← Electronic components lesson New set →

Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 617 · 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) boosts a small signal (b) has coloured bands (c) smooths a wobbly supply (d) turns a fan or wheels
  2. 2.What does a buzzer do? (a) is a resistance knob (b) has coloured bands (c) beeps for an alarm (d) blows if current is high
  3. 3.🧩 Which part changes electrical energy into sound? (a) a diode (b) a resistor (c) a capacitor (d) a buzzer
  4. 4.🧩 Which component limits the current? (a) LDR (b) thermistor (c) fuse (d) resistor
  5. 5.True or false: a diode limits the current. (a) True (b) False
  6. 6.🧩 A capacitor in a circuit can … (a) measure heat (b) store charge briefly (c) spin a wheel (d) make light
  7. 7.True or false: a transistor turns a fan or wheels. (a) False (b) True
  8. 8.🧩 Which part changes electrical energy into movement? (a) an LED (b) a motor (c) a resistor (d) a fuse
  9. 9.🧩 Which component senses how bright it is? (a) fuse (b) potentiometer (c) resistor (d) LDR
  10. 10.True or false: a capacitor smooths a wobbly supply. (a) True (b) False
  11. 11.What does an LDR do? (a) senses how bright it is (b) stores a little charge (c) smooths a wobbly supply (d) limits the current
  12. 12.What does a resistor do? (a) is a resistance knob (b) makes things spin (c) smooths a wobbly supply (d) limits the current
  13. 13.What does a diode do? (a) boosts a small signal (b) is a resistance knob (c) senses how bright it is (d) lets current go one way
  14. 14.True or false: a diode beeps for an alarm. (a) True (b) False
  15. 15.What does a capacitor do? (a) makes a beeping sound (b) turns a fan or wheels (c) glows using little power (d) smooths a wobbly supply
  16. 16.🧩 Which component blows if current is high? (a) potentiometer (b) capacitor (c) fuse (d) diode
  17. 17.True or false: a motor makes things spin. (a) False (b) True
  18. 18.🧩 Which component makes a beeping sound? (a) transistor (b) LDR (c) buzzer (d) LED
  19. 19.True or false: a buzzer makes a beeping sound. (a) False (b) True
  20. 20.🧩 Which component turns a fan or wheels? (a) LDR (b) diode (c) motor (d) potentiometer
  21. 21.🧩 Which component glows using little power? (a) buzzer (b) motor (c) LED (d) resistor
  22. 22.What does an LED do? (a) has coloured bands (b) glows using little power (c) limits the current (d) senses how bright it is
  23. 23.What does a motor do? (a) is a resistance knob (b) makes things spin (c) makes a beeping sound (d) senses how hot it is
  24. 24.🧩 Which component boosts a small signal? (a) transistor (b) resistor (c) diode (d) LED
  25. 25.True or false: a resistor makes a beeping sound. (a) True (b) False
  26. 26.🧩 Which component beeps for an alarm? (a) capacitor (b) LDR (c) motor (d) buzzer
  27. 27.What does a fuse do? (a) turns a fan or wheels (b) stores a little charge (c) blows if current is high (d) lets current go one way
  28. 28.🧩 Which component lets current go one way? (a) motor (b) buzzer (c) transistor (d) diode
  29. 29.True or false: a diode lets current go one way. (a) True (b) False
  30. 30.True or false: a thermistor senses how hot it is. (a) False (b) True
  31. 31.True or false: a resistor smooths a wobbly supply. (a) True (b) False
  32. 32.What does a potentiometer do? (a) makes a beeping sound (b) is a resistance knob (c) smooths a wobbly supply (d) stores a little charge
  33. 33.True or false: a thermistor boosts a small signal. (a) True (b) False
  34. 34.True or false: a capacitor stores a little charge. (a) False (b) True
  35. 35.True or false: a fuse lets current go one way. (a) True (b) False
  36. 36.What does a buzzer do? (a) glows using little power (b) lets current go one way (c) boosts a small signal (d) makes a beeping sound
  37. 37.What does a capacitor do? (a) beeps for an alarm (b) glows using little power (c) makes a beeping sound (d) stores a little charge
  38. 38.🧩 Which component makes things spin? (a) fuse (b) LED (c) motor (d) capacitor
  39. 39.🧩 Which component has coloured bands? (a) LDR (b) resistor (c) potentiometer (d) diode
  40. 40.True or false: a buzzer beeps for an alarm. (a) True (b) False

Answer key

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

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