← Electronic components lesson New set →

Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 96 · 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 turns a fan or wheels? (a) thermistor (b) buzzer (c) potentiometer (d) motor
  2. 2.What does a buzzer do? (a) beeps for an alarm (b) is a resistance knob (c) makes things spin (d) lets current go one way
  3. 3.🧩 Which component is a resistance knob? (a) resistor (b) potentiometer (c) buzzer (d) motor
  4. 4.🧩 Which part changes electrical energy into movement? (a) a resistor (b) a motor (c) an LED (d) a fuse
  5. 5.What does a capacitor do? (a) makes a beeping sound (b) is a resistance knob (c) makes things spin (d) stores a little charge
  6. 6.True or false: a buzzer makes things spin. (a) True (b) False
  7. 7.🧩 Which component senses how bright it is? (a) LDR (b) potentiometer (c) motor (d) capacitor
  8. 8.True or false: an LED turns a fan or wheels. (a) True (b) False
  9. 9.🧩 Which component stores a little charge? (a) fuse (b) transistor (c) capacitor (d) LED
  10. 10.True or false: an LED smooths a wobbly supply. (a) True (b) False
  11. 11.🧩 Which component limits the current? (a) buzzer (b) resistor (c) diode (d) LED
  12. 12.What does a motor do? (a) limits the current (b) boosts a small signal (c) turns a fan or wheels (d) stores a little charge
  13. 13.🧩 Which component glows using little power? (a) resistor (b) buzzer (c) LED (d) capacitor
  14. 14.What does a potentiometer do? (a) stores a little charge (b) makes a beeping sound (c) limits the current (d) is a resistance knob
  15. 15.What does a thermistor do? (a) beeps for an alarm (b) senses how bright it is (c) senses how hot it is (d) glows using little power
  16. 16.What does an LED do? (a) makes a beeping sound (b) beeps for an alarm (c) has coloured bands (d) glows using little power
  17. 17.What does a motor do? (a) glows using little power (b) limits the current (c) makes things spin (d) blows if current is high
  18. 18.🧩 Which component smooths a wobbly supply? (a) capacitor (b) diode (c) transistor (d) LED
  19. 19.🧩 A capacitor in a circuit can … (a) measure heat (b) spin a wheel (c) make light (d) store charge briefly
  20. 20.🧩 Which part changes electrical energy into sound? (a) a diode (b) a resistor (c) a capacitor (d) a buzzer
  21. 21.What does a transistor do? (a) beeps for an alarm (b) boosts a small signal (c) has coloured bands (d) makes a beeping sound
  22. 22.True or false: a thermistor has coloured bands. (a) True (b) False
  23. 23.🧩 Which component senses how hot it is? (a) thermistor (b) resistor (c) LDR (d) motor
  24. 24.🧩 Which component lets current go one way? (a) buzzer (b) fuse (c) potentiometer (d) diode
  25. 25.True or false: a diode smooths a wobbly supply. (a) False (b) True
  26. 26.🧩 Which component makes things spin? (a) capacitor (b) motor (c) diode (d) resistor
  27. 27.What does a buzzer do? (a) limits the current (b) senses how hot it is (c) is a resistance knob (d) makes a beeping sound
  28. 28.True or false: a diode makes things spin. (a) False (b) True
  29. 29.True or false: a motor makes things spin. (a) True (b) False
  30. 30.What does a resistor do? (a) turns a fan or wheels (b) blows if current is high (c) glows using little power (d) has coloured bands
  31. 31.True or false: a buzzer blows if current is high. (a) True (b) False
  32. 32.True or false: a fuse blows if current is high. (a) True (b) False
  33. 33.True or false: a thermistor senses how hot it is. (a) True (b) False
  34. 34.True or false: a transistor smooths a wobbly supply. (a) False (b) True
  35. 35.True or false: a motor turns a fan or wheels. (a) False (b) True
  36. 36.What does a diode do? (a) lets current go one way (b) limits the current (c) blows if current is high (d) makes a beeping sound
  37. 37.True or false: a transistor turns a fan or wheels. (a) True (b) False
  38. 38.True or false: a resistor has coloured bands. (a) True (b) False
  39. 39.🧩 Which component makes a beeping sound? (a) transistor (b) fuse (c) buzzer (d) LED
  40. 40.True or false: a motor smooths a wobbly supply. (a) False (b) True

Answer key

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

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