← Electronic components lesson New set →

Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 406 · 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 transistor limits the current. (a) False (b) True
  2. 2.What does a motor do? (a) has coloured bands (b) turns a fan or wheels (c) smooths a wobbly supply (d) boosts a small signal
  3. 3.True or false: a transistor stores a little charge. (a) True (b) False
  4. 4.🧩 Which component glows using little power? (a) LED (b) resistor (c) capacitor (d) LDR
  5. 5.🧩 Which component lets current go one way? (a) motor (b) diode (c) thermistor (d) buzzer
  6. 6.True or false: a fuse beeps for an alarm. (a) True (b) False
  7. 7.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a diode (c) a resistor (d) a buzzer
  8. 8.True or false: a diode lets current go one way. (a) True (b) False
  9. 9.🧩 A capacitor in a circuit can … (a) make light (b) measure heat (c) store charge briefly (d) spin a wheel
  10. 10.True or false: a resistor has coloured bands. (a) True (b) False
  11. 11.True or false: a motor senses how hot it is. (a) False (b) True
  12. 12.True or false: an LED glows using little power. (a) True (b) False
  13. 13.True or false: a resistor senses how hot it is. (a) True (b) False
  14. 14.🧩 Which component makes a beeping sound? (a) buzzer (b) resistor (c) potentiometer (d) thermistor
  15. 15.What does a thermistor do? (a) smooths a wobbly supply (b) limits the current (c) senses how hot it is (d) makes things spin
  16. 16.🧩 Which component has coloured bands? (a) motor (b) LDR (c) resistor (d) thermistor
  17. 17.🧩 Which component blows if current is high? (a) thermistor (b) diode (c) fuse (d) potentiometer
  18. 18.🧩 Which part changes electrical energy into movement? (a) a resistor (b) a fuse (c) an LED (d) a motor
  19. 19.True or false: a thermistor smooths a wobbly supply. (a) False (b) True
  20. 20.True or false: a transistor lets current go one way. (a) False (b) True
  21. 21.True or false: a motor turns a fan or wheels. (a) True (b) False
  22. 22.True or false: a thermistor blows if current is high. (a) True (b) False
  23. 23.True or false: a resistor lets current go one way. (a) True (b) False
  24. 24.What does a buzzer do? (a) glows using little power (b) has coloured bands (c) makes a beeping sound (d) makes things spin
  25. 25.🧩 Which component stores a little charge? (a) motor (b) potentiometer (c) thermistor (d) capacitor
  26. 26.🧩 Which component turns a fan or wheels? (a) LED (b) buzzer (c) motor (d) transistor
  27. 27.What does a capacitor do? (a) turns a fan or wheels (b) makes things spin (c) smooths a wobbly supply (d) limits the current
  28. 28.True or false: a transistor senses how hot it is. (a) False (b) True
  29. 29.What does a resistor do? (a) stores a little charge (b) smooths a wobbly supply (c) senses how bright it is (d) limits the current
  30. 30.What does a fuse do? (a) beeps for an alarm (b) glows using little power (c) blows if current is high (d) senses how hot it is
  31. 31.What does an LDR do? (a) senses how bright it is (b) turns a fan or wheels (c) lets current go one way (d) senses how hot it is
  32. 32.True or false: a motor glows using little power. (a) False (b) True
  33. 33.True or false: a fuse blows if current is high. (a) False (b) True
  34. 34.True or false: a resistor makes a beeping sound. (a) False (b) True
  35. 35.🧩 Which component smooths a wobbly supply? (a) resistor (b) thermistor (c) fuse (d) capacitor
  36. 36.True or false: an LED beeps for an alarm. (a) True (b) False
  37. 37.What does a transistor do? (a) glows using little power (b) stores a little charge (c) has coloured bands (d) boosts a small signal
  38. 38.🧩 Which component makes things spin? (a) fuse (b) diode (c) potentiometer (d) motor
  39. 39.True or false: a motor lets current go one way. (a) True (b) False
  40. 40.🧩 Which component beeps for an alarm? (a) diode (b) buzzer (c) thermistor (d) resistor

Answer key

  1. False
  2. turns a fan or wheels
  3. False
  4. LED
  5. diode
  6. False
  7. a buzzer
  8. True
  9. store charge briefly
  10. True
  11. False
  12. True
  13. False
  14. buzzer
  15. senses how hot it is
  16. resistor
  17. fuse
  18. a motor
  19. False
  20. False
  21. True
  22. False
  23. False
  24. makes a beeping sound
  25. capacitor
  26. motor
  27. smooths a wobbly supply
  28. False
  29. limits the current
  30. blows if current is high
  31. senses how bright it is
  32. False
  33. True
  34. False
  35. capacitor
  36. False
  37. boosts a small signal
  38. motor
  39. False
  40. buzzer

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