← Electronic components lesson New set →

Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 619 · 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 transistor do? (a) stores a little charge (b) makes a beeping sound (c) has coloured bands (d) boosts a small signal
  2. 2.What does a motor do? (a) is a resistance knob (b) beeps for an alarm (c) makes things spin (d) limits the current
  3. 3.True or false: a buzzer beeps for an alarm. (a) False (b) True
  4. 4.🧩 Which part changes electrical energy into movement? (a) an LED (b) a fuse (c) a resistor (d) a motor
  5. 5.True or false: a capacitor stores a little charge. (a) False (b) True
  6. 6.True or false: an LED lets current go one way. (a) True (b) False
  7. 7.What does a diode do? (a) stores a little charge (b) makes things spin (c) limits the current (d) lets current go one way
  8. 8.What does an LDR do? (a) boosts a small signal (b) senses how hot it is (c) senses how bright it is (d) has coloured bands
  9. 9.🧩 Which component stores a little charge? (a) buzzer (b) capacitor (c) resistor (d) LDR
  10. 10.What does a thermistor do? (a) beeps for an alarm (b) senses how hot it is (c) blows if current is high (d) boosts a small signal
  11. 11.🧩 Which component senses how hot it is? (a) capacitor (b) thermistor (c) buzzer (d) motor
  12. 12.🧩 A capacitor in a circuit can … (a) spin a wheel (b) store charge briefly (c) make light (d) measure heat
  13. 13.True or false: a transistor boosts a small signal. (a) False (b) True
  14. 14.True or false: a buzzer has coloured bands. (a) True (b) False
  15. 15.🧩 Which component lets current go one way? (a) diode (b) transistor (c) resistor (d) LED
  16. 16.🧩 Which component smooths a wobbly supply? (a) buzzer (b) transistor (c) motor (d) capacitor
  17. 17.🧩 Which part changes electrical energy into sound? (a) a diode (b) a buzzer (c) a resistor (d) a capacitor
  18. 18.True or false: a capacitor turns a fan or wheels. (a) False (b) True
  19. 19.🧩 Which component blows if current is high? (a) resistor (b) motor (c) fuse (d) transistor
  20. 20.True or false: a transistor lets current go one way. (a) True (b) False
  21. 21.🧩 Which component has coloured bands? (a) thermistor (b) fuse (c) transistor (d) resistor
  22. 22.🧩 Which component makes a beeping sound? (a) resistor (b) buzzer (c) LED (d) LDR
  23. 23.What does an LED do? (a) blows if current is high (b) glows using little power (c) limits the current (d) makes a beeping sound
  24. 24.True or false: a buzzer makes things spin. (a) True (b) False
  25. 25.🧩 Which component turns a fan or wheels? (a) buzzer (b) motor (c) LED (d) potentiometer
  26. 26.🧩 Which component senses how bright it is? (a) diode (b) potentiometer (c) LDR (d) fuse
  27. 27.🧩 Which component boosts a small signal? (a) thermistor (b) diode (c) buzzer (d) transistor
  28. 28.What does a resistor do? (a) lets current go one way (b) stores a little charge (c) blows if current is high (d) has coloured bands
  29. 29.🧩 Which component is a resistance knob? (a) fuse (b) resistor (c) diode (d) potentiometer
  30. 30.True or false: a capacitor limits the current. (a) False (b) True
  31. 31.What does a capacitor do? (a) makes things spin (b) smooths a wobbly supply (c) has coloured bands (d) boosts a small signal
  32. 32.True or false: a resistor has coloured bands. (a) True (b) False
  33. 33.🧩 Which component makes things spin? (a) capacitor (b) LDR (c) thermistor (d) motor
  34. 34.🧩 Which component glows using little power? (a) resistor (b) fuse (c) LED (d) LDR
  35. 35.True or false: an LDR has coloured bands. (a) False (b) True
  36. 36.🧩 Which component beeps for an alarm? (a) potentiometer (b) LED (c) resistor (d) buzzer
  37. 37.True or false: a resistor senses how bright it is. (a) True (b) False
  38. 38.True or false: a thermistor beeps for an alarm. (a) True (b) False
  39. 39.True or false: a motor blows if current is high. (a) True (b) False
  40. 40.True or false: a motor lets current go one way. (a) False (b) True

Answer key

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

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