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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 250 · 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 capacitor (b) a buzzer (c) a resistor (d) a diode
  2. 2.🧩 Which component senses how bright it is? (a) diode (b) capacitor (c) LDR (d) fuse
  3. 3.🧩 Which part changes electrical energy into movement? (a) a fuse (b) a motor (c) an LED (d) a resistor
  4. 4.🧩 Which component glows using little power? (a) LED (b) thermistor (c) buzzer (d) resistor
  5. 5.True or false: a motor senses how bright it is. (a) True (b) False
  6. 6.True or false: an LED lets current go one way. (a) False (b) True
  7. 7.True or false: a resistor limits the current. (a) True (b) False
  8. 8.🧩 Which component smooths a wobbly supply? (a) capacitor (b) buzzer (c) thermistor (d) resistor
  9. 9.🧩 Which component lets current go one way? (a) fuse (b) LED (c) resistor (d) diode
  10. 10.🧩 Which component has coloured bands? (a) resistor (b) capacitor (c) LED (d) diode
  11. 11.🧩 Which component stores a little charge? (a) thermistor (b) buzzer (c) capacitor (d) resistor
  12. 12.🧩 A capacitor in a circuit can … (a) store charge briefly (b) spin a wheel (c) measure heat (d) make light
  13. 13.What does a capacitor do? (a) beeps for an alarm (b) makes things spin (c) glows using little power (d) smooths a wobbly supply
  14. 14.What does an LED do? (a) stores a little charge (b) makes things spin (c) boosts a small signal (d) glows using little power
  15. 15.True or false: a diode lets current go one way. (a) False (b) True
  16. 16.What does a thermistor do? (a) has coloured bands (b) smooths a wobbly supply (c) boosts a small signal (d) senses how hot it is
  17. 17.True or false: a potentiometer is a resistance knob. (a) False (b) True
  18. 18.🧩 Which component senses how hot it is? (a) thermistor (b) potentiometer (c) capacitor (d) fuse
  19. 19.🧩 Which component boosts a small signal? (a) fuse (b) diode (c) LED (d) transistor
  20. 20.What does a motor do? (a) limits the current (b) makes things spin (c) blows if current is high (d) boosts a small signal
  21. 21.🧩 Which component turns a fan or wheels? (a) LED (b) capacitor (c) transistor (d) motor
  22. 22.What does a diode do? (a) glows using little power (b) limits the current (c) lets current go one way (d) makes things spin
  23. 23.What does a buzzer do? (a) turns a fan or wheels (b) stores a little charge (c) makes a beeping sound (d) boosts a small signal
  24. 24.What does a transistor do? (a) turns a fan or wheels (b) blows if current is high (c) boosts a small signal (d) has coloured bands
  25. 25.True or false: a motor turns a fan or wheels. (a) False (b) True
  26. 26.True or false: a buzzer makes a beeping sound. (a) True (b) False
  27. 27.🧩 Which component is a resistance knob? (a) fuse (b) thermistor (c) motor (d) potentiometer
  28. 28.True or false: a buzzer limits the current. (a) True (b) False
  29. 29.True or false: a buzzer boosts a small signal. (a) True (b) False
  30. 30.True or false: a capacitor smooths a wobbly supply. (a) True (b) False
  31. 31.True or false: a potentiometer turns a fan or wheels. (a) False (b) True
  32. 32.🧩 Which component blows if current is high? (a) transistor (b) potentiometer (c) LED (d) fuse
  33. 33.🧩 Which component makes things spin? (a) diode (b) motor (c) transistor (d) LED
  34. 34.True or false: a transistor boosts a small signal. (a) False (b) True
  35. 35.True or false: a fuse blows if current is high. (a) True (b) False
  36. 36.True or false: a transistor turns a fan or wheels. (a) True (b) False
  37. 37.True or false: a potentiometer senses how hot it is. (a) True (b) False
  38. 38.What does a motor do? (a) stores a little charge (b) lets current go one way (c) senses how hot it is (d) turns a fan or wheels
  39. 39.What does a potentiometer do? (a) has coloured bands (b) beeps for an alarm (c) is a resistance knob (d) makes a beeping sound
  40. 40.🧩 Which component makes a beeping sound? (a) thermistor (b) diode (c) resistor (d) buzzer

Answer key

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

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