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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 656 · 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 beeps for an alarm? (a) diode (b) buzzer (c) fuse (d) LED
  2. 2.🧩 A capacitor in a circuit can … (a) spin a wheel (b) measure heat (c) store charge briefly (d) make light
  3. 3.What does a buzzer do? (a) has coloured bands (b) limits the current (c) makes a beeping sound (d) makes things spin
  4. 4.True or false: a buzzer beeps for an alarm. (a) False (b) True
  5. 5.What does a thermistor do? (a) blows if current is high (b) senses how hot it is (c) smooths a wobbly supply (d) limits the current
  6. 6.True or false: a diode senses how hot it is. (a) False (b) True
  7. 7.🧩 Which part changes electrical energy into sound? (a) a diode (b) a resistor (c) a capacitor (d) a buzzer
  8. 8.True or false: an LED senses how hot it is. (a) True (b) False
  9. 9.🧩 Which part changes electrical energy into movement? (a) a fuse (b) an LED (c) a resistor (d) a motor
  10. 10.True or false: a potentiometer blows if current is high. (a) False (b) True
  11. 11.True or false: a resistor limits the current. (a) False (b) True
  12. 12.What does a capacitor do? (a) smooths a wobbly supply (b) beeps for an alarm (c) has coloured bands (d) turns a fan or wheels
  13. 13.🧩 Which component boosts a small signal? (a) motor (b) transistor (c) thermistor (d) LDR
  14. 14.True or false: an LED glows using little power. (a) False (b) True
  15. 15.What does a motor do? (a) is a resistance knob (b) turns a fan or wheels (c) lets current go one way (d) glows using little power
  16. 16.🧩 Which component smooths a wobbly supply? (a) LED (b) buzzer (c) resistor (d) capacitor
  17. 17.🧩 Which component turns a fan or wheels? (a) motor (b) LDR (c) potentiometer (d) diode
  18. 18.What does a resistor do? (a) lets current go one way (b) makes a beeping sound (c) limits the current (d) makes things spin
  19. 19.🧩 Which component glows using little power? (a) thermistor (b) LED (c) LDR (d) transistor
  20. 20.🧩 Which component blows if current is high? (a) buzzer (b) fuse (c) LDR (d) resistor
  21. 21.What does a motor do? (a) makes things spin (b) boosts a small signal (c) has coloured bands (d) smooths a wobbly supply
  22. 22.True or false: a potentiometer limits the current. (a) True (b) False
  23. 23.True or false: a capacitor boosts a small signal. (a) True (b) False
  24. 24.🧩 Which component lets current go one way? (a) LDR (b) capacitor (c) diode (d) LED
  25. 25.What does a buzzer do? (a) beeps for an alarm (b) glows using little power (c) turns a fan or wheels (d) lets current go one way
  26. 26.True or false: a potentiometer turns a fan or wheels. (a) False (b) True
  27. 27.True or false: an LDR stores a little charge. (a) False (b) True
  28. 28.What does an LDR do? (a) has coloured bands (b) boosts a small signal (c) senses how bright it is (d) beeps for an alarm
  29. 29.True or false: a motor makes things spin. (a) False (b) True
  30. 30.True or false: an LDR senses how bright it is. (a) False (b) True
  31. 31.True or false: a fuse turns a fan or wheels. (a) True (b) False
  32. 32.True or false: a thermistor senses how hot it is. (a) False (b) True
  33. 33.What does a resistor do? (a) has coloured bands (b) stores a little charge (c) smooths a wobbly supply (d) beeps for an alarm
  34. 34.🧩 Which component has coloured bands? (a) resistor (b) capacitor (c) transistor (d) LDR
  35. 35.True or false: a transistor boosts a small signal. (a) False (b) True
  36. 36.True or false: a capacitor glows using little power. (a) True (b) False
  37. 37.What does a fuse do? (a) makes a beeping sound (b) glows using little power (c) senses how hot it is (d) blows if current is high
  38. 38.What does a capacitor do? (a) stores a little charge (b) beeps for an alarm (c) boosts a small signal (d) makes things spin
  39. 39.True or false: a diode has coloured bands. (a) False (b) True
  40. 40.True or false: a potentiometer is a resistance knob. (a) False (b) True

Answer key

  1. buzzer
  2. store charge briefly
  3. makes a beeping sound
  4. True
  5. senses how hot it is
  6. False
  7. a buzzer
  8. False
  9. a motor
  10. False
  11. True
  12. smooths a wobbly supply
  13. transistor
  14. True
  15. turns a fan or wheels
  16. capacitor
  17. motor
  18. limits the current
  19. LED
  20. fuse
  21. makes things spin
  22. False
  23. False
  24. diode
  25. beeps for an alarm
  26. False
  27. False
  28. senses how bright it is
  29. True
  30. True
  31. False
  32. True
  33. has coloured bands
  34. resistor
  35. True
  36. False
  37. blows if current is high
  38. stores a little charge
  39. False
  40. True

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