← Electronic components lesson New set →

Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 295 · 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 resistor do? (a) is a resistance knob (b) has coloured bands (c) stores a little charge (d) beeps for an alarm
  2. 2.True or false: a capacitor turns a fan or wheels. (a) False (b) True
  3. 3.🧩 Which component turns a fan or wheels? (a) potentiometer (b) motor (c) buzzer (d) thermistor
  4. 4.True or false: a thermistor makes a beeping sound. (a) False (b) True
  5. 5.🧩 Which component beeps for an alarm? (a) buzzer (b) motor (c) fuse (d) capacitor
  6. 6.🧩 Which component has coloured bands? (a) fuse (b) LDR (c) diode (d) resistor
  7. 7.🧩 Which part changes electrical energy into movement? (a) a resistor (b) a fuse (c) an LED (d) a motor
  8. 8.True or false: a potentiometer stores a little charge. (a) True (b) False
  9. 9.🧩 Which component smooths a wobbly supply? (a) diode (b) potentiometer (c) fuse (d) capacitor
  10. 10.What does a buzzer do? (a) beeps for an alarm (b) glows using little power (c) smooths a wobbly supply (d) stores a little charge
  11. 11.True or false: a motor makes things spin. (a) True (b) False
  12. 12.🧩 Which component makes a beeping sound? (a) fuse (b) resistor (c) diode (d) buzzer
  13. 13.🧩 Which component is a resistance knob? (a) potentiometer (b) resistor (c) fuse (d) buzzer
  14. 14.True or false: a fuse makes a beeping sound. (a) False (b) True
  15. 15.What does a potentiometer do? (a) boosts a small signal (b) senses how hot it is (c) is a resistance knob (d) smooths a wobbly supply
  16. 16.True or false: a potentiometer beeps for an alarm. (a) True (b) False
  17. 17.🧩 Which component stores a little charge? (a) fuse (b) capacitor (c) LED (d) buzzer
  18. 18.What does a thermistor do? (a) makes things spin (b) has coloured bands (c) senses how hot it is (d) stores a little charge
  19. 19.What does a resistor do? (a) limits the current (b) stores a little charge (c) glows using little power (d) beeps for an alarm
  20. 20.🧩 Which component limits the current? (a) potentiometer (b) buzzer (c) transistor (d) resistor
  21. 21.What does an LED do? (a) boosts a small signal (b) glows using little power (c) senses how hot it is (d) has coloured bands
  22. 22.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a diode (c) a resistor (d) a buzzer
  23. 23.🧩 Which component makes things spin? (a) motor (b) capacitor (c) potentiometer (d) LDR
  24. 24.True or false: a transistor has coloured bands. (a) False (b) True
  25. 25.🧩 Which component boosts a small signal? (a) motor (b) transistor (c) fuse (d) buzzer
  26. 26.🧩 A capacitor in a circuit can … (a) spin a wheel (b) store charge briefly (c) measure heat (d) make light
  27. 27.What does a motor do? (a) turns a fan or wheels (b) makes a beeping sound (c) has coloured bands (d) is a resistance knob
  28. 28.True or false: a capacitor stores a little charge. (a) False (b) True
  29. 29.True or false: a fuse blows if current is high. (a) True (b) False
  30. 30.What does a fuse do? (a) stores a little charge (b) makes a beeping sound (c) blows if current is high (d) is a resistance knob
  31. 31.What does a buzzer do? (a) senses how hot it is (b) limits the current (c) is a resistance knob (d) makes a beeping sound
  32. 32.True or false: a diode stores a little charge. (a) False (b) True
  33. 33.🧩 Which component blows if current is high? (a) LDR (b) transistor (c) buzzer (d) fuse
  34. 34.What does a capacitor do? (a) glows using little power (b) lets current go one way (c) turns a fan or wheels (d) stores a little charge
  35. 35.True or false: a buzzer makes a beeping sound. (a) True (b) False
  36. 36.True or false: a resistor is a resistance knob. (a) False (b) True
  37. 37.True or false: an LED makes a beeping sound. (a) True (b) False
  38. 38.What does an LDR do? (a) boosts a small signal (b) senses how bright it is (c) limits the current (d) lets current go one way
  39. 39.True or false: an LDR has coloured bands. (a) False (b) True
  40. 40.True or false: a resistor limits the current. (a) False (b) True

Answer key

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

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