← Electronic components lesson New set →

Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 595 · 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.True or false: a fuse stores a little charge. (a) False (b) True
  2. 2.🧩 Which component is a resistance knob? (a) LED (b) potentiometer (c) fuse (d) buzzer
  3. 3.True or false: a buzzer beeps for an alarm. (a) True (b) False
  4. 4.What does a buzzer do? (a) beeps for an alarm (b) smooths a wobbly supply (c) blows if current is high (d) is a resistance knob
  5. 5.🧩 Which component makes things spin? (a) LED (b) resistor (c) motor (d) thermistor
  6. 6.🧩 Which part changes electrical energy into movement? (a) an LED (b) a fuse (c) a resistor (d) a motor
  7. 7.What does an LDR do? (a) limits the current (b) makes things spin (c) senses how bright it is (d) turns a fan or wheels
  8. 8.🧩 Which component senses how bright it is? (a) diode (b) thermistor (c) LDR (d) transistor
  9. 9.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a diode (c) a buzzer (d) a resistor
  10. 10.What does a capacitor do? (a) limits the current (b) beeps for an alarm (c) senses how hot it is (d) stores a little charge
  11. 11.🧩 Which component smooths a wobbly supply? (a) LED (b) resistor (c) motor (d) capacitor
  12. 12.🧩 Which component beeps for an alarm? (a) buzzer (b) motor (c) potentiometer (d) transistor
  13. 13.🧩 Which component blows if current is high? (a) buzzer (b) thermistor (c) fuse (d) transistor
  14. 14.True or false: a resistor has coloured bands. (a) True (b) False
  15. 15.True or false: a fuse is a resistance knob. (a) True (b) False
  16. 16.🧩 Which component has coloured bands? (a) LED (b) potentiometer (c) LDR (d) resistor
  17. 17.🧩 A capacitor in a circuit can … (a) make light (b) measure heat (c) spin a wheel (d) store charge briefly
  18. 18.True or false: a resistor is a resistance knob. (a) True (b) False
  19. 19.🧩 Which component boosts a small signal? (a) capacitor (b) transistor (c) LDR (d) thermistor
  20. 20.What does a motor do? (a) makes a beeping sound (b) smooths a wobbly supply (c) stores a little charge (d) makes things spin
  21. 21.🧩 Which component glows using little power? (a) diode (b) LED (c) motor (d) buzzer
  22. 22.What does a transistor do? (a) limits the current (b) boosts a small signal (c) senses how bright it is (d) has coloured bands
  23. 23.🧩 Which component stores a little charge? (a) fuse (b) capacitor (c) buzzer (d) transistor
  24. 24.What does a thermistor do? (a) senses how hot it is (b) smooths a wobbly supply (c) makes a beeping sound (d) limits the current
  25. 25.What does a capacitor do? (a) blows if current is high (b) senses how bright it is (c) makes a beeping sound (d) smooths a wobbly supply
  26. 26.🧩 Which component senses how hot it is? (a) fuse (b) thermistor (c) diode (d) buzzer
  27. 27.🧩 Which component turns a fan or wheels? (a) resistor (b) motor (c) LDR (d) fuse
  28. 28.True or false: a buzzer blows if current is high. (a) False (b) True
  29. 29.True or false: a buzzer is a resistance knob. (a) False (b) True
  30. 30.What does a resistor do? (a) is a resistance knob (b) has coloured bands (c) stores a little charge (d) smooths a wobbly supply
  31. 31.True or false: an LDR senses how bright it is. (a) False (b) True
  32. 32.True or false: a potentiometer stores a little charge. (a) False (b) True
  33. 33.True or false: a fuse boosts a small signal. (a) True (b) False
  34. 34.True or false: a diode lets current go one way. (a) False (b) True
  35. 35.What does a potentiometer do? (a) has coloured bands (b) is a resistance knob (c) senses how bright it is (d) stores a little charge
  36. 36.What does a motor do? (a) senses how hot it is (b) makes a beeping sound (c) turns a fan or wheels (d) senses how bright it is
  37. 37.🧩 Which component lets current go one way? (a) buzzer (b) motor (c) transistor (d) diode
  38. 38.True or false: a motor makes things spin. (a) True (b) False
  39. 39.True or false: a resistor glows using little power. (a) True (b) False
  40. 40.What does a diode do? (a) limits the current (b) has coloured bands (c) lets current go one way (d) turns a fan or wheels

Answer key

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

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