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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 662 · 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.🧩 Which component boosts a small signal? (a) potentiometer (b) buzzer (c) thermistor (d) transistor
  2. 2.🧩 A capacitor in a circuit can … (a) make light (b) measure heat (c) store charge briefly (d) spin a wheel
  3. 3.True or false: a buzzer makes a beeping sound. (a) False (b) True
  4. 4.What does a thermistor do? (a) lets current go one way (b) limits the current (c) blows if current is high (d) senses how hot it is
  5. 5.What does a buzzer do? (a) senses how hot it is (b) lets current go one way (c) beeps for an alarm (d) has coloured bands
  6. 6.True or false: a transistor smooths a wobbly supply. (a) True (b) False
  7. 7.What does a resistor do? (a) limits the current (b) makes things spin (c) is a resistance knob (d) blows if current is high
  8. 8.What does a fuse do? (a) boosts a small signal (b) stores a little charge (c) smooths a wobbly supply (d) blows if current is high
  9. 9.🧩 Which component is a resistance knob? (a) capacitor (b) motor (c) resistor (d) potentiometer
  10. 10.🧩 Which part changes electrical energy into movement? (a) a motor (b) an LED (c) a fuse (d) a resistor
  11. 11.🧩 Which component glows using little power? (a) capacitor (b) potentiometer (c) LED (d) diode
  12. 12.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
  13. 13.True or false: an LDR turns a fan or wheels. (a) True (b) False
  14. 14.🧩 Which component makes a beeping sound? (a) motor (b) buzzer (c) LED (d) transistor
  15. 15.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a capacitor (c) a buzzer (d) a diode
  16. 16.True or false: a diode turns a fan or wheels. (a) False (b) True
  17. 17.What does a buzzer do? (a) smooths a wobbly supply (b) makes a beeping sound (c) limits the current (d) makes things spin
  18. 18.🧩 Which component beeps for an alarm? (a) thermistor (b) transistor (c) buzzer (d) resistor
  19. 19.What does a transistor do? (a) makes things spin (b) has coloured bands (c) glows using little power (d) boosts a small signal
  20. 20.What does an LDR do? (a) is a resistance knob (b) senses how bright it is (c) lets current go one way (d) senses how hot it is
  21. 21.🧩 Which component senses how hot it is? (a) buzzer (b) thermistor (c) resistor (d) motor
  22. 22.True or false: a thermistor glows using little power. (a) True (b) False
  23. 23.True or false: a fuse glows using little power. (a) False (b) True
  24. 24.What does a motor do? (a) beeps for an alarm (b) is a resistance knob (c) smooths a wobbly supply (d) makes things spin
  25. 25.🧩 Which component makes things spin? (a) fuse (b) transistor (c) LDR (d) motor
  26. 26.🧩 Which component has coloured bands? (a) transistor (b) capacitor (c) resistor (d) LED
  27. 27.True or false: a potentiometer is a resistance knob. (a) True (b) False
  28. 28.What does a capacitor do? (a) smooths a wobbly supply (b) makes a beeping sound (c) boosts a small signal (d) makes things spin
  29. 29.True or false: an LED is a resistance knob. (a) True (b) False
  30. 30.True or false: a buzzer beeps for an alarm. (a) False (b) True
  31. 31.🧩 Which component smooths a wobbly supply? (a) capacitor (b) motor (c) transistor (d) LED
  32. 32.🧩 Which component blows if current is high? (a) buzzer (b) thermistor (c) diode (d) fuse
  33. 33.🧩 Which component limits the current? (a) potentiometer (b) resistor (c) diode (d) transistor
  34. 34.True or false: a resistor limits the current. (a) False (b) True
  35. 35.True or false: a capacitor stores a little charge. (a) False (b) True
  36. 36.True or false: a transistor boosts a small signal. (a) True (b) False
  37. 37.🧩 Which component turns a fan or wheels? (a) potentiometer (b) fuse (c) motor (d) buzzer
  38. 38.True or false: a capacitor glows using little power. (a) True (b) False
  39. 39.True or false: a motor makes a beeping sound. (a) False (b) True
  40. 40.What does a diode do? (a) glows using little power (b) makes a beeping sound (c) lets current go one way (d) limits the current

Answer key

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

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