← Electronic components lesson New set →

Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 115 · 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 motor do? (a) turns a fan or wheels (b) beeps for an alarm (c) has coloured bands (d) glows using little power
  2. 2.What does a diode do? (a) lets current go one way (b) glows using little power (c) limits the current (d) makes a beeping sound
  3. 3.🧩 Which part changes electrical energy into movement? (a) a motor (b) a fuse (c) an LED (d) a resistor
  4. 4.True or false: a fuse blows if current is high. (a) True (b) False
  5. 5.🧩 A capacitor in a circuit can … (a) measure heat (b) make light (c) spin a wheel (d) store charge briefly
  6. 6.🧩 Which component stores a little charge? (a) fuse (b) capacitor (c) LDR (d) thermistor
  7. 7.🧩 Which component makes a beeping sound? (a) capacitor (b) buzzer (c) LED (d) fuse
  8. 8.What does a transistor do? (a) blows if current is high (b) stores a little charge (c) has coloured bands (d) boosts a small signal
  9. 9.What does a resistor do? (a) makes a beeping sound (b) has coloured bands (c) glows using little power (d) stores a little charge
  10. 10.🧩 Which component boosts a small signal? (a) fuse (b) transistor (c) diode (d) potentiometer
  11. 11.🧩 Which component limits the current? (a) fuse (b) LDR (c) potentiometer (d) resistor
  12. 12.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a resistor (c) a buzzer (d) a diode
  13. 13.🧩 Which component smooths a wobbly supply? (a) transistor (b) thermistor (c) potentiometer (d) capacitor
  14. 14.True or false: a motor senses how bright it is. (a) True (b) False
  15. 15.True or false: a buzzer smooths a wobbly supply. (a) False (b) True
  16. 16.What does an LED do? (a) is a resistance knob (b) stores a little charge (c) senses how bright it is (d) glows using little power
  17. 17.🧩 Which component is a resistance knob? (a) LED (b) transistor (c) potentiometer (d) capacitor
  18. 18.True or false: a resistor limits the current. (a) True (b) False
  19. 19.True or false: a buzzer stores a little charge. (a) True (b) False
  20. 20.True or false: a capacitor stores a little charge. (a) False (b) True
  21. 21.True or false: a resistor glows using little power. (a) False (b) True
  22. 22.What does a buzzer do? (a) makes things spin (b) blows if current is high (c) turns a fan or wheels (d) beeps for an alarm
  23. 23.True or false: a thermistor senses how hot it is. (a) False (b) True
  24. 24.True or false: an LDR blows if current is high. (a) False (b) True
  25. 25.What does a resistor do? (a) smooths a wobbly supply (b) limits the current (c) senses how hot it is (d) stores a little charge
  26. 26.What does a potentiometer do? (a) turns a fan or wheels (b) boosts a small signal (c) senses how bright it is (d) is a resistance knob
  27. 27.🧩 Which component makes things spin? (a) motor (b) transistor (c) fuse (d) thermistor
  28. 28.🧩 Which component blows if current is high? (a) fuse (b) capacitor (c) potentiometer (d) LDR
  29. 29.True or false: a capacitor is a resistance knob. (a) False (b) True
  30. 30.True or false: a fuse has coloured bands. (a) True (b) False
  31. 31.True or false: an LDR smooths a wobbly supply. (a) True (b) False
  32. 32.True or false: a motor glows using little power. (a) False (b) True
  33. 33.True or false: an LED glows using little power. (a) False (b) True
  34. 34.True or false: a resistor boosts a small signal. (a) False (b) True
  35. 35.What does a capacitor do? (a) limits the current (b) stores a little charge (c) senses how hot it is (d) has coloured bands
  36. 36.True or false: a motor turns a fan or wheels. (a) False (b) True
  37. 37.True or false: a motor makes things spin. (a) True (b) False
  38. 38.🧩 Which component has coloured bands? (a) potentiometer (b) thermistor (c) resistor (d) motor
  39. 39.True or false: a motor has coloured bands. (a) True (b) False
  40. 40.True or false: a buzzer makes things spin. (a) False (b) True

Answer key

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

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