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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 338 · 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) potentiometer (b) transistor (c) motor (d) buzzer
  2. 2.🧩 Which component has coloured bands? (a) LDR (b) resistor (c) motor (d) fuse
  3. 3.🧩 Which component lets current go one way? (a) buzzer (b) motor (c) diode (d) potentiometer
  4. 4.What does a diode do? (a) lets current go one way (b) beeps for an alarm (c) turns a fan or wheels (d) stores a little charge
  5. 5.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a buzzer (c) a resistor (d) a diode
  6. 6.What does a potentiometer do? (a) blows if current is high (b) boosts a small signal (c) is a resistance knob (d) beeps for an alarm
  7. 7.True or false: a diode lets current go one way. (a) False (b) True
  8. 8.🧩 Which component stores a little charge? (a) fuse (b) resistor (c) motor (d) capacitor
  9. 9.What does a buzzer do? (a) makes things spin (b) senses how bright it is (c) smooths a wobbly supply (d) makes a beeping sound
  10. 10.🧩 A capacitor in a circuit can … (a) spin a wheel (b) measure heat (c) store charge briefly (d) make light
  11. 11.True or false: a transistor has coloured bands. (a) False (b) True
  12. 12.🧩 Which component beeps for an alarm? (a) potentiometer (b) thermistor (c) buzzer (d) fuse
  13. 13.True or false: a motor limits the current. (a) True (b) False
  14. 14.What does a capacitor do? (a) turns a fan or wheels (b) stores a little charge (c) senses how bright it is (d) makes a beeping sound
  15. 15.🧩 Which component senses how hot it is? (a) diode (b) transistor (c) LED (d) thermistor
  16. 16.True or false: an LDR senses how bright it is. (a) True (b) False
  17. 17.What does a fuse do? (a) makes things spin (b) blows if current is high (c) has coloured bands (d) senses how hot it is
  18. 18.What does a buzzer do? (a) senses how hot it is (b) has coloured bands (c) stores a little charge (d) beeps for an alarm
  19. 19.🧩 Which component smooths a wobbly supply? (a) capacitor (b) LDR (c) thermistor (d) motor
  20. 20.True or false: a fuse blows if current is high. (a) False (b) True
  21. 21.What does a resistor do? (a) beeps for an alarm (b) smooths a wobbly supply (c) lets current go one way (d) has coloured bands
  22. 22.🧩 Which part changes electrical energy into movement? (a) an LED (b) a fuse (c) a resistor (d) a motor
  23. 23.🧩 Which component is a resistance knob? (a) capacitor (b) LDR (c) thermistor (d) potentiometer
  24. 24.True or false: an LDR makes things spin. (a) False (b) True
  25. 25.True or false: a transistor glows using little power. (a) True (b) False
  26. 26.True or false: a motor turns a fan or wheels. (a) False (b) True
  27. 27.🧩 Which component turns a fan or wheels? (a) diode (b) motor (c) fuse (d) transistor
  28. 28.True or false: a resistor has coloured bands. (a) False (b) True
  29. 29.True or false: a buzzer beeps for an alarm. (a) True (b) False
  30. 30.🧩 Which component glows using little power? (a) potentiometer (b) LED (c) motor (d) resistor
  31. 31.True or false: a thermistor smooths a wobbly supply. (a) True (b) False
  32. 32.🧩 Which component blows if current is high? (a) potentiometer (b) fuse (c) LDR (d) resistor
  33. 33.True or false: a transistor senses how bright it is. (a) True (b) False
  34. 34.What does a transistor do? (a) glows using little power (b) beeps for an alarm (c) boosts a small signal (d) makes a beeping sound
  35. 35.What does an LED do? (a) glows using little power (b) makes things spin (c) turns a fan or wheels (d) senses how hot it is
  36. 36.True or false: a thermistor makes a beeping sound. (a) True (b) False
  37. 37.What does a resistor do? (a) is a resistance knob (b) senses how bright it is (c) beeps for an alarm (d) limits the current
  38. 38.True or false: a diode lets current go one way. (a) False (b) True
  39. 39.True or false: a transistor senses how hot it is. (a) True (b) False
  40. 40.True or false: a capacitor smooths a wobbly supply. (a) False (b) True

Answer key

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

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