← Electronic components lesson New set →

Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 190 · 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 component glows using little power? (a) thermistor (b) capacitor (c) motor (d) LED
  2. 2.🧩 A capacitor in a circuit can … (a) spin a wheel (b) make light (c) measure heat (d) store charge briefly
  3. 3.What does a capacitor do? (a) is a resistance knob (b) stores a little charge (c) blows if current is high (d) has coloured bands
  4. 4.True or false: a buzzer makes a beeping sound. (a) False (b) True
  5. 5.True or false: a capacitor smooths a wobbly supply. (a) True (b) False
  6. 6.True or false: a capacitor is a resistance knob. (a) False (b) True
  7. 7.🧩 Which component makes things spin? (a) motor (b) LDR (c) potentiometer (d) fuse
  8. 8.True or false: a resistor turns a fan or wheels. (a) True (b) False
  9. 9.What does a diode do? (a) beeps for an alarm (b) makes things spin (c) lets current go one way (d) makes a beeping sound
  10. 10.🧩 Which component lets current go one way? (a) diode (b) buzzer (c) fuse (d) thermistor
  11. 11.What does an LDR do? (a) turns a fan or wheels (b) glows using little power (c) smooths a wobbly supply (d) senses how bright it is
  12. 12.🧩 Which component is a resistance knob? (a) LDR (b) buzzer (c) potentiometer (d) capacitor
  13. 13.🧩 Which component senses how hot it is? (a) thermistor (b) resistor (c) fuse (d) LED
  14. 14.True or false: a transistor boosts a small signal. (a) False (b) True
  15. 15.🧩 Which component limits the current? (a) LED (b) fuse (c) thermistor (d) resistor
  16. 16.True or false: a motor is a resistance knob. (a) True (b) False
  17. 17.True or false: a resistor has coloured bands. (a) False (b) True
  18. 18.🧩 Which part changes electrical energy into movement? (a) an LED (b) a resistor (c) a fuse (d) a motor
  19. 19.🧩 Which component blows if current is high? (a) motor (b) LDR (c) capacitor (d) fuse
  20. 20.What does a resistor do? (a) boosts a small signal (b) smooths a wobbly supply (c) has coloured bands (d) blows if current is high
  21. 21.What does a potentiometer do? (a) blows if current is high (b) has coloured bands (c) glows using little power (d) is a resistance knob
  22. 22.True or false: a resistor limits the current. (a) False (b) True
  23. 23.What does a fuse do? (a) makes a beeping sound (b) beeps for an alarm (c) smooths a wobbly supply (d) blows if current is high
  24. 24.True or false: a thermistor senses how hot it is. (a) True (b) False
  25. 25.What does an LED do? (a) turns a fan or wheels (b) makes things spin (c) blows if current is high (d) glows using little power
  26. 26.True or false: a resistor makes a beeping sound. (a) True (b) False
  27. 27.🧩 Which component has coloured bands? (a) resistor (b) capacitor (c) LED (d) diode
  28. 28.True or false: a diode lets current go one way. (a) True (b) False
  29. 29.🧩 Which part changes electrical energy into sound? (a) a diode (b) a resistor (c) a buzzer (d) a capacitor
  30. 30.🧩 Which component makes a beeping sound? (a) buzzer (b) resistor (c) capacitor (d) fuse
  31. 31.True or false: a capacitor makes a beeping sound. (a) False (b) True
  32. 32.True or false: a fuse senses how bright it is. (a) False (b) True
  33. 33.True or false: a capacitor stores a little charge. (a) False (b) True
  34. 34.🧩 Which component stores a little charge? (a) diode (b) capacitor (c) transistor (d) fuse
  35. 35.🧩 Which component senses how bright it is? (a) transistor (b) motor (c) diode (d) LDR
  36. 36.True or false: a potentiometer makes a beeping sound. (a) True (b) False
  37. 37.🧩 Which component smooths a wobbly supply? (a) resistor (b) capacitor (c) fuse (d) potentiometer
  38. 38.What does a resistor do? (a) glows using little power (b) makes things spin (c) senses how bright it is (d) limits the current
  39. 39.True or false: a capacitor boosts a small signal. (a) False (b) True
  40. 40.True or false: an LDR smooths a wobbly supply. (a) True (b) False

Answer key

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

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