← Power for robots lesson New set →

Robotics Worksheet: Robot Batteries

Robotics lesson 4: Power for robots · Set 704 · 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 arm bolted to a factory floor usually gets its power from … (a) a wind-up key (b) a power cable (c) a solar panel (d) a coin cell
  2. 2.🔋 A robot’s battery holds 1000 mAh and the robot uses 1000 mA. For how many hours can it run?
  3. 3.🔋 A robot uses 25% of its battery every 3 minutes. How many minutes does a full battery (100%) last?
  4. 4.🔋 A robot’s battery is at 20% and charging adds 10% every 10 minutes. How many minutes until it is full (100%)?
  5. 5.🔋 A robot uses 20% of its battery every 4 minutes. How many minutes does a full battery (100%) last?
  6. 6.🔋 A robot’s battery holds 200 mAh and the robot uses 100 mA. For how many hours can it run?
  7. 7.🔋 A robot’s battery holds 5000 mAh and the robot uses 1000 mA. For how many hours can it run?
  8. 8.🔋 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%?
  9. 9.🔋 A robot runs on 5 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  10. 10.🔋 A robot’s battery is at 20% and charging adds 20% every 10 minutes. How many minutes until it is full (100%)?
  11. 11.🔋 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%?
  12. 12.🔋 A robot uses 25% of its battery every 5 minutes. How many minutes does a full battery (100%) last?
  13. 13.🔋 A robot uses 5% of its battery every 6 minutes. How many minutes does a full battery (100%) last?
  14. 14.🔋 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%?
  15. 15.🔋 A robot runs on 2 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  16. 16.🔋 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%?
  17. 17.🔋 A robot uses 25% of its battery every 1 minute. How many minutes does a full battery (100%) last?
  18. 18.🔋 A robot uses 20% of its battery every 6 minutes. How many minutes does a full battery (100%) last?
  19. 19.🔋 A robot’s battery is at 50% and charging adds 25% every 10 minutes. How many minutes until it is full (100%)?
  20. 20.🔋 A robot runs on 4 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  21. 21.🔋 A robot’s battery is at 0% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  22. 22.🔋 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%?
  23. 23.🔋 A robot uses 2% of its battery every 1 minute. How many minutes does a full battery (100%) last?
  24. 24.🔋 Many robots on far-away planets get energy from … (a) wind-up keys (b) petrol pumps (c) shop batteries (d) sunlight (solar panels)
  25. 25.🔋 What powers most moving robots? (a) a candle (b) a rechargeable battery (c) a tiny magnet (d) a water tank
  26. 26.🔋 What should you do with a swollen or damaged robot battery? (a) give it to an adult (b) squeeze it flat (c) charge it again (d) throw it in a fire
  27. 27.🔋 A robot’s battery holds 200 mAh and the robot uses 200 mA. For how many hours can it run?
  28. 28.🔋 A robot’s battery holds 1400 mAh and the robot uses 200 mA. For how many hours can it run?
  29. 29.🔋 A robot runs on 6 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  30. 30.🔋 A robot’s battery is at 25% and charging adds 25% every 10 minutes. How many minutes until it is full (100%)?
  31. 31.🔋 A robot’s battery holds 2000 mAh and the robot uses 400 mA. For how many hours can it run?
  32. 32.🔋 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%?
  33. 33.🔋 A robot’s battery is at 0% and charging adds 25% every 10 minutes. How many minutes until it is full (100%)?
  34. 34.🔋 A robot’s battery holds 4000 mAh and the robot uses 1000 mA. For how many hours can it run?
  35. 35.🔋 A robot’s battery is at 50% and charging adds 10% every 10 minutes. How many minutes until it is full (100%)?
  36. 36.🔋 A robot runs on 3 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  37. 37.🔋 A robot’s battery is at 25% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  38. 38.🔋 Battery capacity (how much it holds) is often written in … (a) °C (b) mAh (c) km (d) kg
  39. 39.🔋 A robot’s battery is at 70% and charging adds 10% every 10 minutes. How many minutes until it is full (100%)?
  40. 40.🔋 A robot’s battery is at 15%. Each lap of the track uses 5%. How many laps can it do before the battery reaches 0%?

Answer key

  1. a power cable
  2. 1
  3. 12
  4. 80
  5. 20
  6. 2
  7. 5
  8. 2
  9. 7.5
  10. 40
  11. 3
  12. 20
  13. 120
  14. 16
  15. 3
  16. 3
  17. 4
  18. 30
  19. 20
  20. 6
  21. 200
  22. 4
  23. 50
  24. sunlight (solar panels)
  25. a rechargeable battery
  26. give it to an adult
  27. 1
  28. 7
  29. 9
  30. 30
  31. 5
  32. 2
  33. 40
  34. 4
  35. 50
  36. 4.5
  37. 150
  38. mAh
  39. 30
  40. 3

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