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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 89 · 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.What does a potentiometer do? (a) turns a fan or wheels (b) is a resistance knob (c) has coloured bands (d) senses how bright it is
  2. 2.🧩 Which component smooths a wobbly supply? (a) capacitor (b) buzzer (c) transistor (d) diode
  3. 3.What does a resistor do? (a) makes a beeping sound (b) smooths a wobbly supply (c) senses how hot it is (d) limits the current
  4. 4.What does an LED do? (a) has coloured bands (b) makes a beeping sound (c) blows if current is high (d) glows using little power
  5. 5.🧩 A capacitor in a circuit can … (a) measure heat (b) spin a wheel (c) make light (d) store charge briefly
  6. 6.What does a fuse do? (a) smooths a wobbly supply (b) blows if current is high (c) stores a little charge (d) glows using little power
  7. 7.What does a buzzer do? (a) stores a little charge (b) makes a beeping sound (c) turns a fan or wheels (d) has coloured bands
  8. 8.True or false: a potentiometer glows using little power. (a) True (b) False
  9. 9.🧩 Which component makes things spin? (a) diode (b) motor (c) thermistor (d) LDR
  10. 10.True or false: a capacitor stores a little charge. (a) False (b) True
  11. 11.What does a motor do? (a) senses how hot it is (b) senses how bright it is (c) makes things spin (d) lets current go one way
  12. 12.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a diode (c) a resistor (d) a buzzer
  13. 13.🧩 Which component glows using little power? (a) thermistor (b) transistor (c) buzzer (d) LED
  14. 14.True or false: a diode has coloured bands. (a) True (b) False
  15. 15.🧩 Which component stores a little charge? (a) diode (b) LED (c) thermistor (d) capacitor
  16. 16.True or false: a thermistor stores a little charge. (a) False (b) True
  17. 17.🧩 Which component senses how hot it is? (a) fuse (b) potentiometer (c) diode (d) thermistor
  18. 18.True or false: a transistor smooths a wobbly supply. (a) False (b) True
  19. 19.🧩 Which component boosts a small signal? (a) transistor (b) buzzer (c) resistor (d) fuse
  20. 20.🧩 Which part changes electrical energy into movement? (a) a resistor (b) an LED (c) a fuse (d) a motor
  21. 21.True or false: an LDR senses how bright it is. (a) True (b) False
  22. 22.True or false: a buzzer boosts a small signal. (a) False (b) True
  23. 23.What does a motor do? (a) turns a fan or wheels (b) senses how bright it is (c) boosts a small signal (d) stores a little charge
  24. 24.🧩 Which component turns a fan or wheels? (a) motor (b) potentiometer (c) capacitor (d) diode
  25. 25.🧩 Which component makes a beeping sound? (a) LED (b) transistor (c) buzzer (d) resistor
  26. 26.True or false: a buzzer beeps for an alarm. (a) True (b) False
  27. 27.True or false: an LDR turns a fan or wheels. (a) False (b) True
  28. 28.What does a capacitor do? (a) stores a little charge (b) turns a fan or wheels (c) blows if current is high (d) beeps for an alarm
  29. 29.🧩 Which component limits the current? (a) LDR (b) potentiometer (c) fuse (d) resistor
  30. 30.True or false: a transistor boosts a small signal. (a) True (b) False
  31. 31.True or false: a resistor senses how bright it is. (a) True (b) False
  32. 32.True or false: a capacitor boosts a small signal. (a) True (b) False
  33. 33.🧩 Which component lets current go one way? (a) fuse (b) resistor (c) diode (d) capacitor
  34. 34.True or false: a buzzer makes things spin. (a) True (b) False
  35. 35.What does a thermistor do? (a) boosts a small signal (b) senses how hot it is (c) makes a beeping sound (d) has coloured bands
  36. 36.What does a transistor do? (a) boosts a small signal (b) blows if current is high (c) smooths a wobbly supply (d) beeps for an alarm
  37. 37.🧩 Which component beeps for an alarm? (a) transistor (b) thermistor (c) resistor (d) buzzer
  38. 38.True or false: a resistor beeps for an alarm. (a) True (b) False
  39. 39.True or false: a potentiometer senses how hot it is. (a) False (b) True
  40. 40.True or false: a buzzer has coloured bands. (a) False (b) True

Answer key

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

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