← Electronic components lesson New set →

Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 605 · 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.True or false: a buzzer stores a little charge. (a) True (b) False
  2. 2.True or false: a transistor boosts a small signal. (a) True (b) False
  3. 3.What does an LED do? (a) lets current go one way (b) turns a fan or wheels (c) is a resistance knob (d) glows using little power
  4. 4.What does a transistor do? (a) senses how hot it is (b) boosts a small signal (c) makes things spin (d) smooths a wobbly supply
  5. 5.🧩 Which component stores a little charge? (a) potentiometer (b) capacitor (c) LDR (d) buzzer
  6. 6.What does a capacitor do? (a) blows if current is high (b) lets current go one way (c) stores a little charge (d) makes things spin
  7. 7.🧩 Which part changes electrical energy into movement? (a) a fuse (b) a resistor (c) a motor (d) an LED
  8. 8.True or false: a motor boosts a small signal. (a) True (b) False
  9. 9.True or false: an LED makes things spin. (a) True (b) False
  10. 10.🧩 Which component limits the current? (a) transistor (b) LDR (c) potentiometer (d) resistor
  11. 11.🧩 Which component makes things spin? (a) capacitor (b) transistor (c) motor (d) fuse
  12. 12.🧩 Which component blows if current is high? (a) LED (b) diode (c) fuse (d) potentiometer
  13. 13.What does an LDR do? (a) smooths a wobbly supply (b) makes a beeping sound (c) is a resistance knob (d) senses how bright it is
  14. 14.🧩 A capacitor in a circuit can … (a) store charge briefly (b) make light (c) spin a wheel (d) measure heat
  15. 15.True or false: a capacitor stores a little charge. (a) True (b) False
  16. 16.What does a thermistor do? (a) is a resistance knob (b) limits the current (c) senses how hot it is (d) has coloured bands
  17. 17.True or false: a potentiometer makes a beeping sound. (a) True (b) False
  18. 18.🧩 Which component smooths a wobbly supply? (a) buzzer (b) potentiometer (c) capacitor (d) transistor
  19. 19.True or false: a capacitor has coloured bands. (a) True (b) False
  20. 20.🧩 Which component senses how bright it is? (a) LED (b) LDR (c) diode (d) fuse
  21. 21.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a diode (c) a capacitor (d) a buzzer
  22. 22.True or false: a motor blows if current is high. (a) True (b) False
  23. 23.🧩 Which component glows using little power? (a) transistor (b) buzzer (c) LED (d) fuse
  24. 24.🧩 Which component beeps for an alarm? (a) buzzer (b) motor (c) transistor (d) LED
  25. 25.True or false: a motor turns a fan or wheels. (a) False (b) True
  26. 26.True or false: a resistor limits the current. (a) True (b) False
  27. 27.True or false: a buzzer beeps for an alarm. (a) False (b) True
  28. 28.🧩 Which component is a resistance knob? (a) fuse (b) LED (c) potentiometer (d) capacitor
  29. 29.True or false: a fuse makes things spin. (a) True (b) False
  30. 30.What does a fuse do? (a) is a resistance knob (b) senses how hot it is (c) limits the current (d) blows if current is high
  31. 31.🧩 Which component turns a fan or wheels? (a) motor (b) potentiometer (c) LDR (d) buzzer
  32. 32.What does a potentiometer do? (a) limits the current (b) is a resistance knob (c) blows if current is high (d) glows using little power
  33. 33.What does a buzzer do? (a) boosts a small signal (b) senses how hot it is (c) senses how bright it is (d) beeps for an alarm
  34. 34.What does a resistor do? (a) turns a fan or wheels (b) stores a little charge (c) limits the current (d) makes a beeping sound
  35. 35.True or false: a capacitor limits the current. (a) True (b) False
  36. 36.What does a motor do? (a) senses how bright it is (b) blows if current is high (c) turns a fan or wheels (d) makes a beeping sound
  37. 37.🧩 Which component has coloured bands? (a) LED (b) LDR (c) thermistor (d) resistor
  38. 38.🧩 Which component boosts a small signal? (a) transistor (b) diode (c) motor (d) capacitor
  39. 39.🧩 Which component lets current go one way? (a) thermistor (b) buzzer (c) capacitor (d) diode
  40. 40.True or false: a diode is a resistance knob. (a) False (b) True

Answer key

  1. False
  2. True
  3. glows using little power
  4. boosts a small signal
  5. capacitor
  6. stores a little charge
  7. a motor
  8. False
  9. False
  10. resistor
  11. motor
  12. fuse
  13. senses how bright it is
  14. store charge briefly
  15. True
  16. senses how hot it is
  17. False
  18. capacitor
  19. False
  20. LDR
  21. a buzzer
  22. False
  23. LED
  24. buzzer
  25. True
  26. True
  27. True
  28. potentiometer
  29. False
  30. blows if current is high
  31. motor
  32. is a resistance knob
  33. beeps for an alarm
  34. limits the current
  35. False
  36. turns a fan or wheels
  37. resistor
  38. transistor
  39. diode
  40. False

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