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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 365 · 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.🧩 A capacitor in a circuit can … (a) store charge briefly (b) make light (c) measure heat (d) spin a wheel
  2. 2.What does a thermistor do? (a) boosts a small signal (b) smooths a wobbly supply (c) limits the current (d) senses how hot it is
  3. 3.🧩 Which component makes a beeping sound? (a) diode (b) buzzer (c) fuse (d) LED
  4. 4.What does an LED do? (a) senses how hot it is (b) beeps for an alarm (c) limits the current (d) glows using little power
  5. 5.What does a diode do? (a) turns a fan or wheels (b) has coloured bands (c) senses how bright it is (d) lets current go one way
  6. 6.What does a potentiometer do? (a) stores a little charge (b) lets current go one way (c) is a resistance knob (d) has coloured bands
  7. 7.🧩 Which component senses how hot it is? (a) potentiometer (b) LDR (c) thermistor (d) motor
  8. 8.True or false: a diode has coloured bands. (a) False (b) True
  9. 9.🧩 Which component smooths a wobbly supply? (a) diode (b) transistor (c) fuse (d) capacitor
  10. 10.🧩 Which component turns a fan or wheels? (a) buzzer (b) motor (c) resistor (d) thermistor
  11. 11.🧩 Which component beeps for an alarm? (a) capacitor (b) buzzer (c) LED (d) motor
  12. 12.True or false: a transistor glows using little power. (a) True (b) False
  13. 13.🧩 Which component glows using little power? (a) capacitor (b) diode (c) LED (d) buzzer
  14. 14.🧩 Which component makes things spin? (a) motor (b) resistor (c) diode (d) capacitor
  15. 15.True or false: a transistor makes things spin. (a) True (b) False
  16. 16.What does an LDR do? (a) makes things spin (b) limits the current (c) has coloured bands (d) senses how bright it is
  17. 17.True or false: a transistor boosts a small signal. (a) True (b) False
  18. 18.What does a buzzer do? (a) glows using little power (b) has coloured bands (c) makes a beeping sound (d) limits the current
  19. 19.What does a fuse do? (a) glows using little power (b) blows if current is high (c) has coloured bands (d) limits the current
  20. 20.🧩 Which component senses how bright it is? (a) LDR (b) resistor (c) buzzer (d) fuse
  21. 21.🧩 Which part changes electrical energy into sound? (a) a buzzer (b) a diode (c) a resistor (d) a capacitor
  22. 22.True or false: a motor smooths a wobbly supply. (a) True (b) False
  23. 23.True or false: a capacitor stores a little charge. (a) True (b) False
  24. 24.🧩 Which component lets current go one way? (a) fuse (b) capacitor (c) potentiometer (d) diode
  25. 25.What does a resistor do? (a) stores a little charge (b) lets current go one way (c) has coloured bands (d) smooths a wobbly supply
  26. 26.🧩 Which component has coloured bands? (a) diode (b) capacitor (c) buzzer (d) resistor
  27. 27.True or false: a buzzer limits the current. (a) True (b) False
  28. 28.True or false: a potentiometer smooths a wobbly supply. (a) False (b) True
  29. 29.True or false: a thermistor lets current go one way. (a) False (b) True
  30. 30.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
  31. 31.True or false: a buzzer makes a beeping sound. (a) False (b) True
  32. 32.🧩 Which component limits the current? (a) capacitor (b) resistor (c) transistor (d) potentiometer
  33. 33.True or false: an LED glows using little power. (a) True (b) False
  34. 34.True or false: a buzzer has coloured bands. (a) False (b) True
  35. 35.True or false: a potentiometer senses how bright it is. (a) True (b) False
  36. 36.🧩 Which component blows if current is high? (a) LDR (b) motor (c) potentiometer (d) fuse
  37. 37.🧩 Which part changes electrical energy into movement? (a) a resistor (b) a fuse (c) an LED (d) a motor
  38. 38.True or false: a resistor has coloured bands. (a) False (b) True
  39. 39.True or false: a fuse blows if current is high. (a) True (b) False
  40. 40.What does a buzzer do? (a) has coloured bands (b) beeps for an alarm (c) lets current go one way (d) glows using little power

Answer key

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

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