← Electronic components lesson New set →

Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 682 · 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 lets current go one way? (a) fuse (b) diode (c) potentiometer (d) motor
  2. 2.🧩 Which component limits the current? (a) transistor (b) diode (c) thermistor (d) resistor
  3. 3.True or false: a motor makes things spin. (a) False (b) True
  4. 4.What does a diode do? (a) is a resistance knob (b) lets current go one way (c) boosts a small signal (d) blows if current is high
  5. 5.🧩 Which component senses how bright it is? (a) LED (b) resistor (c) LDR (d) diode
  6. 6.🧩 Which part changes electrical energy into movement? (a) a fuse (b) a motor (c) a resistor (d) an LED
  7. 7.🧩 A capacitor in a circuit can … (a) make light (b) measure heat (c) store charge briefly (d) spin a wheel
  8. 8.What does a thermistor do? (a) glows using little power (b) turns a fan or wheels (c) makes things spin (d) senses how hot it is
  9. 9.True or false: a thermistor makes a beeping sound. (a) True (b) False
  10. 10.True or false: a motor beeps for an alarm. (a) False (b) True
  11. 11.🧩 Which component makes things spin? (a) transistor (b) fuse (c) motor (d) buzzer
  12. 12.🧩 Which component is a resistance knob? (a) thermistor (b) potentiometer (c) LDR (d) capacitor
  13. 13.🧩 Which component makes a beeping sound? (a) resistor (b) buzzer (c) LDR (d) thermistor
  14. 14.What does a motor do? (a) limits the current (b) smooths a wobbly supply (c) boosts a small signal (d) turns a fan or wheels
  15. 15.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a diode (c) a capacitor (d) a buzzer
  16. 16.🧩 Which component senses how hot it is? (a) diode (b) transistor (c) thermistor (d) resistor
  17. 17.🧩 Which component has coloured bands? (a) motor (b) resistor (c) potentiometer (d) buzzer
  18. 18.What does a resistor do? (a) boosts a small signal (b) blows if current is high (c) has coloured bands (d) smooths a wobbly supply
  19. 19.What does an LED do? (a) turns a fan or wheels (b) boosts a small signal (c) lets current go one way (d) glows using little power
  20. 20.True or false: an LED turns a fan or wheels. (a) False (b) True
  21. 21.True or false: a fuse blows if current is high. (a) True (b) False
  22. 22.What does a capacitor do? (a) makes things spin (b) blows if current is high (c) glows using little power (d) stores a little charge
  23. 23.🧩 Which component smooths a wobbly supply? (a) fuse (b) transistor (c) capacitor (d) thermistor
  24. 24.True or false: a potentiometer senses how bright it is. (a) False (b) True
  25. 25.🧩 Which component boosts a small signal? (a) resistor (b) LED (c) thermistor (d) transistor
  26. 26.🧩 Which component stores a little charge? (a) capacitor (b) resistor (c) potentiometer (d) buzzer
  27. 27.What does a resistor do? (a) stores a little charge (b) glows using little power (c) senses how hot it is (d) limits the current
  28. 28.True or false: a resistor senses how bright it is. (a) True (b) False
  29. 29.True or false: an LDR senses how bright it is. (a) False (b) True
  30. 30.True or false: a diode turns a fan or wheels. (a) False (b) True
  31. 31.What does a motor do? (a) senses how hot it is (b) makes things spin (c) blows if current is high (d) has coloured bands
  32. 32.True or false: a diode lets current go one way. (a) True (b) False
  33. 33.True or false: a buzzer has coloured bands. (a) False (b) True
  34. 34.True or false: a fuse turns a fan or wheels. (a) True (b) False
  35. 35.True or false: a capacitor stores a little charge. (a) False (b) True
  36. 36.True or false: a capacitor turns a fan or wheels. (a) False (b) True
  37. 37.True or false: a thermistor turns a fan or wheels. (a) True (b) False
  38. 38.True or false: a transistor boosts a small signal. (a) False (b) True
  39. 39.🧩 Which component beeps for an alarm? (a) transistor (b) capacitor (c) buzzer (d) diode
  40. 40.What does an LDR do? (a) turns a fan or wheels (b) senses how bright it is (c) makes a beeping sound (d) stores a little charge

Answer key

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

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