← Electronic components lesson New set →

Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 523 · 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 blows if current is high? (a) transistor (b) motor (c) buzzer (d) fuse
  2. 2.🧩 Which component stores a little charge? (a) diode (b) capacitor (c) thermistor (d) fuse
  3. 3.What does a potentiometer do? (a) glows using little power (b) smooths a wobbly supply (c) senses how bright it is (d) is a resistance knob
  4. 4.🧩 Which component lets current go one way? (a) fuse (b) capacitor (c) thermistor (d) diode
  5. 5.🧩 Which part changes electrical energy into movement? (a) an LED (b) a resistor (c) a fuse (d) a motor
  6. 6.What does an LED do? (a) smooths a wobbly supply (b) makes things spin (c) has coloured bands (d) glows using little power
  7. 7.🧩 Which component beeps for an alarm? (a) resistor (b) fuse (c) diode (d) buzzer
  8. 8.What does a transistor do? (a) blows if current is high (b) limits the current (c) senses how hot it is (d) boosts a small signal
  9. 9.🧩 Which component makes a beeping sound? (a) transistor (b) buzzer (c) potentiometer (d) LED
  10. 10.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a resistor (c) a buzzer (d) a diode
  11. 11.True or false: an LDR senses how bright it is. (a) False (b) True
  12. 12.🧩 Which component senses how bright it is? (a) transistor (b) capacitor (c) LDR (d) LED
  13. 13.🧩 Which component limits the current? (a) diode (b) LED (c) thermistor (d) resistor
  14. 14.What does a buzzer do? (a) senses how bright it is (b) makes a beeping sound (c) turns a fan or wheels (d) stores a little charge
  15. 15.🧩 A capacitor in a circuit can … (a) store charge briefly (b) make light (c) measure heat (d) spin a wheel
  16. 16.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
  17. 17.True or false: a capacitor blows if current is high. (a) False (b) True
  18. 18.🧩 Which component turns a fan or wheels? (a) resistor (b) LED (c) buzzer (d) motor
  19. 19.True or false: a thermistor senses how hot it is. (a) False (b) True
  20. 20.What does a capacitor do? (a) limits the current (b) lets current go one way (c) makes a beeping sound (d) stores a little charge
  21. 21.True or false: a potentiometer makes things spin. (a) True (b) False
  22. 22.🧩 Which component glows using little power? (a) transistor (b) resistor (c) LED (d) motor
  23. 23.True or false: a motor makes things spin. (a) True (b) False
  24. 24.True or false: a motor smooths a wobbly supply. (a) True (b) False
  25. 25.What does a diode do? (a) boosts a small signal (b) limits the current (c) lets current go one way (d) senses how bright it is
  26. 26.🧩 Which component makes things spin? (a) motor (b) fuse (c) potentiometer (d) capacitor
  27. 27.True or false: a motor senses how hot it is. (a) False (b) True
  28. 28.🧩 Which component senses how hot it is? (a) diode (b) transistor (c) thermistor (d) motor
  29. 29.True or false: a resistor has coloured bands. (a) True (b) False
  30. 30.What does an LDR do? (a) senses how bright it is (b) senses how hot it is (c) stores a little charge (d) turns a fan or wheels
  31. 31.True or false: a resistor makes a beeping sound. (a) True (b) False
  32. 32.What does a resistor do? (a) limits the current (b) senses how hot it is (c) senses how bright it is (d) blows if current is high
  33. 33.True or false: an LED glows using little power. (a) True (b) False
  34. 34.What does a resistor do? (a) glows using little power (b) smooths a wobbly supply (c) turns a fan or wheels (d) has coloured bands
  35. 35.What does a thermistor do? (a) beeps for an alarm (b) senses how hot it is (c) blows if current is high (d) glows using little power
  36. 36.True or false: a capacitor stores a little charge. (a) True (b) False
  37. 37.True or false: a motor has coloured bands. (a) True (b) False
  38. 38.🧩 Which component has coloured bands? (a) fuse (b) transistor (c) resistor (d) LED
  39. 39.True or false: a thermistor has coloured bands. (a) False (b) True
  40. 40.True or false: a potentiometer makes a beeping sound. (a) True (b) False

Answer key

  1. fuse
  2. capacitor
  3. is a resistance knob
  4. diode
  5. a motor
  6. glows using little power
  7. buzzer
  8. boosts a small signal
  9. buzzer
  10. a buzzer
  11. True
  12. LDR
  13. resistor
  14. makes a beeping sound
  15. store charge briefly
  16. True
  17. False
  18. motor
  19. True
  20. stores a little charge
  21. False
  22. LED
  23. True
  24. False
  25. lets current go one way
  26. motor
  27. False
  28. thermistor
  29. True
  30. senses how bright it is
  31. False
  32. limits the current
  33. True
  34. has coloured bands
  35. senses how hot it is
  36. True
  37. False
  38. resistor
  39. False
  40. False

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