← Electronic components lesson New set →

Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 556 · 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 buzzer makes a beeping sound. (a) True (b) False
  2. 2.What does a thermistor do? (a) senses how hot it is (b) stores a little charge (c) lets current go one way (d) makes things spin
  3. 3.True or false: a buzzer blows if current is high. (a) True (b) False
  4. 4.🧩 Which component boosts a small signal? (a) resistor (b) capacitor (c) LDR (d) transistor
  5. 5.🧩 A capacitor in a circuit can … (a) measure heat (b) spin a wheel (c) store charge briefly (d) make light
  6. 6.What does a diode do? (a) lets current go one way (b) beeps for an alarm (c) senses how bright it is (d) limits the current
  7. 7.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a resistor (c) a buzzer (d) a diode
  8. 8.🧩 Which part changes electrical energy into movement? (a) a resistor (b) a motor (c) an LED (d) a fuse
  9. 9.What does a motor do? (a) stores a little charge (b) smooths a wobbly supply (c) turns a fan or wheels (d) makes a beeping sound
  10. 10.🧩 Which component is a resistance knob? (a) resistor (b) diode (c) potentiometer (d) thermistor
  11. 11.What does a resistor do? (a) stores a little charge (b) senses how hot it is (c) has coloured bands (d) beeps for an alarm
  12. 12.True or false: a buzzer beeps for an alarm. (a) False (b) True
  13. 13.True or false: a resistor senses how bright it is. (a) False (b) True
  14. 14.What does a resistor do? (a) stores a little charge (b) limits the current (c) lets current go one way (d) senses how bright it is
  15. 15.True or false: an LED stores a little charge. (a) False (b) True
  16. 16.True or false: a fuse blows if current is high. (a) False (b) True
  17. 17.True or false: an LED glows using little power. (a) False (b) True
  18. 18.True or false: a thermistor is a resistance knob. (a) True (b) False
  19. 19.🧩 Which component has coloured bands? (a) resistor (b) LDR (c) buzzer (d) diode
  20. 20.🧩 Which component limits the current? (a) motor (b) thermistor (c) LED (d) resistor
  21. 21.What does a fuse do? (a) stores a little charge (b) makes a beeping sound (c) senses how bright it is (d) blows if current is high
  22. 22.What does an LED do? (a) blows if current is high (b) glows using little power (c) boosts a small signal (d) beeps for an alarm
  23. 23.🧩 Which component smooths a wobbly supply? (a) diode (b) fuse (c) LDR (d) capacitor
  24. 24.What does a buzzer do? (a) makes a beeping sound (b) boosts a small signal (c) turns a fan or wheels (d) glows using little power
  25. 25.🧩 Which component senses how bright it is? (a) capacitor (b) resistor (c) LDR (d) LED
  26. 26.🧩 Which component stores a little charge? (a) buzzer (b) LDR (c) motor (d) capacitor
  27. 27.True or false: a transistor is a resistance knob. (a) False (b) True
  28. 28.True or false: a fuse boosts a small signal. (a) True (b) False
  29. 29.True or false: a motor limits the current. (a) False (b) True
  30. 30.True or false: a potentiometer boosts a small signal. (a) False (b) True
  31. 31.🧩 Which component senses how hot it is? (a) capacitor (b) thermistor (c) fuse (d) resistor
  32. 32.🧩 Which component glows using little power? (a) capacitor (b) potentiometer (c) buzzer (d) LED
  33. 33.What does a motor do? (a) smooths a wobbly supply (b) boosts a small signal (c) makes things spin (d) limits the current
  34. 34.🧩 Which component makes a beeping sound? (a) fuse (b) thermistor (c) transistor (d) buzzer
  35. 35.True or false: a diode makes things spin. (a) True (b) False
  36. 36.True or false: a buzzer limits the current. (a) True (b) False
  37. 37.True or false: a thermistor makes things spin. (a) True (b) False
  38. 38.True or false: a diode turns a fan or wheels. (a) False (b) True
  39. 39.What does a buzzer do? (a) senses how bright it is (b) beeps for an alarm (c) smooths a wobbly supply (d) is a resistance knob
  40. 40.True or false: an LDR senses how bright it is. (a) False (b) True

Answer key

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

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