← Electronic components lesson New set →

Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 654 · 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 beeps for an alarm? (a) diode (b) thermistor (c) buzzer (d) potentiometer
  2. 2.🧩 Which component lets current go one way? (a) capacitor (b) diode (c) thermistor (d) transistor
  3. 3.What does a thermistor do? (a) smooths a wobbly supply (b) lets current go one way (c) turns a fan or wheels (d) senses how hot it is
  4. 4.🧩 A capacitor in a circuit can … (a) store charge briefly (b) measure heat (c) make light (d) spin a wheel
  5. 5.True or false: a diode senses how bright it is. (a) True (b) False
  6. 6.🧩 Which component has coloured bands? (a) resistor (b) thermistor (c) LDR (d) potentiometer
  7. 7.🧩 Which component turns a fan or wheels? (a) diode (b) motor (c) resistor (d) buzzer
  8. 8.True or false: a resistor makes things spin. (a) True (b) False
  9. 9.True or false: a thermistor blows if current is high. (a) False (b) True
  10. 10.True or false: a resistor turns a fan or wheels. (a) True (b) False
  11. 11.True or false: a resistor has coloured bands. (a) False (b) True
  12. 12.True or false: a buzzer is a resistance knob. (a) True (b) False
  13. 13.True or false: a fuse blows if current is high. (a) False (b) True
  14. 14.True or false: a resistor lets current go one way. (a) False (b) True
  15. 15.🧩 Which component boosts a small signal? (a) buzzer (b) diode (c) transistor (d) fuse
  16. 16.🧩 Which part changes electrical energy into movement? (a) a fuse (b) an LED (c) a motor (d) a resistor
  17. 17.What does a motor do? (a) boosts a small signal (b) blows if current is high (c) makes a beeping sound (d) turns a fan or wheels
  18. 18.What does a potentiometer do? (a) turns a fan or wheels (b) is a resistance knob (c) boosts a small signal (d) senses how bright it is
  19. 19.🧩 Which part changes electrical energy into sound? (a) a diode (b) a capacitor (c) a buzzer (d) a resistor
  20. 20.What does a transistor do? (a) is a resistance knob (b) makes a beeping sound (c) boosts a small signal (d) limits the current
  21. 21.What does an LED do? (a) boosts a small signal (b) glows using little power (c) senses how bright it is (d) stores a little charge
  22. 22.What does a capacitor do? (a) makes things spin (b) blows if current is high (c) stores a little charge (d) has coloured bands
  23. 23.True or false: a capacitor stores a little charge. (a) False (b) True
  24. 24.🧩 Which component limits the current? (a) potentiometer (b) transistor (c) resistor (d) LED
  25. 25.🧩 Which component blows if current is high? (a) capacitor (b) buzzer (c) fuse (d) LED
  26. 26.What does a buzzer do? (a) is a resistance knob (b) stores a little charge (c) makes a beeping sound (d) blows if current is high
  27. 27.🧩 Which component is a resistance knob? (a) LED (b) transistor (c) potentiometer (d) diode
  28. 28.What does a resistor do? (a) makes things spin (b) has coloured bands (c) lets current go one way (d) senses how hot it is
  29. 29.What does a resistor do? (a) beeps for an alarm (b) limits the current (c) stores a little charge (d) is a resistance knob
  30. 30.True or false: a capacitor limits the current. (a) False (b) True
  31. 31.True or false: a thermistor makes things spin. (a) True (b) False
  32. 32.True or false: a transistor makes things spin. (a) False (b) True
  33. 33.🧩 Which component makes things spin? (a) LDR (b) LED (c) motor (d) diode
  34. 34.What does a fuse do? (a) senses how bright it is (b) boosts a small signal (c) has coloured bands (d) blows if current is high
  35. 35.True or false: a potentiometer senses how hot it is. (a) False (b) True
  36. 36.True or false: a buzzer makes a beeping sound. (a) False (b) True
  37. 37.🧩 Which component glows using little power? (a) LED (b) resistor (c) motor (d) potentiometer
  38. 38.What does a diode do? (a) limits the current (b) senses how bright it is (c) beeps for an alarm (d) lets current go one way
  39. 39.True or false: a motor limits the current. (a) True (b) False
  40. 40.True or false: a fuse has coloured bands. (a) True (b) False

Answer key

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

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