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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 525 · 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 smooths a wobbly supply? (a) capacitor (b) diode (c) resistor (d) motor
  2. 2.🧩 Which component has coloured bands? (a) LDR (b) buzzer (c) resistor (d) potentiometer
  3. 3.What does a buzzer do? (a) turns a fan or wheels (b) senses how bright it is (c) glows using little power (d) beeps for an alarm
  4. 4.🧩 A capacitor in a circuit can … (a) make light (b) spin a wheel (c) measure heat (d) store charge briefly
  5. 5.What does a diode do? (a) glows using little power (b) lets current go one way (c) makes things spin (d) senses how bright it is
  6. 6.True or false: a resistor has coloured bands. (a) False (b) True
  7. 7.🧩 Which component glows using little power? (a) diode (b) buzzer (c) fuse (d) LED
  8. 8.🧩 Which component makes things spin? (a) LED (b) potentiometer (c) motor (d) LDR
  9. 9.🧩 Which component senses how bright it is? (a) potentiometer (b) transistor (c) LDR (d) fuse
  10. 10.What does a potentiometer do? (a) senses how bright it is (b) glows using little power (c) boosts a small signal (d) is a resistance knob
  11. 11.🧩 Which component is a resistance knob? (a) LDR (b) LED (c) buzzer (d) potentiometer
  12. 12.True or false: a fuse stores a little charge. (a) True (b) False
  13. 13.True or false: a motor beeps for an alarm. (a) False (b) True
  14. 14.🧩 Which part changes electrical energy into movement? (a) a resistor (b) a motor (c) an LED (d) a fuse
  15. 15.True or false: an LED has coloured bands. (a) False (b) True
  16. 16.🧩 Which component boosts a small signal? (a) buzzer (b) fuse (c) transistor (d) LDR
  17. 17.What does a thermistor do? (a) senses how hot it is (b) glows using little power (c) makes things spin (d) lets current go one way
  18. 18.What does a buzzer do? (a) limits the current (b) makes things spin (c) lets current go one way (d) makes a beeping sound
  19. 19.True or false: a capacitor senses how hot it is. (a) True (b) False
  20. 20.What does a capacitor do? (a) has coloured bands (b) stores a little charge (c) boosts a small signal (d) makes a beeping sound
  21. 21.🧩 Which component limits the current? (a) resistor (b) LED (c) fuse (d) transistor
  22. 22.🧩 Which component lets current go one way? (a) resistor (b) potentiometer (c) transistor (d) diode
  23. 23.What does a resistor do? (a) beeps for an alarm (b) senses how hot it is (c) is a resistance knob (d) has coloured bands
  24. 24.🧩 Which component senses how hot it is? (a) motor (b) transistor (c) thermistor (d) potentiometer
  25. 25.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a resistor (c) a buzzer (d) a diode
  26. 26.What does an LDR do? (a) senses how bright it is (b) stores a little charge (c) lets current go one way (d) limits the current
  27. 27.What does an LED do? (a) has coloured bands (b) glows using little power (c) limits the current (d) smooths a wobbly supply
  28. 28.What does a resistor do? (a) stores a little charge (b) limits the current (c) lets current go one way (d) is a resistance knob
  29. 29.True or false: a potentiometer is a resistance knob. (a) True (b) False
  30. 30.True or false: an LED makes things spin. (a) True (b) False
  31. 31.🧩 Which component beeps for an alarm? (a) diode (b) buzzer (c) capacitor (d) transistor
  32. 32.True or false: a thermistor makes a beeping sound. (a) True (b) False
  33. 33.🧩 Which component turns a fan or wheels? (a) LED (b) motor (c) thermistor (d) resistor
  34. 34.True or false: a motor makes things spin. (a) False (b) True
  35. 35.True or false: a thermistor senses how hot it is. (a) True (b) False
  36. 36.True or false: an LED glows using little power. (a) False (b) True
  37. 37.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
  38. 38.🧩 Which component blows if current is high? (a) potentiometer (b) thermistor (c) LDR (d) fuse
  39. 39.True or false: a motor lets current go one way. (a) True (b) False
  40. 40.What does a transistor do? (a) lets current go one way (b) has coloured bands (c) boosts a small signal (d) stores a little charge

Answer key

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

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