← Power for robots lesson New set →

Robotics Worksheet: Robot Batteries

Robotics lesson 4: Power for robots · Set 614 · 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 70%. Each lap of the track uses 5%. How many laps can it do before the battery reaches 0%?
  2. 2.🔋 A robot uses 5% of its battery every 4 minutes. How many minutes does a full battery (100%) last?
  3. 3.🔋 A robot’s battery holds 1500 mAh and the robot uses 500 mA. For how many hours can it run?
  4. 4.🔋 A robot uses 2% of its battery every 5 minutes. How many minutes does a full battery (100%) last?
  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.🔋 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%?
  7. 7.🔋 A robot’s battery holds 200 mAh and the robot uses 100 mA. For how many hours can it run?
  8. 8.🔋 A robot uses 25% of its battery every 2 minutes. How many minutes does a full battery (100%) last?
  9. 9.🔋 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%?
  10. 10.🔋 A robot’s battery holds 2500 mAh and the robot uses 500 mA. For how many hours can it run?
  11. 11.🔋 A robot runs on 8 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  12. 12.🔋 A robot’s battery is at 75% and charging adds 25% every 10 minutes. How many minutes until it is full (100%)?
  13. 13.🔋 A robot uses 5% of its battery every 1 minute. How many minutes does a full battery (100%) last?
  14. 14.🔋 A robot runs on 5 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  15. 15.🔋 A robot’s battery holds 1000 mAh and the robot uses 250 mA. For how many hours can it run?
  16. 16.🔋 A robot runs on 2 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  17. 17.🔋 Many robots on far-away planets get energy from … (a) petrol pumps (b) shop batteries (c) wind-up keys (d) sunlight (solar panels)
  18. 18.🔋 A robot’s battery holds 500 mAh and the robot uses 100 mA. For how many hours can it run?
  19. 19.🔋 A robot’s battery holds 750 mAh and the robot uses 250 mA. For how many hours can it run?
  20. 20.🔋 A robot’s battery is at 40% and charging adds 20% every 10 minutes. How many minutes until it is full (100%)?
  21. 21.🔋 A robot’s battery is at 35% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  22. 22.🔋 A robot’s battery is at 20% and charging adds 10% every 10 minutes. How many minutes until it is full (100%)?
  23. 23.🔋 A robot’s battery is at 95%. Each lap of the track uses 5%. How many laps can it do before the battery reaches 0%?
  24. 24.🔋 A robot uses 20% of its battery every 4 minutes. How many minutes does a full battery (100%) last?
  25. 25.🔋 A robot’s battery holds 7000 mAh and the robot uses 1000 mA. For how many hours can it run?
  26. 26.🔋 A robot arm bolted to a factory floor usually gets its power from … (a) a coin cell (b) a wind-up key (c) a power cable (d) a solar panel
  27. 27.🔋 What powers most moving robots? (a) a rechargeable battery (b) a tiny magnet (c) a water tank (d) a candle
  28. 28.🔋 A robot’s battery is at 80% and charging adds 10% 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 60% and charging adds 10% every 10 minutes. How many minutes until it is full (100%)?
  31. 31.🔋 A robot’s battery is at 0% and charging adds 25% every 10 minutes. How many minutes until it is full (100%)?
  32. 32.🔋 A robot runs on 6 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  33. 33.🔋 A robot runs on 7 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  34. 34.🔋 What should you do with a swollen or damaged robot battery? (a) charge it again (b) throw it in a fire (c) squeeze it flat (d) give it to an adult
  35. 35.🔋 A robot uses 25% of its battery every 5 minutes. How many minutes does a full battery (100%) last?
  36. 36.🔋 A robot’s battery holds 800 mAh and the robot uses 200 mA. For how many hours can it run?
  37. 37.🔋 A robot uses 25% of its battery every 3 minutes. How many minutes does a full battery (100%) last?
  38. 38.🔋 A robot’s battery holds 1600 mAh and the robot uses 200 mA. For how many hours can it run?
  39. 39.🔋 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%?
  40. 40.🔋 What does a robot vacuum do when its battery is low? (a) keeps going for ever (b) goes back to its dock (c) turns into a car (d) explodes

Answer key

  1. 14
  2. 80
  3. 3
  4. 250
  5. 4
  6. 4
  7. 2
  8. 8
  9. 2
  10. 5
  11. 12
  12. 10
  13. 20
  14. 7.5
  15. 4
  16. 3
  17. sunlight (solar panels)
  18. 5
  19. 3
  20. 30
  21. 130
  22. 80
  23. 19
  24. 20
  25. 7
  26. a power cable
  27. a rechargeable battery
  28. 20
  29. 40
  30. 40
  31. 40
  32. 9
  33. 10.5
  34. give it to an adult
  35. 20
  36. 4
  37. 12
  38. 8
  39. 15
  40. goes back to its dock

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