← Electronic components lesson New set →

Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 460 · 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 fuse blows if current is high. (a) False (b) True
  2. 2.🧩 A capacitor in a circuit can … (a) spin a wheel (b) make light (c) store charge briefly (d) measure heat
  3. 3.🧩 Which component boosts a small signal? (a) capacitor (b) fuse (c) motor (d) transistor
  4. 4.What does an LED do? (a) glows using little power (b) boosts a small signal (c) has coloured bands (d) blows if current is high
  5. 5.What does a transistor do? (a) stores a little charge (b) makes a beeping sound (c) boosts a small signal (d) makes things spin
  6. 6.What does a potentiometer do? (a) limits the current (b) turns a fan or wheels (c) is a resistance knob (d) senses how hot it is
  7. 7.🧩 Which component makes things spin? (a) transistor (b) LDR (c) fuse (d) motor
  8. 8.🧩 Which part changes electrical energy into movement? (a) an LED (b) a resistor (c) a fuse (d) a motor
  9. 9.🧩 Which component blows if current is high? (a) fuse (b) capacitor (c) motor (d) LDR
  10. 10.🧩 Which component smooths a wobbly supply? (a) thermistor (b) LDR (c) resistor (d) capacitor
  11. 11.What does a diode do? (a) smooths a wobbly supply (b) makes a beeping sound (c) lets current go one way (d) beeps for an alarm
  12. 12.What does a fuse do? (a) makes a beeping sound (b) blows if current is high (c) stores a little charge (d) senses how bright it is
  13. 13.True or false: a capacitor makes a beeping sound. (a) False (b) True
  14. 14.True or false: a motor makes things spin. (a) True (b) False
  15. 15.True or false: a thermistor makes things spin. (a) True (b) False
  16. 16.🧩 Which component makes a beeping sound? (a) fuse (b) buzzer (c) resistor (d) diode
  17. 17.True or false: a thermistor senses how hot it is. (a) False (b) True
  18. 18.🧩 Which component glows using little power? (a) buzzer (b) potentiometer (c) LED (d) capacitor
  19. 19.🧩 Which component stores a little charge? (a) potentiometer (b) resistor (c) capacitor (d) motor
  20. 20.True or false: an LED glows using little power. (a) False (b) True
  21. 21.True or false: an LDR smooths a wobbly supply. (a) False (b) True
  22. 22.True or false: an LED boosts a small signal. (a) True (b) False
  23. 23.🧩 Which component has coloured bands? (a) fuse (b) LDR (c) LED (d) resistor
  24. 24.What does a motor do? (a) boosts a small signal (b) blows if current is high (c) senses how bright it is (d) makes things spin
  25. 25.What does a resistor do? (a) smooths a wobbly supply (b) boosts a small signal (c) has coloured bands (d) senses how hot it is
  26. 26.True or false: a capacitor has coloured bands. (a) True (b) False
  27. 27.True or false: a transistor boosts a small signal. (a) False (b) True
  28. 28.True or false: an LED beeps for an alarm. (a) False (b) True
  29. 29.What does a capacitor do? (a) makes a beeping sound (b) stores a little charge (c) limits the current (d) beeps for an alarm
  30. 30.What does a resistor do? (a) limits the current (b) smooths a wobbly supply (c) beeps for an alarm (d) boosts a small signal
  31. 31.What does a capacitor do? (a) makes things spin (b) smooths a wobbly supply (c) has coloured bands (d) makes a beeping sound
  32. 32.True or false: a resistor has coloured bands. (a) True (b) False
  33. 33.What does a buzzer do? (a) stores a little charge (b) beeps for an alarm (c) glows using little power (d) has coloured bands
  34. 34.True or false: a fuse turns a fan or wheels. (a) False (b) True
  35. 35.🧩 Which component beeps for an alarm? (a) LDR (b) resistor (c) transistor (d) buzzer
  36. 36.True or false: a fuse makes a beeping sound. (a) False (b) True
  37. 37.What does a motor do? (a) turns a fan or wheels (b) lets current go one way (c) senses how bright it is (d) has coloured bands
  38. 38.🧩 Which component lets current go one way? (a) buzzer (b) fuse (c) diode (d) transistor
  39. 39.🧩 Which component turns a fan or wheels? (a) resistor (b) potentiometer (c) thermistor (d) motor
  40. 40.True or false: a diode turns a fan or wheels. (a) False (b) True

Answer key

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

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