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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 198 · 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 smooths a wobbly supply? (a) LED (b) capacitor (c) transistor (d) buzzer
  2. 2.True or false: a resistor has coloured bands. (a) True (b) False
  3. 3.True or false: an LED limits the current. (a) True (b) False
  4. 4.What does a fuse do? (a) limits the current (b) blows if current is high (c) makes a beeping sound (d) makes things spin
  5. 5.What does a buzzer do? (a) senses how hot it is (b) has coloured bands (c) glows using little power (d) beeps for an alarm
  6. 6.🧩 Which component blows if current is high? (a) diode (b) potentiometer (c) motor (d) fuse
  7. 7.🧩 Which component stores a little charge? (a) capacitor (b) resistor (c) diode (d) LDR
  8. 8.🧩 Which component lets current go one way? (a) diode (b) motor (c) transistor (d) buzzer
  9. 9.True or false: a diode lets current go one way. (a) False (b) True
  10. 10.🧩 Which component turns a fan or wheels? (a) resistor (b) motor (c) transistor (d) thermistor
  11. 11.🧩 Which component beeps for an alarm? (a) motor (b) buzzer (c) transistor (d) LED
  12. 12.🧩 Which part changes electrical energy into movement? (a) an LED (b) a fuse (c) a motor (d) a resistor
  13. 13.🧩 Which component senses how bright it is? (a) LDR (b) LED (c) diode (d) motor
  14. 14.True or false: a thermistor senses how hot it is. (a) False (b) True
  15. 15.🧩 Which component makes things spin? (a) buzzer (b) LED (c) potentiometer (d) motor
  16. 16.True or false: a diode boosts a small signal. (a) True (b) False
  17. 17.What does a resistor do? (a) has coloured bands (b) makes a beeping sound (c) stores a little charge (d) makes things spin
  18. 18.🧩 Which component boosts a small signal? (a) transistor (b) potentiometer (c) capacitor (d) resistor
  19. 19.What does a diode do? (a) beeps for an alarm (b) lets current go one way (c) glows using little power (d) is a resistance knob
  20. 20.What does an LDR do? (a) lets current go one way (b) boosts a small signal (c) blows if current is high (d) senses how bright it is
  21. 21.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a capacitor (c) a diode (d) a buzzer
  22. 22.True or false: a capacitor has coloured bands. (a) True (b) False
  23. 23.True or false: an LDR senses how bright it is. (a) True (b) False
  24. 24.🧩 Which component glows using little power? (a) thermistor (b) resistor (c) motor (d) LED
  25. 25.True or false: a diode has coloured bands. (a) False (b) True
  26. 26.True or false: a diode limits the current. (a) True (b) False
  27. 27.True or false: a capacitor lets current go one way. (a) True (b) False
  28. 28.🧩 Which component limits the current? (a) transistor (b) resistor (c) LDR (d) buzzer
  29. 29.🧩 Which component has coloured bands? (a) resistor (b) potentiometer (c) LED (d) diode
  30. 30.🧩 Which component senses how hot it is? (a) fuse (b) diode (c) resistor (d) thermistor
  31. 31.What does a thermistor do? (a) blows if current is high (b) senses how hot it is (c) makes a beeping sound (d) stores a little charge
  32. 32.True or false: a buzzer makes a beeping sound. (a) True (b) False
  33. 33.What does a capacitor do? (a) limits the current (b) stores a little charge (c) makes a beeping sound (d) is a resistance knob
  34. 34.What does a buzzer do? (a) makes a beeping sound (b) blows if current is high (c) limits the current (d) smooths a wobbly supply
  35. 35.🧩 A capacitor in a circuit can … (a) measure heat (b) spin a wheel (c) store charge briefly (d) make light
  36. 36.True or false: a motor makes things spin. (a) True (b) False
  37. 37.True or false: a buzzer beeps for an alarm. (a) False (b) True
  38. 38.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
  39. 39.True or false: an LED boosts a small signal. (a) True (b) False
  40. 40.True or false: a motor turns a fan or wheels. (a) False (b) True

Answer key

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

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