← Electronic components lesson New set →

Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 359 · 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 component stores a little charge? (a) capacitor (b) buzzer (c) fuse (d) potentiometer
  2. 2.What does a diode do? (a) has coloured bands (b) beeps for an alarm (c) limits the current (d) lets current go one way
  3. 3.True or false: a resistor has coloured bands. (a) True (b) False
  4. 4.True or false: an LDR glows using little power. (a) False (b) True
  5. 5.What does a thermistor do? (a) lets current go one way (b) stores a little charge (c) senses how hot it is (d) blows if current is high
  6. 6.True or false: a thermistor is a resistance knob. (a) True (b) False
  7. 7.True or false: an LDR senses how bright it is. (a) True (b) False
  8. 8.🧩 Which part changes electrical energy into sound? (a) a diode (b) a resistor (c) a capacitor (d) a buzzer
  9. 9.🧩 Which component is a resistance knob? (a) resistor (b) potentiometer (c) LED (d) diode
  10. 10.True or false: a capacitor smooths a wobbly supply. (a) True (b) False
  11. 11.True or false: a capacitor stores a little charge. (a) False (b) True
  12. 12.True or false: a potentiometer lets current go one way. (a) False (b) True
  13. 13.What does an LED do? (a) beeps for an alarm (b) glows using little power (c) stores a little charge (d) smooths a wobbly supply
  14. 14.True or false: a diode lets current go one way. (a) True (b) False
  15. 15.True or false: an LED glows using little power. (a) False (b) True
  16. 16.True or false: a thermistor senses how hot it is. (a) False (b) True
  17. 17.🧩 Which component beeps for an alarm? (a) buzzer (b) diode (c) potentiometer (d) motor
  18. 18.What does an LDR do? (a) turns a fan or wheels (b) senses how bright it is (c) glows using little power (d) makes things spin
  19. 19.🧩 Which component boosts a small signal? (a) potentiometer (b) transistor (c) fuse (d) buzzer
  20. 20.🧩 Which component smooths a wobbly supply? (a) diode (b) potentiometer (c) transistor (d) capacitor
  21. 21.🧩 Which component glows using little power? (a) resistor (b) LED (c) diode (d) transistor
  22. 22.🧩 Which component turns a fan or wheels? (a) thermistor (b) LDR (c) motor (d) transistor
  23. 23.What does a motor do? (a) turns a fan or wheels (b) stores a little charge (c) lets current go one way (d) blows if current is high
  24. 24.True or false: a fuse senses how hot it is. (a) True (b) False
  25. 25.What does a capacitor do? (a) makes a beeping sound (b) lets current go one way (c) smooths a wobbly supply (d) senses how hot it is
  26. 26.What does a motor do? (a) makes things spin (b) smooths a wobbly supply (c) blows if current is high (d) boosts a small signal
  27. 27.True or false: a transistor boosts a small signal. (a) False (b) True
  28. 28.🧩 Which component has coloured bands? (a) buzzer (b) LDR (c) motor (d) resistor
  29. 29.🧩 Which component lets current go one way? (a) diode (b) thermistor (c) LDR (d) transistor
  30. 30.🧩 A capacitor in a circuit can … (a) measure heat (b) store charge briefly (c) spin a wheel (d) make light
  31. 31.What does a fuse do? (a) glows using little power (b) smooths a wobbly supply (c) blows if current is high (d) stores a little charge
  32. 32.What does a transistor do? (a) stores a little charge (b) boosts a small signal (c) lets current go one way (d) has coloured bands
  33. 33.🧩 Which component blows if current is high? (a) fuse (b) capacitor (c) motor (d) thermistor
  34. 34.What does a resistor do? (a) is a resistance knob (b) has coloured bands (c) makes a beeping sound (d) stores a little charge
  35. 35.True or false: a diode senses how hot it is. (a) True (b) False
  36. 36.🧩 Which part changes electrical energy into movement? (a) a motor (b) a resistor (c) an LED (d) a fuse
  37. 37.True or false: a capacitor senses how hot it is. (a) True (b) False
  38. 38.True or false: a buzzer makes a beeping sound. (a) True (b) False
  39. 39.True or false: a thermistor senses how bright it is. (a) True (b) False
  40. 40.What does a potentiometer do? (a) is a resistance knob (b) senses how hot it is (c) makes things spin (d) stores a little charge

Answer key

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

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