← Electronic components lesson New set →

Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 269 · 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 blows if current is high? (a) motor (b) thermistor (c) capacitor (d) fuse
  2. 2.True or false: a fuse boosts a small signal. (a) True (b) False
  3. 3.🧩 Which component senses how bright it is? (a) diode (b) buzzer (c) resistor (d) LDR
  4. 4.🧩 Which component senses how hot it is? (a) buzzer (b) resistor (c) transistor (d) thermistor
  5. 5.🧩 Which component makes a beeping sound? (a) diode (b) motor (c) buzzer (d) LED
  6. 6.What does a transistor do? (a) is a resistance knob (b) senses how bright it is (c) boosts a small signal (d) limits the current
  7. 7.What does a resistor do? (a) smooths a wobbly supply (b) senses how hot it is (c) has coloured bands (d) glows using little power
  8. 8.🧩 Which component is a resistance knob? (a) potentiometer (b) fuse (c) buzzer (d) diode
  9. 9.True or false: a diode lets current go one way. (a) False (b) True
  10. 10.🧩 Which component has coloured bands? (a) potentiometer (b) diode (c) transistor (d) resistor
  11. 11.🧩 Which component limits the current? (a) thermistor (b) resistor (c) fuse (d) potentiometer
  12. 12.🧩 Which component glows using little power? (a) LED (b) LDR (c) motor (d) diode
  13. 13.What does a motor do? (a) makes things spin (b) makes a beeping sound (c) senses how hot it is (d) has coloured bands
  14. 14.🧩 Which component makes things spin? (a) LED (b) motor (c) thermistor (d) resistor
  15. 15.🧩 Which part changes electrical energy into movement? (a) an LED (b) a fuse (c) a motor (d) a resistor
  16. 16.What does a buzzer do? (a) is a resistance knob (b) limits the current (c) boosts a small signal (d) makes a beeping sound
  17. 17.🧩 A capacitor in a circuit can … (a) store charge briefly (b) make light (c) measure heat (d) spin a wheel
  18. 18.🧩 Which component beeps for an alarm? (a) LDR (b) fuse (c) buzzer (d) diode
  19. 19.What does a motor do? (a) smooths a wobbly supply (b) stores a little charge (c) turns a fan or wheels (d) senses how bright it is
  20. 20.🧩 Which component boosts a small signal? (a) buzzer (b) transistor (c) potentiometer (d) resistor
  21. 21.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a buzzer (c) a diode (d) a capacitor
  22. 22.True or false: a potentiometer makes things spin. (a) True (b) False
  23. 23.What does a potentiometer do? (a) turns a fan or wheels (b) smooths a wobbly supply (c) is a resistance knob (d) makes things spin
  24. 24.🧩 Which component lets current go one way? (a) thermistor (b) diode (c) LDR (d) buzzer
  25. 25.🧩 Which component stores a little charge? (a) motor (b) LED (c) capacitor (d) buzzer
  26. 26.True or false: a thermistor turns a fan or wheels. (a) True (b) False
  27. 27.What does an LDR do? (a) beeps for an alarm (b) lets current go one way (c) glows using little power (d) senses how bright it is
  28. 28.🧩 Which component turns a fan or wheels? (a) potentiometer (b) transistor (c) resistor (d) motor
  29. 29.True or false: a diode beeps for an alarm. (a) False (b) True
  30. 30.🧩 Which component smooths a wobbly supply? (a) potentiometer (b) capacitor (c) motor (d) fuse
  31. 31.True or false: an LDR stores a little charge. (a) False (b) True
  32. 32.What does a fuse do? (a) glows using little power (b) smooths a wobbly supply (c) blows if current is high (d) makes things spin
  33. 33.True or false: a diode smooths a wobbly supply. (a) True (b) False
  34. 34.True or false: a transistor boosts a small signal. (a) True (b) False
  35. 35.What does an LED do? (a) turns a fan or wheels (b) stores a little charge (c) has coloured bands (d) glows using little power
  36. 36.True or false: a fuse blows if current is high. (a) False (b) True
  37. 37.What does a diode do? (a) smooths a wobbly supply (b) lets current go one way (c) has coloured bands (d) limits the current
  38. 38.True or false: an LED senses how bright it is. (a) False (b) True
  39. 39.True or false: a capacitor turns a fan or wheels. (a) True (b) False
  40. 40.True or false: a fuse turns a fan or wheels. (a) False (b) True

Answer key

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

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