← Electronic components lesson New set →

Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 491 · 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 senses how hot it is? (a) thermistor (b) resistor (c) potentiometer (d) LED
  2. 2.🧩 Which component smooths a wobbly supply? (a) motor (b) potentiometer (c) capacitor (d) thermistor
  3. 3.What does a motor do? (a) lets current go one way (b) smooths a wobbly supply (c) stores a little charge (d) makes things spin
  4. 4.What does a resistor do? (a) senses how bright it is (b) makes things spin (c) blows if current is high (d) has coloured bands
  5. 5.True or false: an LDR boosts a small signal. (a) False (b) True
  6. 6.True or false: a fuse has coloured bands. (a) True (b) False
  7. 7.🧩 Which component blows if current is high? (a) diode (b) motor (c) thermistor (d) fuse
  8. 8.True or false: a capacitor stores a little charge. (a) True (b) False
  9. 9.True or false: a resistor limits the current. (a) False (b) True
  10. 10.🧩 A capacitor in a circuit can … (a) spin a wheel (b) measure heat (c) make light (d) store charge briefly
  11. 11.🧩 Which part changes electrical energy into movement? (a) a fuse (b) a resistor (c) an LED (d) a motor
  12. 12.What does an LDR do? (a) turns a fan or wheels (b) senses how bright it is (c) boosts a small signal (d) makes things spin
  13. 13.🧩 Which component turns a fan or wheels? (a) motor (b) buzzer (c) thermistor (d) diode
  14. 14.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a diode (c) a capacitor (d) a buzzer
  15. 15.🧩 Which component limits the current? (a) thermistor (b) buzzer (c) resistor (d) LDR
  16. 16.What does a transistor do? (a) limits the current (b) senses how bright it is (c) boosts a small signal (d) makes things spin
  17. 17.What does a thermistor do? (a) senses how hot it is (b) limits the current (c) smooths a wobbly supply (d) stores a little charge
  18. 18.🧩 Which component has coloured bands? (a) motor (b) capacitor (c) resistor (d) buzzer
  19. 19.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
  20. 20.True or false: a resistor beeps for an alarm. (a) False (b) True
  21. 21.What does a buzzer do? (a) has coloured bands (b) makes a beeping sound (c) limits the current (d) is a resistance knob
  22. 22.True or false: a thermistor senses how hot it is. (a) True (b) False
  23. 23.🧩 Which component senses how bright it is? (a) capacitor (b) LDR (c) resistor (d) motor
  24. 24.What does a resistor do? (a) blows if current is high (b) makes a beeping sound (c) limits the current (d) makes things spin
  25. 25.What does a fuse do? (a) makes a beeping sound (b) senses how hot it is (c) lets current go one way (d) blows if current is high
  26. 26.What does a capacitor do? (a) smooths a wobbly supply (b) lets current go one way (c) senses how hot it is (d) is a resistance knob
  27. 27.What does an LED do? (a) is a resistance knob (b) stores a little charge (c) makes a beeping sound (d) glows using little power
  28. 28.🧩 Which component makes things spin? (a) thermistor (b) transistor (c) motor (d) resistor
  29. 29.🧩 Which component makes a beeping sound? (a) LED (b) thermistor (c) capacitor (d) buzzer
  30. 30.What does a potentiometer do? (a) limits the current (b) glows using little power (c) is a resistance knob (d) senses how hot it is
  31. 31.True or false: a transistor limits the current. (a) False (b) True
  32. 32.🧩 Which component stores a little charge? (a) capacitor (b) LED (c) diode (d) LDR
  33. 33.🧩 Which component beeps for an alarm? (a) potentiometer (b) diode (c) buzzer (d) resistor
  34. 34.True or false: a diode lets current go one way. (a) True (b) False
  35. 35.🧩 Which component glows using little power? (a) resistor (b) LDR (c) transistor (d) LED
  36. 36.True or false: an LDR lets current go one way. (a) True (b) False
  37. 37.True or false: an LDR senses how bright it is. (a) True (b) False
  38. 38.🧩 Which component boosts a small signal? (a) LED (b) capacitor (c) transistor (d) potentiometer
  39. 39.True or false: a fuse makes a beeping sound. (a) False (b) True
  40. 40.True or false: an LDR turns a fan or wheels. (a) True (b) False

Answer key

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

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