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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 462 · 40 questions
TalentJR

Remember (One part, one job): Resistor: limits current. Capacitor: stores a little charge. Diode: one way only. LED: one way and glows. Buzzer: sound. Motor: spinning. Potentiometer: a knob that changes resistance. LDR: light sensor. Thermistor: heat sensor. Fuse: protects by blowing. Transistor: boosts or switches.

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  1. 1.True or false: a motor makes things spin. (a) True (b) False
  2. 2.🧩 Which component senses how hot it is? (a) motor (b) capacitor (c) thermistor (d) LED
  3. 3.🧩 Which component limits the current? (a) thermistor (b) LED (c) resistor (d) LDR
  4. 4.True or false: a fuse turns a fan or wheels. (a) True (b) False
  5. 5.True or false: an LDR senses how bright it is. (a) True (b) False
  6. 6.True or false: a fuse limits the current. (a) True (b) False
  7. 7.🧩 A capacitor in a circuit can … (a) make light (b) spin a wheel (c) measure heat (d) store charge briefly
  8. 8.🧩 Which component makes things spin? (a) motor (b) buzzer (c) LED (d) transistor
  9. 9.What does a buzzer do? (a) boosts a small signal (b) has coloured bands (c) makes a beeping sound (d) senses how bright it is
  10. 10.True or false: a potentiometer is a resistance knob. (a) False (b) True
  11. 11.🧩 Which component stores a little charge? (a) thermistor (b) capacitor (c) motor (d) buzzer
  12. 12.What does a diode do? (a) has coloured bands (b) lets current go one way (c) makes things spin (d) smooths a wobbly supply
  13. 13.🧩 Which component beeps for an alarm? (a) LED (b) capacitor (c) motor (d) buzzer
  14. 14.🧩 Which component smooths a wobbly supply? (a) capacitor (b) LDR (c) LED (d) resistor
  15. 15.True or false: an LDR turns a fan or wheels. (a) True (b) False
  16. 16.True or false: an LED limits the current. (a) True (b) False
  17. 17.What does an LED do? (a) glows using little power (b) smooths a wobbly supply (c) stores a little charge (d) lets current go one way
  18. 18.True or false: a buzzer senses how bright it is. (a) True (b) False
  19. 19.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a buzzer (c) a capacitor (d) a diode
  20. 20.What does a capacitor do? (a) makes a beeping sound (b) limits the current (c) beeps for an alarm (d) stores a little charge
  21. 21.True or false: a motor makes a beeping sound. (a) True (b) False
  22. 22.🧩 Which part changes electrical energy into movement? (a) a motor (b) an LED (c) a fuse (d) a resistor
  23. 23.What does a thermistor do? (a) senses how hot it is (b) stores a little charge (c) glows using little power (d) has coloured bands
  24. 24.🧩 Which component lets current go one way? (a) buzzer (b) transistor (c) diode (d) thermistor
  25. 25.🧩 Which component glows using little power? (a) thermistor (b) LED (c) diode (d) motor
  26. 26.What does a transistor do? (a) makes a beeping sound (b) has coloured bands (c) lets current go one way (d) boosts a small signal
  27. 27.What does an LDR do? (a) makes things spin (b) boosts a small signal (c) lets current go one way (d) senses how bright it is
  28. 28.What does a resistor do? (a) senses how bright it is (b) limits the current (c) is a resistance knob (d) lets current go one way
  29. 29.True or false: a buzzer has coloured bands. (a) True (b) False
  30. 30.True or false: an LED beeps for an alarm. (a) False (b) True
  31. 31.True or false: a resistor stores a little charge. (a) False (b) True
  32. 32.🧩 Which component senses how bright it is? (a) fuse (b) LDR (c) motor (d) potentiometer
  33. 33.True or false: a transistor limits the current. (a) False (b) True
  34. 34.What does a buzzer do? (a) is a resistance knob (b) beeps for an alarm (c) limits the current (d) blows if current is high
  35. 35.True or false: a capacitor senses how bright it is. (a) False (b) True
  36. 36.True or false: a capacitor stores a little charge. (a) False (b) True
  37. 37.🧩 Which component makes a beeping sound? (a) buzzer (b) motor (c) fuse (d) diode
  38. 38.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
  39. 39.True or false: an LDR makes things spin. (a) False (b) True
  40. 40.True or false: an LED senses how bright it is. (a) True (b) False

Answer key

  1. True
  2. thermistor
  3. resistor
  4. False
  5. True
  6. False
  7. store charge briefly
  8. motor
  9. makes a beeping sound
  10. True
  11. capacitor
  12. lets current go one way
  13. buzzer
  14. capacitor
  15. False
  16. False
  17. glows using little power
  18. False
  19. a buzzer
  20. stores a little charge
  21. False
  22. a motor
  23. senses how hot it is
  24. diode
  25. LED
  26. boosts a small signal
  27. senses how bright it is
  28. limits the current
  29. False
  30. False
  31. False
  32. LDR
  33. False
  34. beeps for an alarm
  35. False
  36. True
  37. buzzer
  38. True
  39. False
  40. False

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