← Power for robots lesson New set →

Robotics Worksheet: Robot Batteries

Robotics lesson 4: Power for robots · Set 72 · 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 85% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  2. 2.🔋 What should you do with a swollen or damaged robot battery? (a) throw it in a fire (b) charge it again (c) give it to an adult (d) squeeze it flat
  3. 3.🔋 A robot’s battery holds 6000 mAh and the robot uses 1000 mA. For how many hours can it run?
  4. 4.🔋 A robot’s battery is at 25% and charging adds 25% every 10 minutes. How many minutes until it is full (100%)?
  5. 5.🔋 A robot runs on 7 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  6. 6.🔋 A robot’s battery is at 60% and charging adds 10% every 10 minutes. How many minutes until it is full (100%)?
  7. 7.🔋 A robot uses 2% of its battery every 3 minutes. How many minutes does a full battery (100%) last?
  8. 8.🔋 A robot’s battery is at 5% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  9. 9.🔋 A robot’s battery is at 10% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  10. 10.🔋 A robot runs on 5 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  11. 11.🔋 A robot’s battery holds 1200 mAh and the robot uses 200 mA. For how many hours can it run?
  12. 12.🔋 A robot’s battery is at 30%. Each lap of the track uses 10%. How many laps can it do before the battery reaches 0%?
  13. 13.🔋 A robot’s battery holds 1400 mAh and the robot uses 200 mA. For how many hours can it run?
  14. 14.🔋 A robot’s battery is at 50%. Each lap of the track uses 10%. How many laps can it do before the battery reaches 0%?
  15. 15.🔋 A robot’s battery is at 0% and charging adds 25% every 10 minutes. How many minutes until it is full (100%)?
  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.🔋 Many robots on far-away planets get energy from … (a) petrol pumps (b) sunlight (solar panels) (c) shop batteries (d) wind-up keys
  18. 18.🔋 What powers most moving robots? (a) a water tank (b) a rechargeable battery (c) a tiny magnet (d) a candle
  19. 19.🔋 A robot uses 25% of its battery every 2 minutes. How many minutes does a full battery (100%) last?
  20. 20.🔋 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%?
  21. 21.🔋 A robot’s battery is at 75% and charging adds 25% every 10 minutes. How many minutes until it is full (100%)?
  22. 22.🔋 A robot’s battery is at 50% and charging adds 25% every 10 minutes. How many minutes until it is full (100%)?
  23. 23.🔋 A robot’s battery holds 1000 mAh and the robot uses 200 mA. For how many hours can it run?
  24. 24.🔋 A robot uses 2% of its battery every 6 minutes. How many minutes does a full battery (100%) last?
  25. 25.🔋 A robot’s battery is at 90% and charging adds 10% every 10 minutes. How many minutes until it is full (100%)?
  26. 26.🔋 A robot uses 5% of its battery every 5 minutes. How many minutes does a full battery (100%) last?
  27. 27.🔋 A robot runs on 3 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  28. 28.🔋 A robot runs on 2 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  29. 29.🔋 A robot arm bolted to a factory floor usually gets its power from … (a) a power cable (b) a solar panel (c) a wind-up key (d) a coin cell
  30. 30.🔋 A robot’s battery is at 70% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  31. 31.🔋 A robot’s battery holds 700 mAh and the robot uses 100 mA. For how many hours can it run?
  32. 32.🔋 A robot uses 10% of its battery every 5 minutes. How many minutes does a full battery (100%) last?
  33. 33.🔋 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%?
  34. 34.🔋 A robot uses 5% of its battery every 4 minutes. How many minutes does a full battery (100%) last?
  35. 35.🔋 A robot’s battery is at 70% and charging adds 10% every 10 minutes. How many minutes until it is full (100%)?
  36. 36.🔋 What does a robot vacuum do when its battery is low? (a) explodes (b) keeps going for ever (c) turns into a car (d) goes back to its dock
  37. 37.🔋 A robot uses 4% of its battery every 4 minutes. How many minutes does a full battery (100%) last?
  38. 38.🔋 A robot’s battery holds 400 mAh and the robot uses 400 mA. For how many hours can it run?
  39. 39.🔋 A robot uses 5% of its battery every 3 minutes. How many minutes does a full battery (100%) last?
  40. 40.🔋 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%?

Answer key

  1. 30
  2. give it to an adult
  3. 6
  4. 30
  5. 10.5
  6. 40
  7. 150
  8. 190
  9. 180
  10. 7.5
  11. 6
  12. 3
  13. 7
  14. 5
  15. 40
  16. 3
  17. sunlight (solar panels)
  18. a rechargeable battery
  19. 8
  20. 15
  21. 10
  22. 20
  23. 5
  24. 300
  25. 10
  26. 100
  27. 4.5
  28. 3
  29. a power cable
  30. 60
  31. 7
  32. 50
  33. 16
  34. 80
  35. 30
  36. goes back to its dock
  37. 100
  38. 1
  39. 60
  40. 2

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