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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 184 · 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 makes a beeping sound? (a) buzzer (b) LED (c) capacitor (d) potentiometer
  2. 2.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
  3. 3.True or false: a motor turns a fan or wheels. (a) False (b) True
  4. 4.🧩 Which component makes things spin? (a) resistor (b) transistor (c) LDR (d) motor
  5. 5.🧩 Which part changes electrical energy into movement? (a) a motor (b) a resistor (c) a fuse (d) an LED
  6. 6.🧩 Which component beeps for an alarm? (a) diode (b) resistor (c) buzzer (d) LDR
  7. 7.True or false: a fuse blows if current is high. (a) False (b) True
  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 has coloured bands? (a) LED (b) buzzer (c) resistor (d) capacitor
  10. 10.What does a capacitor do? (a) limits the current (b) turns a fan or wheels (c) smooths a wobbly supply (d) senses how hot it is
  11. 11.True or false: a motor limits the current. (a) True (b) False
  12. 12.🧩 Which component glows using little power? (a) diode (b) LED (c) transistor (d) buzzer
  13. 13.What does a transistor do? (a) makes a beeping sound (b) beeps for an alarm (c) smooths a wobbly supply (d) boosts a small signal
  14. 14.What does a fuse do? (a) makes things spin (b) smooths a wobbly supply (c) blows if current is high (d) limits the current
  15. 15.🧩 Which component blows if current is high? (a) fuse (b) buzzer (c) capacitor (d) resistor
  16. 16.What does a potentiometer do? (a) boosts a small signal (b) is a resistance knob (c) blows if current is high (d) has coloured bands
  17. 17.🧩 Which component is a resistance knob? (a) diode (b) LDR (c) thermistor (d) potentiometer
  18. 18.What does a thermistor do? (a) blows if current is high (b) is a resistance knob (c) has coloured bands (d) senses how hot it is
  19. 19.🧩 Which component stores a little charge? (a) buzzer (b) capacitor (c) thermistor (d) fuse
  20. 20.🧩 Which component limits the current? (a) fuse (b) potentiometer (c) resistor (d) motor
  21. 21.True or false: an LDR senses how bright it is. (a) True (b) False
  22. 22.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a buzzer (c) a diode (d) a capacitor
  23. 23.🧩 Which component smooths a wobbly supply? (a) thermistor (b) LED (c) potentiometer (d) capacitor
  24. 24.True or false: a resistor stores a little charge. (a) False (b) True
  25. 25.True or false: a buzzer makes a beeping sound. (a) False (b) True
  26. 26.What does an LED do? (a) lets current go one way (b) senses how bright it is (c) glows using little power (d) smooths a wobbly supply
  27. 27.What does a buzzer do? (a) stores a little charge (b) limits the current (c) beeps for an alarm (d) senses how bright it is
  28. 28.What does a resistor do? (a) turns a fan or wheels (b) stores a little charge (c) lets current go one way (d) limits the current
  29. 29.True or false: a diode boosts a small signal. (a) False (b) True
  30. 30.What does a buzzer do? (a) stores a little charge (b) is a resistance knob (c) smooths a wobbly supply (d) makes a beeping sound
  31. 31.🧩 Which component turns a fan or wheels? (a) LDR (b) buzzer (c) motor (d) thermistor
  32. 32.True or false: a thermistor has coloured bands. (a) False (b) True
  33. 33.What does a capacitor do? (a) blows if current is high (b) has coloured bands (c) stores a little charge (d) glows using little power
  34. 34.True or false: a diode senses how hot it is. (a) True (b) False
  35. 35.🧩 Which component senses how bright it is? (a) potentiometer (b) buzzer (c) transistor (d) LDR
  36. 36.True or false: an LED makes a beeping sound. (a) False (b) True
  37. 37.True or false: a transistor boosts a small signal. (a) False (b) True
  38. 38.🧩 Which component lets current go one way? (a) LDR (b) diode (c) thermistor (d) resistor
  39. 39.True or false: an LED glows using little power. (a) True (b) False
  40. 40.True or false: a capacitor stores a little charge. (a) True (b) False

Answer key

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

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