50
  26. a rechargeable battery
  27. 70
  28. 1
  29. 10
  30. 3
  31. 2
  32. 4
  33. 60
  34. 9
  35. 7
  36. 3
  37. 20
  38. 4
  39. 10
  40. 1

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