← Electronic components lesson New set →

Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 286 · 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 LED do? (a) beeps for an alarm (b) glows using little power (c) turns a fan or wheels (d) has coloured bands
  2. 2.🧩 Which component turns a fan or wheels? (a) motor (b) transistor (c) resistor (d) buzzer
  3. 3.🧩 Which part changes electrical energy into sound? (a) a diode (b) a resistor (c) a buzzer (d) a capacitor
  4. 4.🧩 A capacitor in a circuit can … (a) make light (b) measure heat (c) store charge briefly (d) spin a wheel
  5. 5.🧩 Which component blows if current is high? (a) fuse (b) motor (c) potentiometer (d) buzzer
  6. 6.What does an LDR do? (a) senses how bright it is (b) lets current go one way (c) glows using little power (d) makes things spin
  7. 7.🧩 Which component makes a beeping sound? (a) buzzer (b) fuse (c) motor (d) potentiometer
  8. 8.What does a diode do? (a) lets current go one way (b) limits the current (c) makes a beeping sound (d) glows using little power
  9. 9.🧩 Which component smooths a wobbly supply? (a) LDR (b) diode (c) thermistor (d) capacitor
  10. 10.What does a fuse do? (a) boosts a small signal (b) limits the current (c) has coloured bands (d) blows if current is high
  11. 11.What does a capacitor do? (a) has coloured bands (b) stores a little charge (c) glows using little power (d) lets current go one way
  12. 12.🧩 Which part changes electrical energy into movement? (a) an LED (b) a resistor (c) a fuse (d) a motor
  13. 13.🧩 Which component lets current go one way? (a) resistor (b) diode (c) transistor (d) motor
  14. 14.🧩 Which component boosts a small signal? (a) capacitor (b) transistor (c) LDR (d) thermistor
  15. 15.True or false: an LED senses how hot it is. (a) False (b) True
  16. 16.🧩 Which component senses how bright it is? (a) resistor (b) motor (c) LDR (d) transistor
  17. 17.What does a buzzer do? (a) makes a beeping sound (b) has coloured bands (c) limits the current (d) boosts a small signal
  18. 18.True or false: an LED glows using little power. (a) True (b) False
  19. 19.🧩 Which component limits the current? (a) buzzer (b) motor (c) resistor (d) potentiometer
  20. 20.True or false: an LDR has coloured bands. (a) True (b) False
  21. 21.True or false: a diode makes a beeping sound. (a) True (b) False
  22. 22.What does a buzzer do? (a) senses how hot it is (b) lets current go one way (c) boosts a small signal (d) beeps for an alarm
  23. 23.True or false: a buzzer makes a beeping sound. (a) True (b) False
  24. 24.🧩 Which component senses how hot it is? (a) capacitor (b) thermistor (c) potentiometer (d) LDR
  25. 25.True or false: a potentiometer makes things spin. (a) False (b) True
  26. 26.True or false: a fuse blows if current is high. (a) True (b) False
  27. 27.What does a transistor do? (a) beeps for an alarm (b) boosts a small signal (c) makes a beeping sound (d) makes things spin
  28. 28.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
  29. 29.True or false: a resistor blows if current is high. (a) True (b) False
  30. 30.True or false: a buzzer smooths a wobbly supply. (a) True (b) False
  31. 31.True or false: a motor boosts a small signal. (a) False (b) True
  32. 32.True or false: a fuse stores a little charge. (a) False (b) True
  33. 33.🧩 Which component makes things spin? (a) thermistor (b) buzzer (c) capacitor (d) motor
  34. 34.What does a thermistor do? (a) limits the current (b) makes things spin (c) has coloured bands (d) senses how hot it is
  35. 35.True or false: a motor smooths a wobbly supply. (a) True (b) False
  36. 36.True or false: a capacitor stores a little charge. (a) False (b) True
  37. 37.True or false: a resistor limits the current. (a) False (b) True
  38. 38.What does a resistor do? (a) blows if current is high (b) stores a little charge (c) limits the current (d) senses how bright it is
  39. 39.True or false: a thermistor senses how hot it is. (a) False (b) True
  40. 40.What does a motor do? (a) makes things spin (b) boosts a small signal (c) makes a beeping sound (d) smooths a wobbly supply

Answer key

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

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