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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 612 · 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.🧩 A capacitor in a circuit can … (a) spin a wheel (b) store charge briefly (c) measure heat (d) make light
  2. 2.True or false: a buzzer beeps for an alarm. (a) True (b) False
  3. 3.True or false: an LED stores a little charge. (a) False (b) True
  4. 4.True or false: a motor turns a fan or wheels. (a) True (b) False
  5. 5.🧩 Which part changes electrical energy into sound? (a) a buzzer (b) a capacitor (c) a resistor (d) a diode
  6. 6.What does a resistor do? (a) smooths a wobbly supply (b) beeps for an alarm (c) limits the current (d) blows if current is high
  7. 7.🧩 Which component lets current go one way? (a) motor (b) capacitor (c) diode (d) resistor
  8. 8.True or false: a potentiometer glows using little power. (a) True (b) False
  9. 9.What does a buzzer do? (a) blows if current is high (b) smooths a wobbly supply (c) makes a beeping sound (d) lets current go one way
  10. 10.True or false: an LED smooths a wobbly supply. (a) False (b) True
  11. 11.🧩 Which part changes electrical energy into movement? (a) a fuse (b) a resistor (c) an LED (d) a motor
  12. 12.True or false: a potentiometer beeps for an alarm. (a) True (b) False
  13. 13.What does a buzzer do? (a) lets current go one way (b) boosts a small signal (c) beeps for an alarm (d) limits the current
  14. 14.What does a transistor do? (a) beeps for an alarm (b) limits the current (c) boosts a small signal (d) turns a fan or wheels
  15. 15.🧩 Which component makes things spin? (a) motor (b) LED (c) diode (d) capacitor
  16. 16.🧩 Which component senses how bright it is? (a) LDR (b) fuse (c) resistor (d) capacitor
  17. 17.🧩 Which component turns a fan or wheels? (a) capacitor (b) motor (c) fuse (d) LED
  18. 18.True or false: a capacitor boosts a small signal. (a) True (b) False
  19. 19.🧩 Which component is a resistance knob? (a) buzzer (b) potentiometer (c) LED (d) motor
  20. 20.🧩 Which component blows if current is high? (a) fuse (b) transistor (c) diode (d) LDR
  21. 21.🧩 Which component beeps for an alarm? (a) LDR (b) buzzer (c) capacitor (d) resistor
  22. 22.True or false: a buzzer boosts a small signal. (a) True (b) False
  23. 23.🧩 Which component smooths a wobbly supply? (a) thermistor (b) capacitor (c) diode (d) potentiometer
  24. 24.True or false: a resistor has coloured bands. (a) True (b) False
  25. 25.True or false: a motor has coloured bands. (a) True (b) False
  26. 26.True or false: a fuse blows if current is high. (a) True (b) False
  27. 27.🧩 Which component makes a beeping sound? (a) resistor (b) buzzer (c) LED (d) transistor
  28. 28.True or false: a motor boosts a small signal. (a) False (b) True
  29. 29.What does a motor do? (a) glows using little power (b) turns a fan or wheels (c) senses how bright it is (d) limits the current
  30. 30.True or false: a potentiometer turns a fan or wheels. (a) True (b) False
  31. 31.True or false: a thermistor boosts a small signal. (a) True (b) False
  32. 32.🧩 Which component glows using little power? (a) diode (b) LED (c) buzzer (d) capacitor
  33. 33.What does a diode do? (a) boosts a small signal (b) makes things spin (c) lets current go one way (d) blows if current is high
  34. 34.🧩 Which component senses how hot it is? (a) potentiometer (b) transistor (c) fuse (d) thermistor
  35. 35.True or false: a transistor has coloured bands. (a) False (b) True
  36. 36.True or false: a buzzer makes a beeping sound. (a) False (b) True
  37. 37.🧩 Which component boosts a small signal? (a) fuse (b) buzzer (c) thermistor (d) transistor
  38. 38.True or false: a transistor makes things spin. (a) True (b) False
  39. 39.What does a thermistor do? (a) lets current go one way (b) senses how hot it is (c) limits the current (d) makes a beeping sound
  40. 40.What does a potentiometer do? (a) blows if current is high (b) is a resistance knob (c) limits the current (d) makes a beeping sound

Answer key

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

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