← Electronic components lesson New set →

Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 92 · 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.

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

Answer key

  1. False
  2. LED
  3. is a resistance knob
  4. senses how bright it is
  5. False
  6. a buzzer
  7. resistor
  8. True
  9. store charge briefly
  10. LDR
  11. blows if current is high
  12. False
  13. lets current go one way
  14. resistor
  15. True
  16. True
  17. potentiometer
  18. False
  19. buzzer
  20. False
  21. True
  22. motor
  23. False
  24. limits the current
  25. capacitor
  26. turns a fan or wheels
  27. buzzer
  28. boosts a small signal
  29. a motor
  30. False
  31. False
  32. False
  33. False
  34. makes a beeping sound
  35. True
  36. False
  37. capacitor
  38. senses how hot it is
  39. False
  40. stores a little charge

Free electronics lessons, practice and worksheets at talentjr.in/electronics-for-kids