← Electronic components lesson New set →

Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 393 · 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 part changes electrical energy into movement? (a) an LED (b) a resistor (c) a fuse (d) a motor
  2. 2.True or false: a transistor boosts a small signal. (a) False (b) True
  3. 3.What does an LDR do? (a) senses how bright it is (b) stores a little charge (c) makes a beeping sound (d) limits the current
  4. 4.🧩 Which component limits the current? (a) LED (b) resistor (c) buzzer (d) fuse
  5. 5.🧩 Which component makes things spin? (a) transistor (b) capacitor (c) LDR (d) motor
  6. 6.🧩 Which component beeps for an alarm? (a) capacitor (b) potentiometer (c) buzzer (d) resistor
  7. 7.🧩 A capacitor in a circuit can … (a) make light (b) spin a wheel (c) store charge briefly (d) measure heat
  8. 8.What does a capacitor do? (a) makes things spin (b) glows using little power (c) smooths a wobbly supply (d) limits the current
  9. 9.What does a resistor do? (a) stores a little charge (b) blows if current is high (c) limits the current (d) beeps for an alarm
  10. 10.What does a buzzer do? (a) blows if current is high (b) limits the current (c) boosts a small signal (d) beeps for an alarm
  11. 11.True or false: a buzzer beeps for an alarm. (a) False (b) True
  12. 12.🧩 Which component makes a beeping sound? (a) diode (b) capacitor (c) buzzer (d) motor
  13. 13.True or false: a thermistor makes a beeping sound. (a) True (b) False
  14. 14.True or false: a motor makes things spin. (a) True (b) False
  15. 15.True or false: an LED beeps for an alarm. (a) False (b) True
  16. 16.What does an LED do? (a) is a resistance knob (b) stores a little charge (c) limits the current (d) glows using little power
  17. 17.🧩 Which component has coloured bands? (a) diode (b) resistor (c) buzzer (d) potentiometer
  18. 18.What does a potentiometer do? (a) lets current go one way (b) is a resistance knob (c) smooths a wobbly supply (d) stores a little charge
  19. 19.What does a motor do? (a) blows if current is high (b) stores a little charge (c) boosts a small signal (d) turns a fan or wheels
  20. 20.True or false: an LDR blows if current is high. (a) True (b) False
  21. 21.True or false: an LDR senses how bright it is. (a) False (b) True
  22. 22.🧩 Which component smooths a wobbly supply? (a) capacitor (b) thermistor (c) buzzer (d) motor
  23. 23.True or false: a motor lets current go one way. (a) False (b) True
  24. 24.True or false: an LDR boosts a small signal. (a) False (b) True
  25. 25.🧩 Which part changes electrical energy into sound? (a) a buzzer (b) a resistor (c) a capacitor (d) a diode
  26. 26.What does a diode do? (a) has coloured bands (b) boosts a small signal (c) lets current go one way (d) blows if current is high
  27. 27.🧩 Which component boosts a small signal? (a) transistor (b) LDR (c) thermistor (d) potentiometer
  28. 28.True or false: a potentiometer blows if current is high. (a) True (b) False
  29. 29.True or false: a resistor limits the current. (a) True (b) False
  30. 30.True or false: an LDR is a resistance knob. (a) False (b) True
  31. 31.True or false: a thermistor beeps for an alarm. (a) True (b) False
  32. 32.🧩 Which component senses how hot it is? (a) resistor (b) thermistor (c) diode (d) motor
  33. 33.True or false: a fuse beeps for an alarm. (a) False (b) True
  34. 34.What does a fuse do? (a) glows using little power (b) blows if current is high (c) lets current go one way (d) senses how hot it is
  35. 35.True or false: a thermistor smooths a wobbly supply. (a) False (b) True
  36. 36.True or false: a diode limits the current. (a) False (b) True
  37. 37.🧩 Which component lets current go one way? (a) resistor (b) diode (c) motor (d) fuse
  38. 38.True or false: an LED smooths a wobbly supply. (a) False (b) True
  39. 39.What does a resistor do? (a) stores a little charge (b) has coloured bands (c) makes a beeping sound (d) turns a fan or wheels
  40. 40.True or false: a motor makes a beeping sound. (a) True (b) False

Answer key

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

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