← Electronic components lesson New set →

Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 130 · 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.What does a transistor do? (a) blows if current is high (b) is a resistance knob (c) makes a beeping sound (d) boosts a small signal
  2. 2.What does a fuse do? (a) blows if current is high (b) makes a beeping sound (c) smooths a wobbly supply (d) beeps for an alarm
  3. 3.🧩 Which component has coloured bands? (a) resistor (b) buzzer (c) diode (d) capacitor
  4. 4.🧩 Which part changes electrical energy into movement? (a) a motor (b) a fuse (c) an LED (d) a resistor
  5. 5.True or false: an LED senses how hot it is. (a) True (b) False
  6. 6.True or false: an LED glows using little power. (a) True (b) False
  7. 7.True or false: a resistor has coloured bands. (a) False (b) True
  8. 8.🧩 A capacitor in a circuit can … (a) store charge briefly (b) make light (c) measure heat (d) spin a wheel
  9. 9.True or false: a buzzer senses how bright it is. (a) True (b) False
  10. 10.True or false: a potentiometer makes a beeping sound. (a) False (b) True
  11. 11.True or false: a diode lets current go one way. (a) True (b) False
  12. 12.What does a potentiometer do? (a) is a resistance knob (b) boosts a small signal (c) has coloured bands (d) stores a little charge
  13. 13.True or false: a buzzer beeps for an alarm. (a) False (b) True
  14. 14.What does a resistor do? (a) beeps for an alarm (b) senses how hot it is (c) makes things spin (d) has coloured bands
  15. 15.What does an LED do? (a) glows using little power (b) turns a fan or wheels (c) has coloured bands (d) smooths a wobbly supply
  16. 16.True or false: a fuse limits the current. (a) False (b) True
  17. 17.🧩 Which component blows if current is high? (a) resistor (b) transistor (c) buzzer (d) fuse
  18. 18.True or false: a transistor boosts a small signal. (a) False (b) True
  19. 19.🧩 Which component turns a fan or wheels? (a) resistor (b) potentiometer (c) diode (d) motor
  20. 20.🧩 Which component stores a little charge? (a) buzzer (b) thermistor (c) transistor (d) capacitor
  21. 21.What does a capacitor do? (a) smooths a wobbly supply (b) limits the current (c) beeps for an alarm (d) makes things spin
  22. 22.True or false: a capacitor makes things spin. (a) True (b) False
  23. 23.True or false: a diode senses how bright it is. (a) True (b) False
  24. 24.🧩 Which component glows using little power? (a) resistor (b) LDR (c) capacitor (d) LED
  25. 25.True or false: a buzzer boosts a small signal. (a) True (b) False
  26. 26.True or false: an LED makes things spin. (a) False (b) True
  27. 27.True or false: a transistor blows if current is high. (a) True (b) False
  28. 28.What does a buzzer do? (a) makes things spin (b) stores a little charge (c) has coloured bands (d) makes a beeping sound
  29. 29.🧩 Which component limits the current? (a) fuse (b) motor (c) capacitor (d) resistor
  30. 30.What does a diode do? (a) glows using little power (b) smooths a wobbly supply (c) lets current go one way (d) boosts a small signal
  31. 31.🧩 Which component lets current go one way? (a) resistor (b) capacitor (c) diode (d) buzzer
  32. 32.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a diode (c) a buzzer (d) a capacitor
  33. 33.What does a motor do? (a) blows if current is high (b) lets current go one way (c) smooths a wobbly supply (d) makes things spin
  34. 34.🧩 Which component makes a beeping sound? (a) resistor (b) fuse (c) buzzer (d) motor
  35. 35.True or false: a capacitor boosts a small signal. (a) True (b) False
  36. 36.True or false: a motor turns a fan or wheels. (a) False (b) True
  37. 37.🧩 Which component senses how hot it is? (a) thermistor (b) diode (c) buzzer (d) transistor
  38. 38.🧩 Which component is a resistance knob? (a) transistor (b) potentiometer (c) LED (d) resistor
  39. 39.🧩 Which component senses how bright it is? (a) LED (b) LDR (c) buzzer (d) potentiometer
  40. 40.What does a thermistor do? (a) senses how hot it is (b) stores a little charge (c) limits the current (d) lets current go one way

Answer key

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

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