← Electronic components lesson New set →

Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 299 · 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 fuse do? (a) makes things spin (b) lets current go one way (c) blows if current is high (d) makes a beeping sound
  2. 2.🧩 Which component blows if current is high? (a) thermistor (b) buzzer (c) transistor (d) fuse
  3. 3.True or false: a fuse blows if current is high. (a) False (b) True
  4. 4.🧩 A capacitor in a circuit can … (a) spin a wheel (b) make light (c) store charge briefly (d) measure heat
  5. 5.True or false: a resistor senses how hot it is. (a) False (b) True
  6. 6.True or false: an LED glows using little power. (a) False (b) True
  7. 7.🧩 Which component lets current go one way? (a) LED (b) resistor (c) diode (d) capacitor
  8. 8.🧩 Which component has coloured bands? (a) resistor (b) capacitor (c) transistor (d) buzzer
  9. 9.True or false: a resistor makes a beeping sound. (a) True (b) False
  10. 10.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a diode (c) a capacitor (d) a buzzer
  11. 11.🧩 Which part changes electrical energy into movement? (a) an LED (b) a resistor (c) a fuse (d) a motor
  12. 12.What does a potentiometer do? (a) stores a little charge (b) limits the current (c) is a resistance knob (d) smooths a wobbly supply
  13. 13.True or false: a resistor senses how bright it is. (a) True (b) False
  14. 14.True or false: a capacitor stores a little charge. (a) True (b) False
  15. 15.🧩 Which component smooths a wobbly supply? (a) fuse (b) resistor (c) thermistor (d) capacitor
  16. 16.What does a capacitor do? (a) senses how bright it is (b) beeps for an alarm (c) smooths a wobbly supply (d) is a resistance knob
  17. 17.🧩 Which component limits the current? (a) diode (b) thermistor (c) motor (d) resistor
  18. 18.🧩 Which component senses how bright it is? (a) capacitor (b) thermistor (c) LDR (d) buzzer
  19. 19.True or false: a buzzer makes a beeping sound. (a) False (b) True
  20. 20.True or false: a thermistor makes a beeping sound. (a) False (b) True
  21. 21.True or false: a potentiometer is a resistance knob. (a) True (b) False
  22. 22.🧩 Which component makes things spin? (a) potentiometer (b) transistor (c) motor (d) buzzer
  23. 23.What does a motor do? (a) makes things spin (b) smooths a wobbly supply (c) limits the current (d) stores a little charge
  24. 24.🧩 Which component turns a fan or wheels? (a) buzzer (b) capacitor (c) diode (d) motor
  25. 25.What does a transistor do? (a) is a resistance knob (b) makes things spin (c) boosts a small signal (d) stores a little charge
  26. 26.🧩 Which component stores a little charge? (a) capacitor (b) motor (c) fuse (d) buzzer
  27. 27.True or false: a transistor stores a little charge. (a) False (b) True
  28. 28.🧩 Which component makes a beeping sound? (a) thermistor (b) buzzer (c) transistor (d) motor
  29. 29.True or false: an LDR smooths a wobbly supply. (a) True (b) False
  30. 30.🧩 Which component is a resistance knob? (a) fuse (b) diode (c) potentiometer (d) buzzer
  31. 31.True or false: a motor senses how bright it is. (a) False (b) True
  32. 32.What does a resistor do? (a) lets current go one way (b) is a resistance knob (c) makes a beeping sound (d) limits the current
  33. 33.True or false: a resistor lets current go one way. (a) False (b) True
  34. 34.🧩 Which component boosts a small signal? (a) transistor (b) LDR (c) capacitor (d) LED
  35. 35.🧩 Which component senses how hot it is? (a) fuse (b) thermistor (c) capacitor (d) resistor
  36. 36.What does a resistor do? (a) has coloured bands (b) is a resistance knob (c) glows using little power (d) stores a little charge
  37. 37.True or false: a thermistor senses how hot it is. (a) False (b) True
  38. 38.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
  39. 39.True or false: an LDR senses how bright it is. (a) False (b) True
  40. 40.True or false: a motor makes things spin. (a) False (b) True

Answer key

  1. blows if current is high
  2. fuse
  3. True
  4. store charge briefly
  5. False
  6. True
  7. diode
  8. resistor
  9. False
  10. a buzzer
  11. a motor
  12. is a resistance knob
  13. False
  14. True
  15. capacitor
  16. smooths a wobbly supply
  17. resistor
  18. LDR
  19. True
  20. False
  21. True
  22. motor
  23. makes things spin
  24. motor
  25. boosts a small signal
  26. capacitor
  27. False
  28. buzzer
  29. False
  30. potentiometer
  31. False
  32. limits the current
  33. False
  34. transistor
  35. thermistor
  36. has coloured bands
  37. True
  38. True
  39. True
  40. True

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