← Electronic components lesson New set →

Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 613 · 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 an LDR do? (a) lets current go one way (b) limits the current (c) glows using little power (d) senses how bright it is
  2. 2.🧩 Which component limits the current? (a) fuse (b) potentiometer (c) resistor (d) LED
  3. 3.True or false: a potentiometer senses how hot it is. (a) True (b) False
  4. 4.What does a resistor do? (a) blows if current is high (b) limits the current (c) is a resistance knob (d) makes a beeping sound
  5. 5.🧩 A capacitor in a circuit can … (a) spin a wheel (b) store charge briefly (c) make light (d) measure heat
  6. 6.🧩 Which component lets current go one way? (a) diode (b) resistor (c) LDR (d) thermistor
  7. 7.True or false: a buzzer senses how bright it is. (a) False (b) True
  8. 8.True or false: an LED glows using little power. (a) False (b) True
  9. 9.What does a potentiometer do? (a) glows using little power (b) has coloured bands (c) beeps for an alarm (d) is a resistance knob
  10. 10.What does a capacitor do? (a) smooths a wobbly supply (b) makes a beeping sound (c) has coloured bands (d) boosts a small signal
  11. 11.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a capacitor (c) a diode (d) a buzzer
  12. 12.🧩 Which component boosts a small signal? (a) transistor (b) fuse (c) resistor (d) diode
  13. 13.True or false: a fuse turns a fan or wheels. (a) True (b) False
  14. 14.🧩 Which component turns a fan or wheels? (a) LDR (b) motor (c) buzzer (d) potentiometer
  15. 15.🧩 Which component makes things spin? (a) LED (b) resistor (c) thermistor (d) motor
  16. 16.What does a transistor do? (a) boosts a small signal (b) stores a little charge (c) blows if current is high (d) turns a fan or wheels
  17. 17.🧩 Which component senses how bright it is? (a) fuse (b) resistor (c) LDR (d) capacitor
  18. 18.True or false: a capacitor stores a little charge. (a) True (b) False
  19. 19.True or false: a fuse makes a beeping sound. (a) False (b) True
  20. 20.What does an LED do? (a) turns a fan or wheels (b) glows using little power (c) beeps for an alarm (d) boosts a small signal
  21. 21.True or false: a fuse stores a little charge. (a) False (b) True
  22. 22.What does a buzzer do? (a) is a resistance knob (b) glows using little power (c) boosts a small signal (d) makes a beeping sound
  23. 23.🧩 Which component is a resistance knob? (a) capacitor (b) motor (c) potentiometer (d) fuse
  24. 24.What does a capacitor do? (a) stores a little charge (b) limits the current (c) is a resistance knob (d) lets current go one way
  25. 25.True or false: an LDR smooths a wobbly supply. (a) True (b) False
  26. 26.True or false: a buzzer beeps for an alarm. (a) True (b) False
  27. 27.True or false: a resistor has coloured bands. (a) False (b) True
  28. 28.True or false: a fuse beeps for an alarm. (a) True (b) False
  29. 29.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
  30. 30.What does a thermistor do? (a) turns a fan or wheels (b) lets current go one way (c) senses how hot it is (d) makes a beeping sound
  31. 31.True or false: a motor glows using little power. (a) False (b) True
  32. 32.🧩 Which component blows if current is high? (a) thermistor (b) transistor (c) fuse (d) resistor
  33. 33.What does a fuse do? (a) lets current go one way (b) makes a beeping sound (c) beeps for an alarm (d) blows if current is high
  34. 34.🧩 Which part changes electrical energy into movement? (a) a motor (b) an LED (c) a fuse (d) a resistor
  35. 35.What does a buzzer do? (a) boosts a small signal (b) beeps for an alarm (c) senses how bright it is (d) has coloured bands
  36. 36.True or false: a fuse blows if current is high. (a) True (b) False
  37. 37.True or false: a buzzer makes a beeping sound. (a) False (b) True
  38. 38.🧩 Which component stores a little charge? (a) capacitor (b) thermistor (c) buzzer (d) resistor
  39. 39.True or false: a diode boosts a small signal. (a) True (b) False
  40. 40.True or false: a transistor boosts a small signal. (a) True (b) False

Answer key

  1. senses how bright it is
  2. resistor
  3. False
  4. limits the current
  5. store charge briefly
  6. diode
  7. False
  8. True
  9. is a resistance knob
  10. smooths a wobbly supply
  11. a buzzer
  12. transistor
  13. False
  14. motor
  15. motor
  16. boosts a small signal
  17. LDR
  18. True
  19. False
  20. glows using little power
  21. False
  22. makes a beeping sound
  23. potentiometer
  24. stores a little charge
  25. False
  26. True
  27. True
  28. False
  29. True
  30. senses how hot it is
  31. False
  32. fuse
  33. blows if current is high
  34. a motor
  35. beeps for an alarm
  36. True
  37. True
  38. capacitor
  39. False
  40. True

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