← Electronic components lesson New set →

Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 234 · 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.🧩 Which part changes electrical energy into movement? (a) a fuse (b) an LED (c) a resistor (d) a motor
  2. 2.True or false: a fuse blows if current is high. (a) True (b) False
  3. 3.True or false: a buzzer beeps for an alarm. (a) True (b) False
  4. 4.🧩 Which component smooths a wobbly supply? (a) potentiometer (b) buzzer (c) LDR (d) capacitor
  5. 5.🧩 Which component turns a fan or wheels? (a) resistor (b) motor (c) potentiometer (d) fuse
  6. 6.What does a motor do? (a) turns a fan or wheels (b) smooths a wobbly supply (c) has coloured bands (d) is a resistance knob
  7. 7.What does a resistor do? (a) turns a fan or wheels (b) beeps for an alarm (c) limits the current (d) senses how bright it is
  8. 8.🧩 A capacitor in a circuit can … (a) make light (b) measure heat (c) store charge briefly (d) spin a wheel
  9. 9.🧩 Which component limits the current? (a) diode (b) resistor (c) LED (d) buzzer
  10. 10.🧩 Which component beeps for an alarm? (a) potentiometer (b) LDR (c) LED (d) buzzer
  11. 11.True or false: a potentiometer glows using little power. (a) True (b) False
  12. 12.True or false: a thermistor limits the current. (a) False (b) True
  13. 13.What does a capacitor do? (a) stores a little charge (b) turns a fan or wheels (c) blows if current is high (d) lets current go one way
  14. 14.🧩 Which component senses how hot it is? (a) thermistor (b) LED (c) capacitor (d) resistor
  15. 15.True or false: a buzzer boosts a small signal. (a) False (b) True
  16. 16.True or false: a fuse senses how bright it is. (a) True (b) False
  17. 17.True or false: an LED blows if current is high. (a) False (b) True
  18. 18.True or false: a diode lets current go one way. (a) False (b) True
  19. 19.True or false: a capacitor stores a little charge. (a) True (b) False
  20. 20.What does an LED do? (a) lets current go one way (b) glows using little power (c) stores a little charge (d) limits the current
  21. 21.What does a buzzer do? (a) stores a little charge (b) makes a beeping sound (c) blows if current is high (d) senses how hot it is
  22. 22.What does a potentiometer do? (a) senses how hot it is (b) stores a little charge (c) makes things spin (d) is a resistance knob
  23. 23.🧩 Which component glows using little power? (a) motor (b) buzzer (c) diode (d) LED
  24. 24.🧩 Which component boosts a small signal? (a) LDR (b) transistor (c) resistor (d) fuse
  25. 25.True or false: a transistor blows if current is high. (a) True (b) False
  26. 26.What does an LDR do? (a) turns a fan or wheels (b) lets current go one way (c) senses how bright it is (d) makes things spin
  27. 27.🧩 Which component makes things spin? (a) diode (b) capacitor (c) buzzer (d) motor
  28. 28.True or false: a motor blows if current is high. (a) False (b) True
  29. 29.True or false: a thermistor senses how hot it is. (a) False (b) True
  30. 30.True or false: a diode makes a beeping sound. (a) True (b) False
  31. 31.True or false: a buzzer makes a beeping sound. (a) True (b) False
  32. 32.What does a transistor do? (a) beeps for an alarm (b) limits the current (c) has coloured bands (d) boosts a small signal
  33. 33.🧩 Which part changes electrical energy into sound? (a) a buzzer (b) a capacitor (c) a diode (d) a resistor
  34. 34.What does a diode do? (a) limits the current (b) lets current go one way (c) turns a fan or wheels (d) boosts a small signal
  35. 35.True or false: a transistor limits the current. (a) True (b) False
  36. 36.True or false: a resistor limits the current. (a) False (b) True
  37. 37.What does a resistor do? (a) has coloured bands (b) blows if current is high (c) turns a fan or wheels (d) lets current go one way
  38. 38.True or false: a buzzer stores a little charge. (a) True (b) False
  39. 39.True or false: a potentiometer smooths a wobbly supply. (a) True (b) False
  40. 40.What does a fuse do? (a) smooths a wobbly supply (b) glows using little power (c) stores a little charge (d) blows if current is high

Answer key

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

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