← Electronic components lesson New set →

Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 69 · 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 part changes electrical energy into sound? (a) a diode (b) a capacitor (c) a buzzer (d) a resistor
  2. 2.True or false: a resistor senses how hot it is. (a) True (b) False
  3. 3.True or false: a buzzer makes things spin. (a) True (b) False
  4. 4.🧩 A capacitor in a circuit can … (a) measure heat (b) make light (c) store charge briefly (d) spin a wheel
  5. 5.What does a diode do? (a) turns a fan or wheels (b) limits the current (c) lets current go one way (d) makes things spin
  6. 6.True or false: a capacitor senses how hot it is. (a) False (b) True
  7. 7.🧩 Which component beeps for an alarm? (a) LED (b) fuse (c) resistor (d) buzzer
  8. 8.True or false: a thermistor beeps for an alarm. (a) True (b) False
  9. 9.🧩 Which component boosts a small signal? (a) capacitor (b) transistor (c) thermistor (d) resistor
  10. 10.True or false: a thermistor limits the current. (a) True (b) False
  11. 11.What does a capacitor do? (a) is a resistance knob (b) senses how hot it is (c) stores a little charge (d) glows using little power
  12. 12.What does a motor do? (a) senses how bright it is (b) turns a fan or wheels (c) blows if current is high (d) boosts a small signal
  13. 13.True or false: a diode lets current go one way. (a) False (b) True
  14. 14.🧩 Which component is a resistance knob? (a) LED (b) motor (c) transistor (d) potentiometer
  15. 15.🧩 Which component has coloured bands? (a) resistor (b) fuse (c) buzzer (d) capacitor
  16. 16.🧩 Which part changes electrical energy into movement? (a) an LED (b) a resistor (c) a fuse (d) a motor
  17. 17.🧩 Which component blows if current is high? (a) fuse (b) transistor (c) buzzer (d) capacitor
  18. 18.🧩 Which component smooths a wobbly supply? (a) LDR (b) transistor (c) potentiometer (d) capacitor
  19. 19.True or false: a transistor senses how bright it is. (a) True (b) False
  20. 20.What does a resistor do? (a) senses how bright it is (b) blows if current is high (c) has coloured bands (d) is a resistance knob
  21. 21.What does a buzzer do? (a) blows if current is high (b) turns a fan or wheels (c) beeps for an alarm (d) has coloured bands
  22. 22.What does a buzzer do? (a) turns a fan or wheels (b) senses how bright it is (c) is a resistance knob (d) makes a beeping sound
  23. 23.🧩 Which component makes a beeping sound? (a) potentiometer (b) motor (c) buzzer (d) capacitor
  24. 24.True or false: a buzzer makes a beeping sound. (a) True (b) False
  25. 25.True or false: a capacitor smooths a wobbly supply. (a) True (b) False
  26. 26.True or false: an LED glows using little power. (a) False (b) True
  27. 27.What does an LDR do? (a) limits the current (b) senses how bright it is (c) blows if current is high (d) makes a beeping sound
  28. 28.True or false: a capacitor senses how bright it is. (a) False (b) True
  29. 29.True or false: a resistor has coloured bands. (a) False (b) True
  30. 30.What does a resistor do? (a) lets current go one way (b) stores a little charge (c) senses how bright it is (d) limits the current
  31. 31.🧩 Which component limits the current? (a) thermistor (b) diode (c) capacitor (d) resistor
  32. 32.🧩 Which component stores a little charge? (a) potentiometer (b) LED (c) diode (d) capacitor
  33. 33.🧩 Which component glows using little power? (a) buzzer (b) LED (c) motor (d) LDR
  34. 34.What does a thermistor do? (a) blows if current is high (b) senses how hot it is (c) beeps for an alarm (d) stores a little charge
  35. 35.True or false: a capacitor stores a little charge. (a) False (b) True
  36. 36.True or false: a motor makes things spin. (a) True (b) False
  37. 37.True or false: a thermistor senses how hot it is. (a) False (b) True
  38. 38.True or false: an LED is a resistance knob. (a) True (b) False
  39. 39.True or false: a motor is a resistance knob. (a) True (b) False
  40. 40.What does an LED do? (a) senses how hot it is (b) senses how bright it is (c) glows using little power (d) blows if current is high

Answer key

  1. a buzzer
  2. False
  3. False
  4. store charge briefly
  5. lets current go one way
  6. False
  7. buzzer
  8. False
  9. transistor
  10. False
  11. stores a little charge
  12. turns a fan or wheels
  13. True
  14. potentiometer
  15. resistor
  16. a motor
  17. fuse
  18. capacitor
  19. False
  20. has coloured bands
  21. beeps for an alarm
  22. makes a beeping sound
  23. buzzer
  24. True
  25. True
  26. True
  27. senses how bright it is
  28. False
  29. True
  30. limits the current
  31. resistor
  32. capacitor
  33. LED
  34. senses how hot it is
  35. True
  36. True
  37. True
  38. False
  39. False
  40. glows using little power

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