← Electronic components lesson New set →

Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 380 · 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 is a resistance knob? (a) LED (b) buzzer (c) diode (d) potentiometer
  2. 2.🧩 Which part changes electrical energy into movement? (a) a resistor (b) a fuse (c) a motor (d) an LED
  3. 3.True or false: a resistor has coloured bands. (a) False (b) True
  4. 4.🧩 Which component senses how bright it is? (a) LDR (b) potentiometer (c) diode (d) buzzer
  5. 5.🧩 Which component limits the current? (a) potentiometer (b) LDR (c) resistor (d) LED
  6. 6.True or false: a motor turns a fan or wheels. (a) False (b) True
  7. 7.True or false: a diode stores a little charge. (a) False (b) True
  8. 8.What does a diode do? (a) turns a fan or wheels (b) limits the current (c) lets current go one way (d) has coloured bands
  9. 9.🧩 Which component turns a fan or wheels? (a) LDR (b) fuse (c) LED (d) motor
  10. 10.🧩 A capacitor in a circuit can … (a) spin a wheel (b) store charge briefly (c) measure heat (d) make light
  11. 11.What does a fuse do? (a) senses how bright it is (b) senses how hot it is (c) beeps for an alarm (d) blows if current is high
  12. 12.True or false: a fuse blows if current is high. (a) True (b) False
  13. 13.🧩 Which part changes electrical energy into sound? (a) a buzzer (b) a capacitor (c) a diode (d) a resistor
  14. 14.What does a resistor do? (a) limits the current (b) makes a beeping sound (c) senses how bright it is (d) stores a little charge
  15. 15.What does a motor do? (a) blows if current is high (b) has coloured bands (c) makes things spin (d) smooths a wobbly supply
  16. 16.True or false: a resistor smooths a wobbly supply. (a) False (b) True
  17. 17.True or false: a motor has coloured bands. (a) False (b) True
  18. 18.True or false: a capacitor stores a little charge. (a) True (b) False
  19. 19.What does an LED do? (a) glows using little power (b) turns a fan or wheels (c) senses how bright it is (d) makes a beeping sound
  20. 20.What does a capacitor do? (a) stores a little charge (b) limits the current (c) turns a fan or wheels (d) beeps for an alarm
  21. 21.🧩 Which component senses how hot it is? (a) buzzer (b) potentiometer (c) LDR (d) thermistor
  22. 22.What does an LDR do? (a) makes a beeping sound (b) makes things spin (c) senses how bright it is (d) limits the current
  23. 23.What does a buzzer do? (a) beeps for an alarm (b) blows if current is high (c) limits the current (d) is a resistance knob
  24. 24.True or false: an LDR senses how bright it is. (a) False (b) True
  25. 25.🧩 Which component has coloured bands? (a) LED (b) capacitor (c) diode (d) resistor
  26. 26.🧩 Which component makes a beeping sound? (a) LDR (b) transistor (c) diode (d) buzzer
  27. 27.🧩 Which component beeps for an alarm? (a) motor (b) buzzer (c) LED (d) transistor
  28. 28.🧩 Which component stores a little charge? (a) capacitor (b) diode (c) buzzer (d) LDR
  29. 29.What does a transistor do? (a) is a resistance knob (b) senses how hot it is (c) boosts a small signal (d) makes things spin
  30. 30.True or false: a buzzer makes things spin. (a) False (b) True
  31. 31.True or false: a thermistor boosts a small signal. (a) True (b) False
  32. 32.True or false: a potentiometer turns a fan or wheels. (a) False (b) True
  33. 33.True or false: a resistor beeps for an alarm. (a) True (b) False
  34. 34.True or false: a resistor limits the current. (a) False (b) True
  35. 35.True or false: a transistor boosts a small signal. (a) True (b) False
  36. 36.🧩 Which component blows if current is high? (a) potentiometer (b) motor (c) fuse (d) capacitor
  37. 37.🧩 Which component makes things spin? (a) motor (b) resistor (c) LDR (d) diode
  38. 38.True or false: a motor makes things spin. (a) True (b) False
  39. 39.True or false: an LED boosts a small signal. (a) False (b) True
  40. 40.What does a buzzer do? (a) glows using little power (b) makes things spin (c) makes a beeping sound (d) turns a fan or wheels

Answer key

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

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