← Electronic components lesson New set →

Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 70 · 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.🧩 A capacitor in a circuit can … (a) make light (b) store charge briefly (c) spin a wheel (d) measure heat
  2. 2.🧩 Which component stores a little charge? (a) transistor (b) motor (c) capacitor (d) LED
  3. 3.True or false: a potentiometer is a resistance knob. (a) True (b) False
  4. 4.What does a capacitor do? (a) blows if current is high (b) glows using little power (c) stores a little charge (d) senses how hot it is
  5. 5.What does a fuse do? (a) limits the current (b) makes a beeping sound (c) blows if current is high (d) smooths a wobbly supply
  6. 6.🧩 Which component lets current go one way? (a) motor (b) capacitor (c) diode (d) LDR
  7. 7.True or false: an LDR is a resistance knob. (a) False (b) True
  8. 8.What does a resistor do? (a) blows if current is high (b) has coloured bands (c) turns a fan or wheels (d) smooths a wobbly supply
  9. 9.True or false: a motor makes things spin. (a) True (b) False
  10. 10.🧩 Which part changes electrical energy into movement? (a) an LED (b) a resistor (c) a motor (d) a fuse
  11. 11.🧩 Which component is a resistance knob? (a) resistor (b) LED (c) potentiometer (d) fuse
  12. 12.🧩 Which component boosts a small signal? (a) potentiometer (b) fuse (c) capacitor (d) transistor
  13. 13.🧩 Which component limits the current? (a) resistor (b) thermistor (c) buzzer (d) fuse
  14. 14.True or false: a fuse beeps for an alarm. (a) False (b) True
  15. 15.True or false: a diode lets current go one way. (a) False (b) True
  16. 16.🧩 Which component glows using little power? (a) thermistor (b) buzzer (c) LED (d) fuse
  17. 17.True or false: a capacitor stores a little charge. (a) True (b) False
  18. 18.True or false: a motor has coloured bands. (a) False (b) True
  19. 19.🧩 Which component smooths a wobbly supply? (a) capacitor (b) resistor (c) potentiometer (d) buzzer
  20. 20.True or false: a motor limits the current. (a) True (b) False
  21. 21.🧩 Which component makes things spin? (a) capacitor (b) resistor (c) diode (d) motor
  22. 22.True or false: a thermistor smooths a wobbly supply. (a) True (b) False
  23. 23.What does a transistor do? (a) turns a fan or wheels (b) boosts a small signal (c) limits the current (d) lets current go one way
  24. 24.What does a motor do? (a) lets current go one way (b) makes things spin (c) senses how bright it is (d) senses how hot it is
  25. 25.🧩 Which part changes electrical energy into sound? (a) a buzzer (b) a diode (c) a resistor (d) a capacitor
  26. 26.🧩 Which component makes a beeping sound? (a) motor (b) resistor (c) LED (d) buzzer
  27. 27.What does a resistor do? (a) beeps for an alarm (b) is a resistance knob (c) limits the current (d) smooths a wobbly supply
  28. 28.True or false: a buzzer makes a beeping sound. (a) True (b) False
  29. 29.True or false: a buzzer beeps for an alarm. (a) False (b) True
  30. 30.What does a capacitor do? (a) makes a beeping sound (b) smooths a wobbly supply (c) blows if current is high (d) glows using little power
  31. 31.True or false: a buzzer lets current go one way. (a) False (b) True
  32. 32.🧩 Which component turns a fan or wheels? (a) diode (b) resistor (c) transistor (d) motor
  33. 33.What does an LED do? (a) limits the current (b) glows using little power (c) senses how bright it is (d) makes a beeping sound
  34. 34.🧩 Which component senses how hot it is? (a) diode (b) fuse (c) thermistor (d) potentiometer
  35. 35.True or false: a motor glows using little power. (a) True (b) False
  36. 36.True or false: a resistor senses how bright it is. (a) False (b) True
  37. 37.True or false: a resistor stores a little charge. (a) False (b) True
  38. 38.True or false: a capacitor boosts a small signal. (a) True (b) False
  39. 39.True or false: a resistor limits the current. (a) False (b) True
  40. 40.What does a diode do? (a) boosts a small signal (b) makes things spin (c) stores a little charge (d) lets current go one way

Answer key

  1. store charge briefly
  2. capacitor
  3. True
  4. stores a little charge
  5. blows if current is high
  6. diode
  7. False
  8. has coloured bands
  9. True
  10. a motor
  11. potentiometer
  12. transistor
  13. resistor
  14. False
  15. True
  16. LED
  17. True
  18. False
  19. capacitor
  20. False
  21. motor
  22. False
  23. boosts a small signal
  24. makes things spin
  25. a buzzer
  26. buzzer
  27. limits the current
  28. True
  29. True
  30. smooths a wobbly supply
  31. False
  32. motor
  33. glows using little power
  34. thermistor
  35. False
  36. False
  37. False
  38. False
  39. True
  40. lets current go one way

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