← Electronic components lesson New set →

Electronics Worksheet: Electronic Components

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

Answer key

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

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