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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 414 · 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 part changes electrical energy into sound? (a) a buzzer (b) a diode (c) a resistor (d) a capacitor
  2. 2.🧩 Which component makes a beeping sound? (a) LED (b) potentiometer (c) diode (d) buzzer
  3. 3.What does an LED do? (a) glows using little power (b) makes a beeping sound (c) beeps for an alarm (d) is a resistance knob
  4. 4.🧩 A capacitor in a circuit can … (a) spin a wheel (b) make light (c) store charge briefly (d) measure heat
  5. 5.True or false: a transistor boosts a small signal. (a) False (b) True
  6. 6.True or false: a resistor limits the current. (a) False (b) True
  7. 7.🧩 Which component glows using little power? (a) resistor (b) transistor (c) LED (d) LDR
  8. 8.True or false: a potentiometer is a resistance knob. (a) True (b) False
  9. 9.What does a thermistor do? (a) glows using little power (b) senses how hot it is (c) blows if current is high (d) turns a fan or wheels
  10. 10.🧩 Which component lets current go one way? (a) buzzer (b) thermistor (c) LDR (d) diode
  11. 11.True or false: an LED glows using little power. (a) True (b) False
  12. 12.True or false: a motor makes things spin. (a) False (b) True
  13. 13.🧩 Which component boosts a small signal? (a) LED (b) fuse (c) transistor (d) resistor
  14. 14.🧩 Which component is a resistance knob? (a) capacitor (b) potentiometer (c) LDR (d) thermistor
  15. 15.True or false: a buzzer boosts a small signal. (a) False (b) True
  16. 16.True or false: a buzzer limits the current. (a) True (b) False
  17. 17.True or false: a buzzer senses how bright it is. (a) False (b) True
  18. 18.What does a resistor do? (a) has coloured bands (b) glows using little power (c) senses how bright it is (d) beeps for an alarm
  19. 19.🧩 Which part changes electrical energy into movement? (a) a fuse (b) an LED (c) a resistor (d) a motor
  20. 20.What does a potentiometer do? (a) turns a fan or wheels (b) senses how bright it is (c) has coloured bands (d) is a resistance knob
  21. 21.🧩 Which component beeps for an alarm? (a) motor (b) capacitor (c) LDR (d) buzzer
  22. 22.What does a buzzer do? (a) senses how bright it is (b) makes things spin (c) beeps for an alarm (d) has coloured bands
  23. 23.What does a buzzer do? (a) smooths a wobbly supply (b) glows using little power (c) makes a beeping sound (d) turns a fan or wheels
  24. 24.What does a motor do? (a) limits the current (b) makes things spin (c) senses how bright it is (d) is a resistance knob
  25. 25.What does a transistor do? (a) beeps for an alarm (b) senses how hot it is (c) boosts a small signal (d) glows using little power
  26. 26.What does a diode do? (a) has coloured bands (b) lets current go one way (c) stores a little charge (d) makes a beeping sound
  27. 27.True or false: an LED senses how bright it is. (a) False (b) True
  28. 28.🧩 Which component blows if current is high? (a) resistor (b) fuse (c) potentiometer (d) capacitor
  29. 29.True or false: an LDR turns a fan or wheels. (a) False (b) True
  30. 30.What does a fuse do? (a) smooths a wobbly supply (b) blows if current is high (c) stores a little charge (d) limits the current
  31. 31.🧩 Which component smooths a wobbly supply? (a) diode (b) LDR (c) fuse (d) capacitor
  32. 32.🧩 Which component stores a little charge? (a) fuse (b) capacitor (c) resistor (d) buzzer
  33. 33.🧩 Which component turns a fan or wheels? (a) motor (b) LED (c) thermistor (d) resistor
  34. 34.True or false: a capacitor blows if current is high. (a) True (b) False
  35. 35.True or false: an LDR senses how bright it is. (a) False (b) True
  36. 36.🧩 Which component senses how bright it is? (a) thermistor (b) potentiometer (c) capacitor (d) LDR
  37. 37.What does a resistor do? (a) makes things spin (b) limits the current (c) blows if current is high (d) is a resistance knob
  38. 38.True or false: a motor smooths a wobbly supply. (a) True (b) False
  39. 39.True or false: an LDR boosts a small signal. (a) True (b) False
  40. 40.🧩 Which component senses how hot it is? (a) potentiometer (b) thermistor (c) diode (d) resistor

Answer key

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

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