← Power for robots lesson New set →

Robotics Worksheet: Robot Batteries

Robotics lesson 4: Power for robots · Set 942 · 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 60% and charging adds 10% every 10 minutes. How many minutes until it is full (100%)?
  2. 2.🔋 A robot runs on 8 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  3. 3.🔋 A robot’s battery holds 1500 mAh and the robot uses 500 mA. For how many hours can it run?
  4. 4.🔋 Battery capacity (how much it holds) is often written in … (a) mAh (b) kg (c) km (d) °C
  5. 5.🔋 A robot’s battery holds 1750 mAh and the robot uses 250 mA. For how many hours can it run?
  6. 6.🔋 A robot’s battery holds 4000 mAh and the robot uses 500 mA. For how many hours can it run?
  7. 7.🔋 A robot’s battery holds 750 mAh and the robot uses 250 mA. For how many hours can it run?
  8. 8.🔋 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
  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’s battery holds 2000 mAh and the robot uses 1000 mA. For how many hours can it run?
  11. 11.🔋 What powers most moving robots? (a) a rechargeable battery (b) a tiny magnet (c) a water tank (d) a candle
  12. 12.🔋 A robot uses 2% of its battery every 3 minutes. How many minutes does a full battery (100%) last?
  13. 13.🔋 Many robots on far-away planets get energy from … (a) wind-up keys (b) shop batteries (c) sunlight (solar panels) (d) petrol pumps
  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’s battery is at 80%. 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 50%. Each lap of the track uses 5%. How many laps can it do before the battery reaches 0%?
  17. 17.🔋 A robot’s battery holds 250 mAh and the robot uses 250 mA. For how many hours can it run?
  18. 18.🔋 A robot’s battery is at 50% and charging adds 25% every 10 minutes. How many minutes until it is full (100%)?
  19. 19.🔋 A robot’s battery is at 90% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  20. 20.🔋 A robot’s battery holds 500 mAh and the robot uses 500 mA. For how many hours can it run?
  21. 21.🔋 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
  22. 22.🔋 A robot’s battery holds 2500 mAh and the robot uses 500 mA. For how many hours can it run?
  23. 23.🔋 A robot runs on 5 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  24. 24.🔋 A robot uses 5% of its battery every 4 minutes. How many minutes does a full battery (100%) last?
  25. 25.🔋 A robot arm bolted to a factory floor usually gets its power from … (a) a coin cell (b) a power cable (c) a wind-up key (d) a solar panel
  26. 26.🔋 A robot’s battery holds 2800 mAh and the robot uses 400 mA. For how many hours can it run?
  27. 27.🔋 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%?
  28. 28.🔋 A robot’s battery holds 1600 mAh and the robot uses 400 mA. For how many hours can it run?
  29. 29.🔋 A robot’s battery is at 30% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  30. 30.🔋 A robot’s battery holds 400 mAh and the robot uses 200 mA. For how many hours can it run?
  31. 31.🔋 A robot’s battery is at 20% and charging adds 10% every 10 minutes. How many minutes until it is full (100%)?
  32. 32.🔋 A robot runs on 2 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  33. 33.🔋 A robot’s battery is at 90%. Each lap of the track uses 5%. How many laps can it do before the battery reaches 0%?
  34. 34.🔋 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%?
  35. 35.🔋 A robot uses 10% of its battery every 2 minutes. How many minutes does a full battery (100%) last?
  36. 36.🔋 A robot uses 10% of its battery every 3 minutes. How many minutes does a full battery (100%) last?
  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 800 mAh and the robot uses 200 mA. For how many hours can it run?
  39. 39.🔋 A robot uses 10% of its battery every 5 minutes. How many minutes does a full battery (100%) last?
  40. 40.🔋 A robot runs on 6 cells of 1.5 V joined in series. What is the total voltage (in volts)? =

Answer key

  1. 40
  2. 12
  3. 3
  4. mAh
  5. 7
  6. 8
  7. 3
  8. give it to an adult
  9. 40
  10. 2
  11. a rechargeable battery
  12. 150
  13. sunlight (solar panels)
  14. 4.5
  15. 16
  16. 10
  17. 1
  18. 20
  19. 20
  20. 1
  21. goes back to its dock
  22. 5
  23. 7.5
  24. 80
  25. a power cable
  26. 7
  27. 2
  28. 4
  29. 140
  30. 2
  31. 80
  32. 3
  33. 18
  34. 2
  35. 20
  36. 30
  37. 12
  38. 4
  39. 50
  40. 9

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