← Electronic components lesson New set →

Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 604 · 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.🧩 Which part changes electrical energy into movement? (a) an LED (b) a fuse (c) a motor (d) a resistor
  2. 2.🧩 Which component has coloured bands? (a) resistor (b) thermistor (c) diode (d) transistor
  3. 3.True or false: a transistor boosts a small signal. (a) True (b) False
  4. 4.🧩 Which component makes a beeping sound? (a) resistor (b) diode (c) buzzer (d) potentiometer
  5. 5.True or false: a potentiometer is a resistance knob. (a) False (b) True
  6. 6.🧩 A capacitor in a circuit can … (a) store charge briefly (b) make light (c) spin a wheel (d) measure heat
  7. 7.What does a resistor do? (a) lets current go one way (b) limits the current (c) is a resistance knob (d) turns a fan or wheels
  8. 8.🧩 Which component limits the current? (a) potentiometer (b) motor (c) resistor (d) LED
  9. 9.What does an LDR do? (a) senses how bright it is (b) has coloured bands (c) glows using little power (d) makes a beeping sound
  10. 10.🧩 Which component lets current go one way? (a) diode (b) fuse (c) transistor (d) potentiometer
  11. 11.True or false: a diode smooths a wobbly supply. (a) False (b) True
  12. 12.🧩 Which component blows if current is high? (a) fuse (b) motor (c) potentiometer (d) LDR
  13. 13.True or false: an LED glows using little power. (a) False (b) True
  14. 14.What does a fuse do? (a) blows if current is high (b) smooths a wobbly supply (c) is a resistance knob (d) beeps for an alarm
  15. 15.🧩 Which component senses how hot it is? (a) thermistor (b) potentiometer (c) motor (d) transistor
  16. 16.What does a thermistor do? (a) has coloured bands (b) lets current go one way (c) senses how hot it is (d) turns a fan or wheels
  17. 17.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
  18. 18.True or false: an LDR senses how bright it is. (a) True (b) False
  19. 19.What does a motor do? (a) makes things spin (b) glows using little power (c) boosts a small signal (d) beeps for an alarm
  20. 20.True or false: a resistor boosts a small signal. (a) True (b) False
  21. 21.🧩 Which part changes electrical energy into sound? (a) a buzzer (b) a diode (c) a resistor (d) a capacitor
  22. 22.🧩 Which component boosts a small signal? (a) thermistor (b) motor (c) transistor (d) capacitor
  23. 23.What does a buzzer do? (a) beeps for an alarm (b) stores a little charge (c) makes things spin (d) smooths a wobbly supply
  24. 24.What does a capacitor do? (a) makes things spin (b) glows using little power (c) makes a beeping sound (d) smooths a wobbly supply
  25. 25.What does a diode do? (a) boosts a small signal (b) makes a beeping sound (c) blows if current is high (d) lets current go one way
  26. 26.True or false: a buzzer smooths a wobbly supply. (a) True (b) False
  27. 27.🧩 Which component turns a fan or wheels? (a) motor (b) resistor (c) thermistor (d) capacitor
  28. 28.🧩 Which component senses how bright it is? (a) LED (b) transistor (c) diode (d) LDR
  29. 29.🧩 Which component smooths a wobbly supply? (a) LDR (b) diode (c) capacitor (d) buzzer
  30. 30.True or false: a potentiometer has coloured bands. (a) True (b) False
  31. 31.🧩 Which component stores a little charge? (a) potentiometer (b) motor (c) transistor (d) capacitor
  32. 32.True or false: a motor glows using little power. (a) True (b) False
  33. 33.🧩 Which component makes things spin? (a) LDR (b) transistor (c) motor (d) diode
  34. 34.True or false: a resistor smooths a wobbly supply. (a) True (b) False
  35. 35.True or false: a capacitor blows if current is high. (a) False (b) True
  36. 36.True or false: a motor turns a fan or wheels. (a) True (b) False
  37. 37.🧩 Which component glows using little power? (a) thermistor (b) motor (c) transistor (d) LED
  38. 38.What does a capacitor do? (a) senses how hot it is (b) glows using little power (c) lets current go one way (d) stores a little charge
  39. 39.True or false: a thermistor turns a fan or wheels. (a) False (b) True
  40. 40.What does an LED do? (a) stores a little charge (b) smooths a wobbly supply (c) glows using little power (d) turns a fan or wheels

Answer key

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

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