← Electronic components lesson New set →

Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 142 · 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 resistor blows if current is high. (a) True (b) False
  2. 2.🧩 Which part changes electrical energy into movement? (a) an LED (b) a fuse (c) a resistor (d) a motor
  3. 3.True or false: a buzzer stores a little charge. (a) True (b) False
  4. 4.What does a potentiometer do? (a) is a resistance knob (b) smooths a wobbly supply (c) boosts a small signal (d) senses how bright it is
  5. 5.True or false: a buzzer senses how bright it is. (a) True (b) False
  6. 6.True or false: a buzzer senses how hot it is. (a) True (b) False
  7. 7.🧩 Which component turns a fan or wheels? (a) thermistor (b) potentiometer (c) motor (d) capacitor
  8. 8.🧩 Which component has coloured bands? (a) diode (b) resistor (c) buzzer (d) transistor
  9. 9.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
  10. 10.🧩 Which component boosts a small signal? (a) transistor (b) diode (c) motor (d) buzzer
  11. 11.What does a thermistor do? (a) blows if current is high (b) senses how hot it is (c) boosts a small signal (d) has coloured bands
  12. 12.🧩 Which component smooths a wobbly supply? (a) thermistor (b) diode (c) capacitor (d) LED
  13. 13.🧩 Which part changes electrical energy into sound? (a) a buzzer (b) a diode (c) a resistor (d) a capacitor
  14. 14.What does a diode do? (a) lets current go one way (b) senses how bright it is (c) limits the current (d) stores a little charge
  15. 15.🧩 Which component senses how bright it is? (a) LDR (b) LED (c) motor (d) transistor
  16. 16.What does a fuse do? (a) blows if current is high (b) glows using little power (c) makes a beeping sound (d) stores a little charge
  17. 17.🧩 A capacitor in a circuit can … (a) measure heat (b) store charge briefly (c) make light (d) spin a wheel
  18. 18.What does a transistor do? (a) makes a beeping sound (b) is a resistance knob (c) lets current go one way (d) boosts a small signal
  19. 19.True or false: a resistor turns a fan or wheels. (a) True (b) False
  20. 20.True or false: a buzzer makes a beeping sound. (a) True (b) False
  21. 21.True or false: an LDR is a resistance knob. (a) False (b) True
  22. 22.What does an LDR do? (a) beeps for an alarm (b) is a resistance knob (c) senses how bright it is (d) makes things spin
  23. 23.True or false: a thermistor makes things spin. (a) True (b) False
  24. 24.True or false: a motor boosts a small signal. (a) True (b) False
  25. 25.True or false: a thermistor stores a little charge. (a) True (b) False
  26. 26.What does a motor do? (a) beeps for an alarm (b) is a resistance knob (c) lets current go one way (d) makes things spin
  27. 27.🧩 Which component is a resistance knob? (a) potentiometer (b) diode (c) motor (d) resistor
  28. 28.🧩 Which component makes a beeping sound? (a) buzzer (b) diode (c) LED (d) resistor
  29. 29.True or false: a fuse lets current go one way. (a) True (b) False
  30. 30.True or false: a fuse glows using little power. (a) True (b) False
  31. 31.True or false: a thermistor senses how hot it is. (a) False (b) True
  32. 32.True or false: a potentiometer makes things spin. (a) True (b) False
  33. 33.What does a capacitor do? (a) boosts a small signal (b) has coloured bands (c) smooths a wobbly supply (d) makes a beeping sound
  34. 34.🧩 Which component senses how hot it is? (a) LDR (b) fuse (c) capacitor (d) thermistor
  35. 35.What does a resistor do? (a) lets current go one way (b) is a resistance knob (c) has coloured bands (d) makes things spin
  36. 36.What does a capacitor do? (a) senses how bright it is (b) senses how hot it is (c) stores a little charge (d) makes things spin
  37. 37.What does a buzzer do? (a) is a resistance knob (b) smooths a wobbly supply (c) makes a beeping sound (d) limits the current
  38. 38.What does a buzzer do? (a) lets current go one way (b) beeps for an alarm (c) senses how hot it is (d) is a resistance knob
  39. 39.True or false: a motor makes things spin. (a) True (b) False
  40. 40.True or false: a potentiometer boosts a small signal. (a) False (b) True

Answer key

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

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