← Power for robots lesson New set →

Robotics Worksheet: Robot Batteries

Robotics lesson 4: Power for robots · Set 347 · 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 90% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  2. 2.🔋 Battery capacity (how much it holds) is often written in … (a) kg (b) °C (c) mAh (d) km
  3. 3.🔋 A robot’s battery is at 50% and charging adds 25% every 10 minutes. How many minutes until it is full (100%)?
  4. 4.🔋 A robot arm bolted to a factory floor usually gets its power from … (a) a solar panel (b) a wind-up key (c) a coin cell (d) a power cable
  5. 5.🔋 A robot’s battery is at 5% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  6. 6.🔋 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%?
  7. 7.🔋 A robot runs on 3 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  8. 8.🔋 A robot uses 20% of its battery every 4 minutes. How many minutes does a full battery (100%) last?
  9. 9.🔋 A robot uses 10% of its battery every 6 minutes. How many minutes does a full battery (100%) last?
  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 uses 10% of its battery every 3 minutes. How many minutes does a full battery (100%) last?
  12. 12.🔋 A robot runs on 8 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  13. 13.🔋 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%?
  14. 14.🔋 A robot uses 20% of its battery every 2 minutes. How many minutes does a full battery (100%) last?
  15. 15.🔋 A robot uses 5% of its battery every 4 minutes. How many minutes does a full battery (100%) last?
  16. 16.🔋 A robot’s battery is at 60% and charging adds 20% every 10 minutes. How many minutes until it is full (100%)?
  17. 17.🔋 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%?
  18. 18.🔋 A robot’s battery is at 40%. Each lap of the track uses 20%. How many laps can it do before the battery reaches 0%?
  19. 19.🔋 A robot runs on 2 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  20. 20.🔋 A robot uses 4% of its battery every 6 minutes. How many minutes does a full battery (100%) last?
  21. 21.🔋 Many robots on far-away planets get energy from … (a) wind-up keys (b) shop batteries (c) petrol pumps (d) sunlight (solar panels)
  22. 22.🔋 A robot uses 2% of its battery every 5 minutes. How many minutes does a full battery (100%) last?
  23. 23.🔋 A robot uses 5% of its battery every 3 minutes. How many minutes does a full battery (100%) last?
  24. 24.🔋 A robot uses 2% of its battery every 1 minute. How many minutes does a full battery (100%) last?
  25. 25.🔋 A robot’s battery holds 2000 mAh and the robot uses 250 mA. For how many hours can it run?
  26. 26.🔋 A robot’s battery is at 0% and charging adds 10% every 10 minutes. How many minutes until it is full (100%)?
  27. 27.🔋 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%?
  28. 28.🔋 A robot uses 25% of its battery every 1 minute. How many minutes does a full battery (100%) last?
  29. 29.🔋 A robot’s battery holds 1250 mAh and the robot uses 250 mA. For how many hours can it run?
  30. 30.🔋 A robot runs on 7 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  31. 31.🔋 A robot’s battery holds 600 mAh and the robot uses 100 mA. For how many hours can it run?
  32. 32.🔋 What does a robot vacuum do when its battery is low? (a) goes back to its dock (b) explodes (c) keeps going for ever (d) turns into a car
  33. 33.🔋 A robot’s battery holds 100 mAh and the robot uses 100 mA. For how many hours can it run?
  34. 34.🔋 A robot’s battery is at 85% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  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’s battery holds 1600 mAh and the robot uses 200 mA. For how many hours can it run?
  37. 37.🔋 A robot uses 4% of its battery every 2 minutes. How many minutes does a full battery (100%) last?
  38. 38.🔋 A robot’s battery holds 500 mAh and the robot uses 100 mA. For how many hours can it run?
  39. 39.🔋 A robot’s battery holds 1200 mAh and the robot uses 400 mA. For how many hours can it run?
  40. 40.🔋 A robot’s battery holds 1000 mAh and the robot uses 500 mA. For how many hours can it run?

Answer key

  1. 20
  2. mAh
  3. 20
  4. a power cable
  5. 190
  6. 15
  7. 4.5
  8. 20
  9. 60
  10. 7.5
  11. 30
  12. 12
  13. 2
  14. 10
  15. 80
  16. 20
  17. 3
  18. 2
  19. 3
  20. 150
  21. sunlight (solar panels)
  22. 250
  23. 60
  24. 50
  25. 8
  26. 100
  27. 4
  28. 4
  29. 5
  30. 10.5
  31. 6
  32. goes back to its dock
  33. 1
  34. 30
  35. 50
  36. 8
  37. 50
  38. 5
  39. 3
  40. 2

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