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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 436 · 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.True or false: a capacitor stores a little charge. (a) True (b) False
  2. 2.🧩 A capacitor in a circuit can … (a) measure heat (b) store charge briefly (c) make light (d) spin a wheel
  3. 3.True or false: a motor limits the current. (a) True (b) False
  4. 4.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a buzzer (c) a capacitor (d) a diode
  5. 5.What does a potentiometer do? (a) beeps for an alarm (b) limits the current (c) is a resistance knob (d) boosts a small signal
  6. 6.What does a transistor do? (a) glows using little power (b) boosts a small signal (c) makes a beeping sound (d) blows if current is high
  7. 7.What does a resistor do? (a) glows using little power (b) lets current go one way (c) blows if current is high (d) limits the current
  8. 8.🧩 Which component limits the current? (a) resistor (b) fuse (c) motor (d) capacitor
  9. 9.True or false: a buzzer makes a beeping sound. (a) True (b) False
  10. 10.What does an LDR do? (a) lets current go one way (b) limits the current (c) makes things spin (d) senses how bright it is
  11. 11.🧩 Which part changes electrical energy into movement? (a) a fuse (b) an LED (c) a resistor (d) a motor
  12. 12.🧩 Which component glows using little power? (a) diode (b) LED (c) capacitor (d) motor
  13. 13.True or false: an LDR senses how bright it is. (a) False (b) True
  14. 14.🧩 Which component smooths a wobbly supply? (a) buzzer (b) capacitor (c) diode (d) LDR
  15. 15.🧩 Which component has coloured bands? (a) resistor (b) potentiometer (c) diode (d) thermistor
  16. 16.True or false: a motor makes a beeping sound. (a) True (b) False
  17. 17.🧩 Which component senses how bright it is? (a) LED (b) thermistor (c) motor (d) LDR
  18. 18.🧩 Which component makes things spin? (a) thermistor (b) diode (c) resistor (d) motor
  19. 19.What does a capacitor do? (a) blows if current is high (b) beeps for an alarm (c) stores a little charge (d) is a resistance knob
  20. 20.True or false: a motor makes things spin. (a) False (b) True
  21. 21.True or false: a buzzer limits the current. (a) True (b) False
  22. 22.What does a buzzer do? (a) senses how hot it is (b) is a resistance knob (c) beeps for an alarm (d) smooths a wobbly supply
  23. 23.True or false: a motor smooths a wobbly supply. (a) False (b) True
  24. 24.True or false: a potentiometer is a resistance knob. (a) False (b) True
  25. 25.🧩 Which component is a resistance knob? (a) buzzer (b) diode (c) transistor (d) potentiometer
  26. 26.True or false: a potentiometer glows using little power. (a) False (b) True
  27. 27.True or false: a diode lets current go one way. (a) True (b) False
  28. 28.True or false: a diode turns a fan or wheels. (a) False (b) True
  29. 29.🧩 Which component beeps for an alarm? (a) capacitor (b) buzzer (c) diode (d) potentiometer
  30. 30.🧩 Which component boosts a small signal? (a) transistor (b) thermistor (c) potentiometer (d) LDR
  31. 31.🧩 Which component stores a little charge? (a) diode (b) resistor (c) motor (d) capacitor
  32. 32.What does a fuse do? (a) blows if current is high (b) stores a little charge (c) has coloured bands (d) smooths a wobbly supply
  33. 33.🧩 Which component lets current go one way? (a) diode (b) potentiometer (c) LED (d) capacitor
  34. 34.True or false: a capacitor boosts a small signal. (a) True (b) False
  35. 35.True or false: a fuse makes a beeping sound. (a) False (b) True
  36. 36.True or false: an LED limits the current. (a) True (b) False
  37. 37.🧩 Which component blows if current is high? (a) potentiometer (b) LDR (c) motor (d) fuse
  38. 38.True or false: a resistor has coloured bands. (a) True (b) False
  39. 39.True or false: a transistor boosts a small signal. (a) True (b) False
  40. 40.True or false: a thermistor senses how bright it is. (a) True (b) False

Answer key

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

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