← Power for robots lesson New set →

Robotics Worksheet: Robot Batteries

Robotics lesson 4: Power for robots · Set 501 · 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 75%. Each lap of the track uses 25%. How many laps can it do before the battery reaches 0%?
  2. 2.🔋 A robot’s battery holds 1000 mAh and the robot uses 250 mA. For how many hours can it run?
  3. 3.🔋 What should you do with a swollen or damaged robot battery? (a) give it to an adult (b) throw it in a fire (c) charge it again (d) squeeze it flat
  4. 4.🔋 A robot’s battery holds 2400 mAh and the robot uses 400 mA. For how many hours can it run?
  5. 5.🔋 A robot’s battery is at 25% and charging adds 25% every 10 minutes. How many minutes until it is full (100%)?
  6. 6.🔋 A robot runs on 5 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  7. 7.🔋 A robot’s battery is at 70% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  8. 8.🔋 A robot’s battery is at 90% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  9. 9.🔋 A robot uses 5% of its battery every 5 minutes. How many minutes does a full battery (100%) last?
  10. 10.🔋 A robot’s battery holds 2500 mAh and the robot uses 500 mA. For how many hours can it run?
  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’s battery holds 400 mAh and the robot uses 200 mA. For how many hours can it run?
  13. 13.🔋 A robot arm bolted to a factory floor usually gets its power from … (a) a coin cell (b) a power cable (c) a solar panel (d) a wind-up key
  14. 14.🔋 A robot uses 4% of its battery every 5 minutes. How many minutes does a full battery (100%) last?
  15. 15.🔋 A robot uses 2% of its battery every 3 minutes. How many minutes does a full battery (100%) last?
  16. 16.🔋 A robot uses 4% of its battery every 6 minutes. How many minutes does a full battery (100%) last?
  17. 17.🔋 A robot runs on 3 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  18. 18.🔋 A robot’s battery holds 300 mAh and the robot uses 100 mA. For how many hours can it run?
  19. 19.🔋 A robot’s battery is at 80% and charging adds 10% every 10 minutes. How many minutes until it is full (100%)?
  20. 20.🔋 A robot’s battery holds 2000 mAh and the robot uses 500 mA. For how many hours can it run?
  21. 21.🔋 A robot’s battery holds 2800 mAh and the robot uses 400 mA. For how many hours can it run?
  22. 22.🔋 A robot’s battery is at 100%. Each lap of the track uses 5%. How many laps can it do before the battery reaches 0%?
  23. 23.🔋 A robot uses 25% of its battery every 5 minutes. How many minutes does a full battery (100%) last?
  24. 24.🔋 A robot’s battery is at 50% and charging adds 25% every 10 minutes. How many minutes until it is full (100%)?
  25. 25.🔋 A robot’s battery holds 600 mAh and the robot uses 200 mA. For how many hours can it run?
  26. 26.🔋 A robot’s battery holds 700 mAh and the robot uses 100 mA. For how many hours can it run?
  27. 27.🔋 A robot’s battery is at 20% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  28. 28.🔋 A robot’s battery holds 6000 mAh and the robot uses 1000 mA. For how many hours can it run?
  29. 29.🔋 A robot’s battery holds 3000 mAh and the robot uses 1000 mA. For how many hours can it run?
  30. 30.🔋 Battery capacity (how much it holds) is often written in … (a) °C (b) kg (c) mAh (d) km
  31. 31.🔋 A robot uses 25% of its battery every 2 minutes. How many minutes does a full battery (100%) last?
  32. 32.🔋 A robot runs on 8 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  33. 33.🔋 A robot uses 5% of its battery every 6 minutes. How many minutes does a full battery (100%) last?
  34. 34.🔋 A robot uses 5% of its battery every 2 minutes. How many minutes does a full battery (100%) last?
  35. 35.🔋 Many robots on far-away planets get energy from … (a) wind-up keys (b) petrol pumps (c) sunlight (solar panels) (d) shop batteries
  36. 36.🔋 A robot’s battery is at 0% and charging adds 25% every 10 minutes. How many minutes until it is full (100%)?
  37. 37.🔋 A robot’s battery holds 100 mAh and the robot uses 100 mA. For how many hours can it run?
  38. 38.🔋 A robot’s battery is at 40% and charging adds 20% every 10 minutes. How many minutes until it is full (100%)?
  39. 39.🔋 A robot uses 4% of its battery every 2 minutes. How many minutes does a full battery (100%) last?
  40. 40.🔋 A robot’s battery holds 8000 mAh and the robot uses 1000 mA. For how many hours can it run?

Answer key

  1. 3
  2. 4
  3. give it to an adult
  4. 6
  5. 30
  6. 7.5
  7. 60
  8. 20
  9. 100
  10. 5
  11. 3
  12. 2
  13. a power cable
  14. 125
  15. 150
  16. 150
  17. 4.5
  18. 3
  19. 20
  20. 4
  21. 7
  22. 20
  23. 20
  24. 20
  25. 3
  26. 7
  27. 160
  28. 6
  29. 3
  30. mAh
  31. 8
  32. 12
  33. 120
  34. 40
  35. sunlight (solar panels)
  36. 40
  37. 1
  38. 30
  39. 50
  40. 8

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