← Power for robots lesson New set →

Robotics Worksheet: Robot Batteries

Robotics lesson 4: Power for robots · Set 228 · 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 runs on 7 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  2. 2.🔋 A robot’s battery is at 65% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  3. 3.🔋 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%?
  4. 4.🔋 A robot runs on 2 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  5. 5.🔋 A robot’s battery holds 1000 mAh and the robot uses 250 mA. For how many hours can it run?
  6. 6.🔋 A robot uses 5% of its battery every 2 minutes. How many minutes does a full battery (100%) last?
  7. 7.🔋 A robot’s battery holds 1200 mAh and the robot uses 200 mA. For how many hours can it run?
  8. 8.🔋 A robot uses 4% of its battery every 3 minutes. How many minutes does a full battery (100%) last?
  9. 9.🔋 A robot’s battery holds 1600 mAh and the robot uses 200 mA. For how many hours can it run?
  10. 10.🔋 A robot runs on 3 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  11. 11.🔋 A robot uses 4% of its battery every 5 minutes. How many minutes does a full battery (100%) last?
  12. 12.🔋 A robot arm bolted to a factory floor usually gets its power from … (a) a coin cell (b) a solar panel (c) a wind-up key (d) a power cable
  13. 13.🔋 Many robots on far-away planets get energy from … (a) petrol pumps (b) wind-up keys (c) shop batteries (d) sunlight (solar panels)
  14. 14.🔋 A robot’s battery is at 60%. Each lap of the track uses 5%. How many laps can it do before the battery reaches 0%?
  15. 15.🔋 A robot’s battery is at 60% and charging adds 20% every 10 minutes. How many minutes until it is full (100%)?
  16. 16.🔋 A robot runs on 4 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  17. 17.🔋 A robot’s battery is at 75% and charging adds 25% every 10 minutes. How many minutes until it is full (100%)?
  18. 18.🔋 A robot’s battery holds 1000 mAh and the robot uses 200 mA. For how many hours can it run?
  19. 19.🔋 A robot’s battery holds 200 mAh and the robot uses 200 mA. For how many hours can it run?
  20. 20.🔋 A robot uses 4% of its battery every 2 minutes. How many minutes does a full battery (100%) last?
  21. 21.🔋 A robot’s battery holds 5000 mAh and the robot uses 1000 mA. For how many hours can it run?
  22. 22.🔋 A robot uses 25% of its battery every 5 minutes. How many minutes does a full battery (100%) last?
  23. 23.🔋 A robot uses 20% of its battery every 4 minutes. How many minutes does a full battery (100%) last?
  24. 24.🔋 A robot’s battery holds 700 mAh and the robot uses 100 mA. For how many hours can it run?
  25. 25.🔋 A robot’s battery is at 90%. Each lap of the track uses 10%. How many laps can it do before the battery reaches 0%?
  26. 26.🔋 What should you do with a swollen or damaged robot battery? (a) squeeze it flat (b) charge it again (c) throw it in a fire (d) give it to an adult
  27. 27.🔋 A robot uses 25% of its battery every 1 minute. How many minutes does a full battery (100%) last?
  28. 28.🔋 A robot’s battery holds 8000 mAh and the robot uses 1000 mA. For how many hours can it run?
  29. 29.🔋 A robot uses 25% of its battery every 3 minutes. How many minutes does a full battery (100%) last?
  30. 30.🔋 A robot uses 4% of its battery every 4 minutes. How many minutes does a full battery (100%) last?
  31. 31.🔋 A robot’s battery holds 750 mAh and the robot uses 250 mA. For how many hours can it run?
  32. 32.🔋 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%?
  33. 33.🔋 A robot uses 20% of its battery every 2 minutes. How many minutes does a full battery (100%) last?
  34. 34.🔋 A robot’s battery holds 1250 mAh and the robot uses 250 mA. For how many hours can it run?
  35. 35.🔋 A robot runs on 5 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  36. 36.🔋 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%?
  37. 37.🔋 A robot’s battery holds 1000 mAh and the robot uses 500 mA. For how many hours can it run?
  38. 38.🔋 A robot’s battery holds 2000 mAh and the robot uses 400 mA. For how many hours can it run?
  39. 39.🔋 A robot’s battery is at 20% and charging adds 20% every 10 minutes. How many minutes until it is full (100%)?
  40. 40.🔋 A robot runs on 8 cells of 1.5 V joined in series. What is the total voltage (in volts)? =

Answer key

  1. 10.5
  2. 70
  3. 2
  4. 3
  5. 4
  6. 40
  7. 6
  8. 75
  9. 8
  10. 4.5
  11. 125
  12. a power cable
  13. sunlight (solar panels)
  14. 12
  15. 20
  16. 6
  17. 10
  18. 5
  19. 1
  20. 50
  21. 5
  22. 20
  23. 20
  24. 7
  25. 9
  26. give it to an adult
  27. 4
  28. 8
  29. 12
  30. 100
  31. 3
  32. 3
  33. 10
  34. 5
  35. 7.5
  36. 4
  37. 2
  38. 5
  39. 40
  40. 12

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