← Electronic components lesson New set →

Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 143 · 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 makes a beeping sound? (a) resistor (b) motor (c) buzzer (d) transistor
  2. 2.🧩 Which component boosts a small signal? (a) transistor (b) buzzer (c) thermistor (d) capacitor
  3. 3.🧩 Which part changes electrical energy into sound? (a) a buzzer (b) a capacitor (c) a diode (d) a resistor
  4. 4.True or false: a motor limits the current. (a) False (b) True
  5. 5.🧩 Which component beeps for an alarm? (a) resistor (b) buzzer (c) LDR (d) fuse
  6. 6.True or false: a resistor has coloured bands. (a) False (b) True
  7. 7.🧩 Which component makes things spin? (a) transistor (b) thermistor (c) motor (d) capacitor
  8. 8.🧩 Which component stores a little charge? (a) transistor (b) LDR (c) capacitor (d) motor
  9. 9.What does a motor do? (a) senses how hot it is (b) limits the current (c) makes a beeping sound (d) turns a fan or wheels
  10. 10.What does a motor do? (a) makes things spin (b) smooths a wobbly supply (c) senses how hot it is (d) lets current go one way
  11. 11.🧩 Which component smooths a wobbly supply? (a) motor (b) fuse (c) capacitor (d) diode
  12. 12.🧩 Which component senses how bright it is? (a) LDR (b) buzzer (c) capacitor (d) motor
  13. 13.🧩 A capacitor in a circuit can … (a) spin a wheel (b) make light (c) store charge briefly (d) measure heat
  14. 14.🧩 Which component glows using little power? (a) thermistor (b) diode (c) LED (d) potentiometer
  15. 15.🧩 Which part changes electrical energy into movement? (a) a motor (b) a fuse (c) a resistor (d) an LED
  16. 16.What does an LDR do? (a) boosts a small signal (b) glows using little power (c) senses how bright it is (d) limits the current
  17. 17.What does a resistor do? (a) senses how hot it is (b) makes a beeping sound (c) has coloured bands (d) smooths a wobbly supply
  18. 18.🧩 Which component has coloured bands? (a) potentiometer (b) capacitor (c) resistor (d) buzzer
  19. 19.🧩 Which component turns a fan or wheels? (a) LED (b) potentiometer (c) thermistor (d) motor
  20. 20.True or false: a resistor senses how hot it is. (a) True (b) False
  21. 21.What does an LED do? (a) glows using little power (b) senses how bright it is (c) stores a little charge (d) blows if current is high
  22. 22.True or false: a motor turns a fan or wheels. (a) True (b) False
  23. 23.True or false: a buzzer senses how hot it is. (a) True (b) False
  24. 24.True or false: a buzzer makes a beeping sound. (a) False (b) True
  25. 25.True or false: a capacitor makes a beeping sound. (a) False (b) True
  26. 26.What does a capacitor do? (a) makes things spin (b) smooths a wobbly supply (c) has coloured bands (d) limits the current
  27. 27.True or false: a thermistor makes a beeping sound. (a) False (b) True
  28. 28.What does a transistor do? (a) senses how hot it is (b) blows if current is high (c) boosts a small signal (d) has coloured bands
  29. 29.🧩 Which component is a resistance knob? (a) transistor (b) resistor (c) potentiometer (d) LED
  30. 30.What does a buzzer do? (a) blows if current is high (b) beeps for an alarm (c) is a resistance knob (d) smooths a wobbly supply
  31. 31.🧩 Which component lets current go one way? (a) LDR (b) fuse (c) diode (d) buzzer
  32. 32.🧩 Which component blows if current is high? (a) fuse (b) capacitor (c) motor (d) potentiometer
  33. 33.True or false: a capacitor smooths a wobbly supply. (a) True (b) False
  34. 34.What does a resistor do? (a) limits the current (b) beeps for an alarm (c) smooths a wobbly supply (d) lets current go one way
  35. 35.🧩 Which component limits the current? (a) diode (b) resistor (c) capacitor (d) fuse
  36. 36.What does a capacitor do? (a) stores a little charge (b) blows if current is high (c) lets current go one way (d) turns a fan or wheels
  37. 37.True or false: a buzzer smooths a wobbly supply. (a) False (b) True
  38. 38.🧩 Which component senses how hot it is? (a) LDR (b) thermistor (c) buzzer (d) fuse
  39. 39.True or false: a resistor beeps for an alarm. (a) False (b) True
  40. 40.True or false: a resistor glows using little power. (a) True (b) False

Answer key

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

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