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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 301 · 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 limits the current? (a) LDR (b) buzzer (c) fuse (d) resistor
  2. 2.🧩 Which part changes electrical energy into movement? (a) an LED (b) a resistor (c) a fuse (d) a motor
  3. 3.What does a transistor do? (a) boosts a small signal (b) glows using little power (c) smooths a wobbly supply (d) limits the current
  4. 4.True or false: a potentiometer is a resistance knob. (a) False (b) True
  5. 5.🧩 A capacitor in a circuit can … (a) store charge briefly (b) make light (c) measure heat (d) spin a wheel
  6. 6.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a diode (c) a buzzer (d) a resistor
  7. 7.What does a fuse do? (a) smooths a wobbly supply (b) blows if current is high (c) turns a fan or wheels (d) makes things spin
  8. 8.🧩 Which component has coloured bands? (a) thermistor (b) resistor (c) transistor (d) motor
  9. 9.True or false: a resistor is a resistance knob. (a) False (b) True
  10. 10.What does a diode do? (a) lets current go one way (b) stores a little charge (c) has coloured bands (d) blows if current is high
  11. 11.True or false: a potentiometer blows if current is high. (a) True (b) False
  12. 12.🧩 Which component lets current go one way? (a) transistor (b) resistor (c) LED (d) diode
  13. 13.What does a motor do? (a) makes things spin (b) glows using little power (c) makes a beeping sound (d) stores a little charge
  14. 14.🧩 Which component beeps for an alarm? (a) buzzer (b) transistor (c) potentiometer (d) thermistor
  15. 15.True or false: a fuse turns a fan or wheels. (a) True (b) False
  16. 16.What does an LDR do? (a) lets current go one way (b) senses how bright it is (c) smooths a wobbly supply (d) turns a fan or wheels
  17. 17.What does a thermistor do? (a) makes a beeping sound (b) is a resistance knob (c) beeps for an alarm (d) senses how hot it is
  18. 18.True or false: a potentiometer senses how hot it is. (a) True (b) False
  19. 19.True or false: a motor makes things spin. (a) True (b) False
  20. 20.🧩 Which component boosts a small signal? (a) motor (b) LED (c) transistor (d) capacitor
  21. 21.True or false: an LED beeps for an alarm. (a) False (b) True
  22. 22.True or false: a diode makes a beeping sound. (a) False (b) True
  23. 23.🧩 Which component stores a little charge? (a) capacitor (b) resistor (c) potentiometer (d) fuse
  24. 24.True or false: a capacitor limits the current. (a) True (b) False
  25. 25.True or false: a diode lets current go one way. (a) True (b) False
  26. 26.True or false: an LED makes things spin. (a) False (b) True
  27. 27.What does a resistor do? (a) senses how bright it is (b) beeps for an alarm (c) makes a beeping sound (d) has coloured bands
  28. 28.True or false: an LED boosts a small signal. (a) True (b) False
  29. 29.True or false: a transistor boosts a small signal. (a) True (b) False
  30. 30.What does a capacitor do? (a) senses how bright it is (b) stores a little charge (c) boosts a small signal (d) is a resistance knob
  31. 31.What does a buzzer do? (a) turns a fan or wheels (b) beeps for an alarm (c) senses how hot it is (d) boosts a small signal
  32. 32.🧩 Which component smooths a wobbly supply? (a) transistor (b) capacitor (c) LDR (d) buzzer
  33. 33.🧩 Which component senses how bright it is? (a) resistor (b) fuse (c) LDR (d) thermistor
  34. 34.True or false: a capacitor has coloured bands. (a) False (b) True
  35. 35.🧩 Which component turns a fan or wheels? (a) buzzer (b) potentiometer (c) motor (d) LED
  36. 36.True or false: a thermistor limits the current. (a) False (b) True
  37. 37.🧩 Which component makes a beeping sound? (a) diode (b) buzzer (c) thermistor (d) LED
  38. 38.True or false: a buzzer makes things spin. (a) False (b) True
  39. 39.True or false: a thermistor makes a beeping sound. (a) False (b) True
  40. 40.True or false: a resistor smooths a wobbly supply. (a) False (b) True

Answer key

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

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