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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 509 · 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 resistor (c) a diode (d) a buzzer
  2. 2.True or false: a thermistor makes things spin. (a) True (b) False
  3. 3.True or false: a resistor limits the current. (a) True (b) False
  4. 4.🧩 Which part changes electrical energy into movement? (a) a resistor (b) a motor (c) a fuse (d) an LED
  5. 5.🧩 Which component blows if current is high? (a) fuse (b) capacitor (c) potentiometer (d) LED
  6. 6.🧩 Which component lets current go one way? (a) LDR (b) diode (c) capacitor (d) resistor
  7. 7.🧩 Which component stores a little charge? (a) capacitor (b) transistor (c) LED (d) buzzer
  8. 8.🧩 A capacitor in a circuit can … (a) spin a wheel (b) measure heat (c) make light (d) store charge briefly
  9. 9.🧩 Which component limits the current? (a) resistor (b) thermistor (c) potentiometer (d) diode
  10. 10.🧩 Which component has coloured bands? (a) LED (b) potentiometer (c) resistor (d) LDR
  11. 11.What does a thermistor do? (a) turns a fan or wheels (b) blows if current is high (c) glows using little power (d) senses how hot it is
  12. 12.🧩 Which component makes things spin? (a) buzzer (b) LED (c) potentiometer (d) motor
  13. 13.True or false: a motor turns a fan or wheels. (a) True (b) False
  14. 14.What does a resistor do? (a) limits the current (b) makes a beeping sound (c) turns a fan or wheels (d) glows using little power
  15. 15.What does an LDR do? (a) beeps for an alarm (b) stores a little charge (c) limits the current (d) senses how bright it is
  16. 16.What does a buzzer do? (a) beeps for an alarm (b) boosts a small signal (c) glows using little power (d) senses how hot it is
  17. 17.True or false: an LED glows using little power. (a) False (b) True
  18. 18.True or false: a transistor boosts a small signal. (a) True (b) False
  19. 19.🧩 Which component makes a beeping sound? (a) fuse (b) thermistor (c) buzzer (d) potentiometer
  20. 20.True or false: a buzzer makes a beeping sound. (a) True (b) False
  21. 21.🧩 Which component beeps for an alarm? (a) buzzer (b) transistor (c) resistor (d) thermistor
  22. 22.🧩 Which component senses how hot it is? (a) thermistor (b) fuse (c) resistor (d) diode
  23. 23.True or false: a motor limits the current. (a) False (b) True
  24. 24.True or false: a capacitor stores a little charge. (a) False (b) True
  25. 25.What does a transistor do? (a) boosts a small signal (b) lets current go one way (c) makes things spin (d) smooths a wobbly supply
  26. 26.True or false: an LED stores a little charge. (a) False (b) True
  27. 27.What does an LED do? (a) has coloured bands (b) limits the current (c) senses how bright it is (d) glows using little power
  28. 28.What does a resistor do? (a) blows if current is high (b) has coloured bands (c) boosts a small signal (d) smooths a wobbly supply
  29. 29.True or false: a diode glows using little power. (a) False (b) True
  30. 30.What does a capacitor do? (a) glows using little power (b) smooths a wobbly supply (c) is a resistance knob (d) has coloured bands
  31. 31.What does a motor do? (a) makes things spin (b) senses how bright it is (c) blows if current is high (d) has coloured bands
  32. 32.True or false: a motor makes things spin. (a) False (b) True
  33. 33.What does a fuse do? (a) boosts a small signal (b) blows if current is high (c) makes a beeping sound (d) glows using little power
  34. 34.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
  35. 35.True or false: a resistor has coloured bands. (a) False (b) True
  36. 36.True or false: a buzzer beeps for an alarm. (a) False (b) True
  37. 37.True or false: a buzzer lets current go one way. (a) False (b) True
  38. 38.🧩 Which component smooths a wobbly supply? (a) diode (b) capacitor (c) resistor (d) transistor
  39. 39.🧩 Which component senses how bright it is? (a) LED (b) resistor (c) thermistor (d) LDR
  40. 40.🧩 Which component boosts a small signal? (a) fuse (b) potentiometer (c) LDR (d) transistor

Answer key

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

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