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Robotics Worksheet: Robot Batteries

Robotics lesson 4: Power for robots · Set 951 · 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 holds 1200 mAh and the robot uses 400 mA. For how many hours can it run?
  2. 2.🔋 A robot uses 10% of its battery every 4 minutes. How many minutes does a full battery (100%) last?
  3. 3.🔋 A robot runs on 5 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  4. 4.🔋 Battery capacity (how much it holds) is often written in … (a) mAh (b) kg (c) °C (d) km
  5. 5.🔋 A robot’s battery holds 250 mAh and the robot uses 250 mA. For how many hours can it run?
  6. 6.🔋 What should you do with a swollen or damaged robot battery? (a) throw it in a fire (b) squeeze it flat (c) give it to an adult (d) charge it again
  7. 7.🔋 A robot runs on 2 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  8. 8.🔋 A robot’s battery holds 200 mAh and the robot uses 200 mA. For how many hours can it run?
  9. 9.🔋 A robot’s battery is at 0% and charging adds 25% every 10 minutes. How many minutes until it is full (100%)?
  10. 10.🔋 A robot uses 2% of its battery every 2 minutes. How many minutes does a full battery (100%) last?
  11. 11.🔋 A robot uses 4% of its battery every 4 minutes. How many minutes does a full battery (100%) last?
  12. 12.🔋 A robot uses 10% of its battery every 1 minute. How many minutes does a full battery (100%) last?
  13. 13.🔋 A robot uses 2% of its battery every 4 minutes. How many minutes does a full battery (100%) last?
  14. 14.🔋 A robot’s battery is at 45% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  15. 15.🔋 A robot runs on 3 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  16. 16.🔋 A robot’s battery holds 1400 mAh and the robot uses 200 mA. For how many hours can it run?
  17. 17.🔋 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%?
  18. 18.🔋 A robot’s battery is at 60%. Each lap of the track uses 10%. How many laps can it do before the battery reaches 0%?
  19. 19.🔋 A robot’s battery is at 75% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  20. 20.🔋 A robot’s battery is at 90% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  21. 21.🔋 A robot runs on 4 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  22. 22.🔋 A robot’s battery is at 100%. Each lap of the track uses 10%. How many laps can it do before the battery reaches 0%?
  23. 23.🔋 Many robots on far-away planets get energy from … (a) petrol pumps (b) wind-up keys (c) shop batteries (d) sunlight (solar panels)
  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 is at 80% and charging adds 20% every 10 minutes. How many minutes until it is full (100%)?
  26. 26.🔋 A robot’s battery holds 100 mAh and the robot uses 100 mA. For how many hours can it run?
  27. 27.🔋 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%?
  28. 28.🔋 A robot’s battery is at 95%. Each lap of the track uses 5%. How many laps can it do before the battery reaches 0%?
  29. 29.🔋 A robot runs on 7 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  30. 30.🔋 A robot’s battery holds 2000 mAh and the robot uses 1000 mA. For how many hours can it run?
  31. 31.🔋 A robot’s battery holds 1000 mAh and the robot uses 1000 mA. For how many hours can it run?
  32. 32.🔋 A robot’s battery is at 60% and charging adds 20% every 10 minutes. How many minutes until it is full (100%)?
  33. 33.🔋 A robot uses 4% of its battery every 1 minute. How many minutes does a full battery (100%) last?
  34. 34.🔋 A robot uses 20% of its battery every 1 minute. How many minutes does a full battery (100%) last?
  35. 35.🔋 A robot’s battery holds 1200 mAh and the robot uses 200 mA. For how many hours can it run?
  36. 36.🔋 What powers most moving robots? (a) a water tank (b) a candle (c) a tiny magnet (d) a rechargeable battery
  37. 37.🔋 A robot’s battery holds 700 mAh and the robot uses 100 mA. For how many hours can it run?
  38. 38.🔋 A robot uses 2% of its battery every 3 minutes. How many minutes does a full battery (100%) last?
  39. 39.🔋 A robot’s battery holds 400 mAh and the robot uses 200 mA. For how many hours can it run?
  40. 40.🔋 A robot uses 20% of its battery every 3 minutes. How many minutes does a full battery (100%) last?

Answer key

  1. 3
  2. 40
  3. 7.5
  4. mAh
  5. 1
  6. give it to an adult
  7. 3
  8. 1
  9. 40
  10. 100
  11. 100
  12. 10
  13. 200
  14. 110
  15. 4.5
  16. 7
  17. 9
  18. 6
  19. 50
  20. 20
  21. 6
  22. 10
  23. sunlight (solar panels)
  24. 50
  25. 10
  26. 1
  27. 3
  28. 19
  29. 10.5
  30. 2
  31. 1
  32. 20
  33. 25
  34. 5
  35. 6
  36. a rechargeable battery
  37. 7
  38. 150
  39. 2
  40. 15

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