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Robotics Worksheet: Robot Batteries

Robotics lesson 4: Power for robots · Set 821 · 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 100%. Each lap of the track uses 5%. How many laps can it do before the battery reaches 0%?
  3. 3.🔋 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
  4. 4.🔋 A robot uses 20% of its battery every 3 minutes. How many minutes does a full battery (100%) last?
  5. 5.🔋 A robot’s battery holds 200 mAh and the robot uses 200 mA. For how many hours can it run?
  6. 6.🔋 A robot’s battery holds 2000 mAh and the robot uses 500 mA. For how many hours can it run?
  7. 7.🔋 A robot’s battery holds 400 mAh and the robot uses 100 mA. For how many hours can it run?
  8. 8.🔋 A robot’s battery holds 300 mAh and the robot uses 100 mA. For how many hours can it run?
  9. 9.🔋 A robot’s battery holds 1000 mAh and the robot uses 500 mA. For how many hours can it run?
  10. 10.🔋 A robot uses 20% of its battery every 2 minutes. How many minutes does a full battery (100%) last?
  11. 11.🔋 What should you do with a swollen or damaged robot battery? (a) give it to an adult (b) charge it again (c) throw it in a fire (d) squeeze it flat
  12. 12.🔋 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%?
  13. 13.🔋 A robot uses 4% of its battery every 3 minutes. How many minutes does a full battery (100%) last?
  14. 14.🔋 A robot’s battery holds 3200 mAh and the robot uses 400 mA. For how many hours can it run?
  15. 15.🔋 A robot’s battery is at 70%. Each lap of the track uses 5%. How many laps can it do before the battery reaches 0%?
  16. 16.🔋 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
  17. 17.🔋 Many robots on far-away planets get energy from … (a) wind-up keys (b) sunlight (solar panels) (c) petrol pumps (d) shop batteries
  18. 18.🔋 A robot’s battery holds 1200 mAh and the robot uses 200 mA. For how many hours can it run?
  19. 19.🔋 What powers most moving robots? (a) a rechargeable battery (b) a tiny magnet (c) a water tank (d) a candle
  20. 20.🔋 A robot runs on 8 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  21. 21.🔋 A robot’s battery holds 1400 mAh and the robot uses 200 mA. For how many hours can it run?
  22. 22.🔋 A robot uses 5% of its battery every 6 minutes. How many minutes does a full battery (100%) last?
  23. 23.🔋 A robot’s battery holds 800 mAh and the robot uses 200 mA. For how many hours can it run?
  24. 24.🔋 Battery capacity (how much it holds) is often written in … (a) kg (b) mAh (c) km (d) °C
  25. 25.🔋 A robot runs on 4 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  26. 26.🔋 A robot’s battery is at 70% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  27. 27.🔋 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%?
  28. 28.🔋 A robot runs on 2 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  29. 29.🔋 A robot’s battery holds 400 mAh and the robot uses 400 mA. For how many hours can it run?
  30. 30.🔋 A robot uses 25% of its battery every 2 minutes. How many minutes does a full battery (100%) last?
  31. 31.🔋 A robot’s battery holds 500 mAh and the robot uses 100 mA. For how many hours can it run?
  32. 32.🔋 A robot uses 2% of its battery every 3 minutes. How many minutes does a full battery (100%) last?
  33. 33.🔋 A robot runs on 6 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  34. 34.🔋 A robot’s battery is at 50%. Each lap of the track uses 5%. How many laps can it do before the battery reaches 0%?
  35. 35.🔋 A robot uses 2% of its battery every 2 minutes. How many minutes does a full battery (100%) last?
  36. 36.🔋 A robot’s battery holds 7000 mAh and the robot uses 1000 mA. For how many hours can it run?
  37. 37.🔋 A robot’s battery is at 35%. Each lap of the track uses 5%. How many laps can it do before the battery reaches 0%?
  38. 38.🔋 A robot’s battery is at 75% and charging adds 25% every 10 minutes. How many minutes until it is full (100%)?
  39. 39.🔋 A robot’s battery is at 25% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  40. 40.🔋 A robot’s battery holds 800 mAh and the robot uses 100 mA. For how many hours can it run?

Answer key

  1. 10.5
  2. 20
  3. goes back to its dock
  4. 15
  5. 1
  6. 4
  7. 4
  8. 3
  9. 2
  10. 10
  11. give it to an adult
  12. 2
  13. 75
  14. 8
  15. 14
  16. a power cable
  17. sunlight (solar panels)
  18. 6
  19. a rechargeable battery
  20. 12
  21. 7
  22. 120
  23. 4
  24. mAh
  25. 6
  26. 60
  27. 4
  28. 3
  29. 1
  30. 8
  31. 5
  32. 150
  33. 9
  34. 10
  35. 100
  36. 7
  37. 7
  38. 10
  39. 150
  40. 8

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