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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 35 · 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.

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

Answer key

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

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