← Power for robots lesson New set →

Robotics Worksheet: Robot Batteries

Robotics lesson 4: Power for robots · Set 124 · 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 uses 20% of its battery every 2 minutes. How many minutes does a full battery (100%) last?
  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 75%. Each lap of the track uses 25%. How many laps can it do before the battery reaches 0%?
  4. 4.🔋 A robot’s battery holds 100 mAh and the robot uses 100 mA. For how many hours can it run?
  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 arm bolted to a factory floor usually gets its power from … (a) a coin cell (b) a solar panel (c) a wind-up key (d) a power cable
  7. 7.🔋 A robot’s battery holds 2000 mAh and the robot uses 400 mA. For how many hours can it run?
  8. 8.🔋 What should you do with a swollen or damaged robot battery? (a) throw it in a fire (b) squeeze it flat (c) give it to an adult (d) charge it again
  9. 9.🔋 A robot’s battery holds 1000 mAh and the robot uses 500 mA. For how many hours can it run?
  10. 10.🔋 Battery capacity (how much it holds) is often written in … (a) °C (b) mAh (c) kg (d) km
  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 70% and charging adds 10% every 10 minutes. How many minutes until it is full (100%)?
  13. 13.🔋 A robot uses 4% of its battery every 2 minutes. 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 is at 25%. Each lap of the track uses 5%. How many laps can it do before the battery reaches 0%?
  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.🔋 What does a robot vacuum do when its battery is low? (a) goes back to its dock (b) keeps going for ever (c) turns into a car (d) explodes
  18. 18.🔋 A robot’s battery holds 3500 mAh and the robot uses 500 mA. For how many hours can it run?
  19. 19.🔋 What powers most moving robots? (a) a rechargeable battery (b) a tiny magnet (c) a water tank (d) a candle
  20. 20.🔋 A robot’s battery is at 50% and charging adds 25% every 10 minutes. How many minutes until it is full (100%)?
  21. 21.🔋 A robot’s battery is at 90% and charging adds 10% every 10 minutes. How many minutes until it is full (100%)?
  22. 22.🔋 A robot uses 10% of its battery every 4 minutes. How many minutes does a full battery (100%) last?
  23. 23.🔋 A robot uses 2% of its battery every 3 minutes. How many minutes does a full battery (100%) last?
  24. 24.🔋 A robot’s battery is at 40% and charging adds 20% every 10 minutes. How many minutes until it is full (100%)?
  25. 25.🔋 Many robots on far-away planets get energy from … (a) sunlight (solar panels) (b) petrol pumps (c) shop batteries (d) wind-up keys
  26. 26.🔋 A robot uses 20% of its battery every 6 minutes. How many minutes does a full battery (100%) last?
  27. 27.🔋 A robot’s battery is at 75% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  28. 28.🔋 A robot runs on 6 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  29. 29.🔋 A robot’s battery holds 2000 mAh and the robot uses 1000 mA. For how many hours can it run?
  30. 30.🔋 A robot uses 10% of its battery every 5 minutes. How many minutes does a full battery (100%) last?
  31. 31.🔋 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%?
  32. 32.🔋 A robot uses 4% of its battery every 4 minutes. How many minutes does a full battery (100%) last?
  33. 33.🔋 A robot uses 4% of its battery every 1 minute. How many minutes does a full battery (100%) last?
  34. 34.🔋 A robot’s battery is at 0% and charging adds 25% every 10 minutes. How many minutes until it is full (100%)?
  35. 35.🔋 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%?
  36. 36.🔋 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%?
  37. 37.🔋 A robot uses 25% of its battery every 4 minutes. How many minutes does a full battery (100%) last?
  38. 38.🔋 A robot’s battery holds 500 mAh and the robot uses 500 mA. For how many hours can it run?
  39. 39.🔋 A robot’s battery is at 65%. Each lap of the track uses 5%. How many laps can it do before the battery reaches 0%?
  40. 40.🔋 A robot’s battery holds 250 mAh and the robot uses 250 mA. For how many hours can it run?

Answer key

  1. 10
  2. 125
  3. 3
  4. 1
  5. 7
  6. a power cable
  7. 5
  8. give it to an adult
  9. 2
  10. mAh
  11. 12
  12. 30
  13. 50
  14. 7.5
  15. 5
  16. 3
  17. goes back to its dock
  18. 7
  19. a rechargeable battery
  20. 20
  21. 10
  22. 40
  23. 150
  24. 30
  25. sunlight (solar panels)
  26. 30
  27. 50
  28. 9
  29. 2
  30. 50
  31. 2
  32. 100
  33. 25
  34. 40
  35. 8
  36. 5
  37. 16
  38. 1
  39. 13
  40. 1

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