← Electronic components lesson New set →

Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 450 · 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 capacitor smooths a wobbly supply. (a) True (b) False
  2. 2.🧩 Which component makes things spin? (a) transistor (b) diode (c) motor (d) fuse
  3. 3.🧩 Which component blows if current is high? (a) fuse (b) LED (c) capacitor (d) diode
  4. 4.🧩 Which component smooths a wobbly supply? (a) thermistor (b) capacitor (c) potentiometer (d) fuse
  5. 5.True or false: an LDR senses how hot it is. (a) True (b) False
  6. 6.What does a resistor do? (a) beeps for an alarm (b) stores a little charge (c) has coloured bands (d) glows using little power
  7. 7.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a resistor (c) a buzzer (d) a diode
  8. 8.🧩 A capacitor in a circuit can … (a) spin a wheel (b) store charge briefly (c) make light (d) measure heat
  9. 9.True or false: a resistor has coloured bands. (a) False (b) True
  10. 10.True or false: a fuse smooths a wobbly supply. (a) True (b) False
  11. 11.True or false: a resistor blows if current is high. (a) False (b) True
  12. 12.True or false: a fuse is a resistance knob. (a) True (b) False
  13. 13.What does a fuse do? (a) smooths a wobbly supply (b) has coloured bands (c) blows if current is high (d) senses how bright it is
  14. 14.What does an LED do? (a) glows using little power (b) turns a fan or wheels (c) blows if current is high (d) makes things spin
  15. 15.What does a buzzer do? (a) lets current go one way (b) makes a beeping sound (c) senses how hot it is (d) makes things spin
  16. 16.What does a capacitor do? (a) smooths a wobbly supply (b) has coloured bands (c) makes things spin (d) lets current go one way
  17. 17.What does a buzzer do? (a) lets current go one way (b) beeps for an alarm (c) makes things spin (d) senses how bright it is
  18. 18.True or false: an LED makes things spin. (a) True (b) False
  19. 19.🧩 Which component beeps for an alarm? (a) transistor (b) diode (c) LDR (d) buzzer
  20. 20.🧩 Which part changes electrical energy into movement? (a) an LED (b) a motor (c) a resistor (d) a fuse
  21. 21.True or false: an LED beeps for an alarm. (a) False (b) True
  22. 22.True or false: a potentiometer is a resistance knob. (a) True (b) False
  23. 23.True or false: a capacitor blows if current is high. (a) False (b) True
  24. 24.True or false: an LDR senses how bright it is. (a) True (b) False
  25. 25.🧩 Which component limits the current? (a) transistor (b) LED (c) resistor (d) fuse
  26. 26.True or false: a diode senses how bright it is. (a) True (b) False
  27. 27.🧩 Which component stores a little charge? (a) diode (b) buzzer (c) LDR (d) capacitor
  28. 28.🧩 Which component is a resistance knob? (a) capacitor (b) buzzer (c) potentiometer (d) fuse
  29. 29.What does an LDR do? (a) makes things spin (b) senses how bright it is (c) is a resistance knob (d) blows if current is high
  30. 30.🧩 Which component boosts a small signal? (a) diode (b) transistor (c) buzzer (d) fuse
  31. 31.🧩 Which component turns a fan or wheels? (a) capacitor (b) potentiometer (c) motor (d) LED
  32. 32.What does a resistor do? (a) makes things spin (b) limits the current (c) blows if current is high (d) boosts a small signal
  33. 33.True or false: a buzzer is a resistance knob. (a) True (b) False
  34. 34.True or false: a buzzer limits the current. (a) False (b) True
  35. 35.True or false: a potentiometer stores a little charge. (a) True (b) False
  36. 36.True or false: an LDR makes things spin. (a) False (b) True
  37. 37.What does a thermistor do? (a) stores a little charge (b) has coloured bands (c) glows using little power (d) senses how hot it is
  38. 38.What does a motor do? (a) makes things spin (b) smooths a wobbly supply (c) blows if current is high (d) makes a beeping sound
  39. 39.🧩 Which component glows using little power? (a) LED (b) fuse (c) capacitor (d) buzzer
  40. 40.🧩 Which component has coloured bands? (a) potentiometer (b) capacitor (c) resistor (d) diode

Answer key

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

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