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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 165 · 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 diode (b) a capacitor (c) a buzzer (d) a resistor
  2. 2.True or false: a fuse is a resistance knob. (a) True (b) False
  3. 3.What does an LED do? (a) blows if current is high (b) glows using little power (c) makes things spin (d) is a resistance knob
  4. 4.What does a motor do? (a) blows if current is high (b) stores a little charge (c) smooths a wobbly supply (d) makes things spin
  5. 5.True or false: a diode turns a fan or wheels. (a) False (b) True
  6. 6.🧩 Which component boosts a small signal? (a) transistor (b) capacitor (c) motor (d) resistor
  7. 7.🧩 A capacitor in a circuit can … (a) make light (b) spin a wheel (c) measure heat (d) store charge briefly
  8. 8.True or false: a buzzer smooths a wobbly supply. (a) True (b) False
  9. 9.What does a motor do? (a) turns a fan or wheels (b) blows if current is high (c) makes a beeping sound (d) senses how bright it is
  10. 10.True or false: a fuse senses how hot it is. (a) False (b) True
  11. 11.🧩 Which component beeps for an alarm? (a) diode (b) buzzer (c) potentiometer (d) motor
  12. 12.What does a diode do? (a) senses how bright it is (b) stores a little charge (c) has coloured bands (d) lets current go one way
  13. 13.True or false: a capacitor smooths a wobbly supply. (a) True (b) False
  14. 14.What does a transistor do? (a) boosts a small signal (b) has coloured bands (c) beeps for an alarm (d) senses how hot it is
  15. 15.True or false: a resistor limits the current. (a) False (b) True
  16. 16.🧩 Which component makes a beeping sound? (a) capacitor (b) thermistor (c) fuse (d) buzzer
  17. 17.🧩 Which component smooths a wobbly supply? (a) motor (b) LDR (c) potentiometer (d) capacitor
  18. 18.What does a thermistor do? (a) stores a little charge (b) lets current go one way (c) has coloured bands (d) senses how hot it is
  19. 19.🧩 Which part changes electrical energy into movement? (a) a fuse (b) a motor (c) an LED (d) a resistor
  20. 20.🧩 Which component senses how hot it is? (a) diode (b) thermistor (c) potentiometer (d) transistor
  21. 21.True or false: a transistor limits the current. (a) True (b) False
  22. 22.True or false: a resistor is a resistance knob. (a) True (b) False
  23. 23.🧩 Which component blows if current is high? (a) capacitor (b) fuse (c) LED (d) LDR
  24. 24.🧩 Which component stores a little charge? (a) LED (b) diode (c) potentiometer (d) capacitor
  25. 25.What does an LDR do? (a) smooths a wobbly supply (b) limits the current (c) makes a beeping sound (d) senses how bright it is
  26. 26.True or false: a fuse blows if current is high. (a) True (b) False
  27. 27.🧩 Which component glows using little power? (a) LDR (b) fuse (c) buzzer (d) LED
  28. 28.True or false: a fuse has coloured bands. (a) False (b) True
  29. 29.🧩 Which component lets current go one way? (a) diode (b) LED (c) buzzer (d) fuse
  30. 30.True or false: a buzzer beeps for an alarm. (a) True (b) False
  31. 31.What does a potentiometer do? (a) limits the current (b) has coloured bands (c) boosts a small signal (d) is a resistance knob
  32. 32.True or false: a motor makes things spin. (a) True (b) False
  33. 33.True or false: an LED beeps for an alarm. (a) True (b) False
  34. 34.True or false: an LED smooths a wobbly supply. (a) True (b) False
  35. 35.True or false: a buzzer limits the current. (a) True (b) False
  36. 36.🧩 Which component turns a fan or wheels? (a) fuse (b) motor (c) LDR (d) buzzer
  37. 37.🧩 Which component limits the current? (a) resistor (b) diode (c) fuse (d) motor
  38. 38.True or false: a potentiometer beeps for an alarm. (a) False (b) True
  39. 39.🧩 Which component senses how bright it is? (a) LDR (b) thermistor (c) potentiometer (d) LED
  40. 40.What does a fuse do? (a) makes things spin (b) glows using little power (c) turns a fan or wheels (d) blows if current is high

Answer key

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

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