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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 323 · 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 makes a beeping sound? (a) buzzer (b) diode (c) motor (d) thermistor
  2. 2.🧩 Which part changes electrical energy into movement? (a) a resistor (b) a motor (c) a fuse (d) an LED
  3. 3.True or false: a thermistor senses how hot it is. (a) False (b) True
  4. 4.🧩 A capacitor in a circuit can … (a) store charge briefly (b) make light (c) spin a wheel (d) measure heat
  5. 5.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a buzzer (c) a resistor (d) a diode
  6. 6.🧩 Which component blows if current is high? (a) transistor (b) potentiometer (c) thermistor (d) fuse
  7. 7.🧩 Which component beeps for an alarm? (a) diode (b) fuse (c) resistor (d) buzzer
  8. 8.🧩 Which component limits the current? (a) potentiometer (b) LED (c) buzzer (d) resistor
  9. 9.🧩 Which component is a resistance knob? (a) potentiometer (b) buzzer (c) motor (d) fuse
  10. 10.What does a capacitor do? (a) smooths a wobbly supply (b) is a resistance knob (c) beeps for an alarm (d) has coloured bands
  11. 11.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
  12. 12.True or false: a thermistor boosts a small signal. (a) False (b) True
  13. 13.🧩 Which component boosts a small signal? (a) motor (b) potentiometer (c) transistor (d) LDR
  14. 14.True or false: a motor makes things spin. (a) False (b) True
  15. 15.What does a thermistor do? (a) makes a beeping sound (b) makes things spin (c) stores a little charge (d) senses how hot it is
  16. 16.True or false: a diode lets current go one way. (a) False (b) True
  17. 17.True or false: a transistor lets current go one way. (a) False (b) True
  18. 18.🧩 Which component has coloured bands? (a) transistor (b) LDR (c) resistor (d) thermistor
  19. 19.🧩 Which component smooths a wobbly supply? (a) buzzer (b) LED (c) LDR (d) capacitor
  20. 20.True or false: a buzzer beeps for an alarm. (a) True (b) False
  21. 21.True or false: a buzzer smooths a wobbly supply. (a) False (b) True
  22. 22.What does a diode do? (a) beeps for an alarm (b) glows using little power (c) turns a fan or wheels (d) lets current go one way
  23. 23.🧩 Which component glows using little power? (a) LED (b) LDR (c) diode (d) buzzer
  24. 24.🧩 Which component makes things spin? (a) buzzer (b) thermistor (c) resistor (d) motor
  25. 25.What does a resistor do? (a) stores a little charge (b) limits the current (c) is a resistance knob (d) makes things spin
  26. 26.True or false: a potentiometer boosts a small signal. (a) False (b) True
  27. 27.True or false: an LED lets current go one way. (a) False (b) True
  28. 28.What does a buzzer do? (a) beeps for an alarm (b) smooths a wobbly supply (c) senses how hot it is (d) boosts a small signal
  29. 29.What does a transistor do? (a) boosts a small signal (b) turns a fan or wheels (c) is a resistance knob (d) senses how bright it is
  30. 30.True or false: a diode makes a beeping sound. (a) False (b) True
  31. 31.True or false: a resistor makes a beeping sound. (a) True (b) False
  32. 32.True or false: a potentiometer stores a little charge. (a) False (b) True
  33. 33.🧩 Which component senses how hot it is? (a) thermistor (b) fuse (c) resistor (d) LED
  34. 34.True or false: an LED glows using little power. (a) True (b) False
  35. 35.True or false: an LDR senses how bright it is. (a) True (b) False
  36. 36.True or false: a transistor blows if current is high. (a) True (b) False
  37. 37.🧩 Which component senses how bright it is? (a) buzzer (b) motor (c) fuse (d) LDR
  38. 38.True or false: a transistor boosts a small signal. (a) False (b) True
  39. 39.What does a capacitor do? (a) stores a little charge (b) lets current go one way (c) is a resistance knob (d) has coloured bands
  40. 40.True or false: a fuse blows if current is high. (a) False (b) True

Answer key

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

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