← Electronic components lesson New set →

Electronics Worksheet: Electronic Components

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

Answer key

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

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