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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 120 · 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 boosts a small signal? (a) transistor (b) diode (c) LED (d) buzzer
  2. 2.What does an LDR do? (a) has coloured bands (b) boosts a small signal (c) glows using little power (d) senses how bright it is
  3. 3.True or false: a resistor makes a beeping sound. (a) True (b) False
  4. 4.True or false: a motor turns a fan or wheels. (a) False (b) True
  5. 5.True or false: an LDR senses how bright it is. (a) False (b) True
  6. 6.🧩 Which part changes electrical energy into sound? (a) a diode (b) a buzzer (c) a capacitor (d) a resistor
  7. 7.What does a buzzer do? (a) glows using little power (b) senses how hot it is (c) beeps for an alarm (d) limits the current
  8. 8.What does a thermistor do? (a) limits the current (b) makes a beeping sound (c) senses how hot it is (d) makes things spin
  9. 9.🧩 A capacitor in a circuit can … (a) spin a wheel (b) store charge briefly (c) make light (d) measure heat
  10. 10.What does a buzzer do? (a) boosts a small signal (b) smooths a wobbly supply (c) glows using little power (d) makes a beeping sound
  11. 11.True or false: a fuse smooths a wobbly supply. (a) False (b) True
  12. 12.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
  13. 13.True or false: a capacitor stores a little charge. (a) True (b) False
  14. 14.True or false: a thermistor boosts a small signal. (a) True (b) False
  15. 15.True or false: a thermistor stores a little charge. (a) False (b) True
  16. 16.True or false: a buzzer smooths a wobbly supply. (a) True (b) False
  17. 17.🧩 Which component glows using little power? (a) LED (b) transistor (c) potentiometer (d) thermistor
  18. 18.🧩 Which component has coloured bands? (a) capacitor (b) LDR (c) resistor (d) thermistor
  19. 19.What does a capacitor do? (a) blows if current is high (b) senses how bright it is (c) smooths a wobbly supply (d) makes things spin
  20. 20.🧩 Which component makes a beeping sound? (a) diode (b) capacitor (c) buzzer (d) fuse
  21. 21.True or false: a fuse blows if current is high. (a) False (b) True
  22. 22.What does a capacitor do? (a) stores a little charge (b) senses how bright it is (c) is a resistance knob (d) turns a fan or wheels
  23. 23.What does a diode do? (a) stores a little charge (b) makes things spin (c) smooths a wobbly supply (d) lets current go one way
  24. 24.True or false: a diode boosts a small signal. (a) False (b) True
  25. 25.What does an LED do? (a) glows using little power (b) senses how bright it is (c) blows if current is high (d) makes a beeping sound
  26. 26.True or false: a thermistor senses how hot it is. (a) False (b) True
  27. 27.🧩 Which component stores a little charge? (a) capacitor (b) resistor (c) transistor (d) potentiometer
  28. 28.True or false: a buzzer lets current go one way. (a) False (b) True
  29. 29.🧩 Which component smooths a wobbly supply? (a) motor (b) capacitor (c) buzzer (d) fuse
  30. 30.True or false: a motor makes things spin. (a) True (b) False
  31. 31.🧩 Which part changes electrical energy into movement? (a) a fuse (b) an LED (c) a motor (d) a resistor
  32. 32.🧩 Which component beeps for an alarm? (a) diode (b) resistor (c) buzzer (d) thermistor
  33. 33.True or false: a resistor glows using little power. (a) False (b) True
  34. 34.True or false: a resistor is a resistance knob. (a) True (b) False
  35. 35.True or false: an LED smooths a wobbly supply. (a) True (b) False
  36. 36.🧩 Which component senses how hot it is? (a) resistor (b) motor (c) thermistor (d) LED
  37. 37.🧩 Which component turns a fan or wheels? (a) LDR (b) motor (c) fuse (d) capacitor
  38. 38.True or false: a capacitor blows if current is high. (a) True (b) False
  39. 39.🧩 Which component blows if current is high? (a) fuse (b) potentiometer (c) resistor (d) buzzer
  40. 40.What does a transistor do? (a) has coloured bands (b) makes a beeping sound (c) boosts a small signal (d) senses how hot it is

Answer key

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

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