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Robotics Worksheet: Robot Batteries

Robotics lesson 4: Power for robots · Set 971 · 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.🔋 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
  2. 2.🔋 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
  3. 3.🔋 What powers most moving robots? (a) a candle (b) a tiny magnet (c) a water tank (d) a rechargeable battery
  4. 4.🔋 A robot’s battery is at 35% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  5. 5.🔋 A robot’s battery is at 25%. Each lap of the track uses 5%. How many laps can it do before the battery reaches 0%?
  6. 6.🔋 A robot’s battery holds 1400 mAh and the robot uses 200 mA. For how many hours can it run?
  7. 7.🔋 A robot’s battery holds 1000 mAh and the robot uses 500 mA. For how many hours can it run?
  8. 8.🔋 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%?
  9. 9.🔋 A robot uses 5% of its battery every 1 minute. 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’s battery is at 25% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  12. 12.🔋 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%?
  13. 13.🔋 A robot’s battery holds 700 mAh and the robot uses 100 mA. For how many hours can it run?
  14. 14.🔋 A robot’s battery holds 1500 mAh and the robot uses 250 mA. For how many hours can it run?
  15. 15.🔋 A robot’s battery is at 50% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  16. 16.🔋 A robot runs on 7 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  17. 17.🔋 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%?
  18. 18.🔋 A robot’s battery holds 200 mAh and the robot uses 200 mA. For how many hours can it run?
  19. 19.🔋 A robot’s battery holds 3200 mAh and the robot uses 400 mA. For how many hours can it run?
  20. 20.🔋 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%?
  21. 21.🔋 A robot’s battery holds 100 mAh and the robot uses 100 mA. For how many hours can it run?
  22. 22.🔋 A robot’s battery holds 1000 mAh and the robot uses 250 mA. For how many hours can it run?
  23. 23.🔋 A robot uses 10% of its battery every 1 minute. How many minutes does a full battery (100%) last?
  24. 24.🔋 A robot’s battery holds 400 mAh and the robot uses 400 mA. For how many hours can it run?
  25. 25.🔋 Battery capacity (how much it holds) is often written in … (a) mAh (b) °C (c) kg (d) km
  26. 26.🔋 A robot uses 25% of its battery every 5 minutes. How many minutes does a full battery (100%) last?
  27. 27.🔋 Many robots on far-away planets get energy from … (a) shop batteries (b) petrol pumps (c) wind-up keys (d) sunlight (solar panels)
  28. 28.🔋 A robot runs on 8 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  29. 29.🔋 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%?
  30. 30.🔋 A robot’s battery holds 4000 mAh and the robot uses 500 mA. For how many hours can it run?
  31. 31.🔋 A robot’s battery holds 800 mAh and the robot uses 200 mA. For how many hours can it run?
  32. 32.🔋 A robot uses 25% of its battery every 4 minutes. How many minutes does a full battery (100%) last?
  33. 33.🔋 A robot runs on 2 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  34. 34.🔋 A robot’s battery is at 50% and charging adds 25% every 10 minutes. How many minutes until it is full (100%)?
  35. 35.🔋 A robot’s battery holds 2000 mAh and the robot uses 500 mA. For how many hours can it run?
  36. 36.🔋 A robot uses 2% of its battery every 2 minutes. How many minutes does a full battery (100%) last?
  37. 37.🔋 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%?
  38. 38.🔋 A robot runs on 3 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  39. 39.🔋 A robot’s battery holds 400 mAh and the robot uses 100 mA. For how many hours can it run?
  40. 40.🔋 A robot’s battery holds 6000 mAh and the robot uses 1000 mA. For how many hours can it run?

Answer key

  1. goes back to its dock
  2. give it to an adult
  3. a rechargeable battery
  4. 130
  5. 5
  6. 7
  7. 2
  8. 2
  9. 20
  10. 7.5
  11. 150
  12. 5
  13. 7
  14. 6
  15. 100
  16. 10.5
  17. 4
  18. 1
  19. 8
  20. 9
  21. 1
  22. 4
  23. 10
  24. 1
  25. mAh
  26. 20
  27. sunlight (solar panels)
  28. 12
  29. 2
  30. 8
  31. 4
  32. 16
  33. 3
  34. 20
  35. 4
  36. 100
  37. 16
  38. 4.5
  39. 4
  40. 6

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