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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 653 · 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.🧩 A capacitor in a circuit can … (a) store charge briefly (b) make light (c) spin a wheel (d) measure heat
  2. 2.🧩 Which part changes electrical energy into movement? (a) an LED (b) a resistor (c) a fuse (d) a motor
  3. 3.What does a buzzer do? (a) glows using little power (b) blows if current is high (c) makes a beeping sound (d) makes things spin
  4. 4.What does a capacitor do? (a) limits the current (b) smooths a wobbly supply (c) beeps for an alarm (d) senses how bright it is
  5. 5.🧩 Which part changes electrical energy into sound? (a) a diode (b) a buzzer (c) a capacitor (d) a resistor
  6. 6.🧩 Which component blows if current is high? (a) fuse (b) resistor (c) LED (d) capacitor
  7. 7.🧩 Which component limits the current? (a) resistor (b) diode (c) motor (d) thermistor
  8. 8.True or false: a potentiometer makes things spin. (a) True (b) False
  9. 9.What does a capacitor do? (a) boosts a small signal (b) turns a fan or wheels (c) stores a little charge (d) has coloured bands
  10. 10.What does a fuse do? (a) glows using little power (b) blows if current is high (c) makes a beeping sound (d) limits the current
  11. 11.True or false: a potentiometer boosts a small signal. (a) True (b) False
  12. 12.True or false: a motor makes things spin. (a) False (b) True
  13. 13.🧩 Which component senses how bright it is? (a) buzzer (b) motor (c) capacitor (d) LDR
  14. 14.True or false: a buzzer makes a beeping sound. (a) False (b) True
  15. 15.What does an LDR do? (a) beeps for an alarm (b) glows using little power (c) senses how bright it is (d) has coloured bands
  16. 16.🧩 Which component senses how hot it is? (a) capacitor (b) LDR (c) thermistor (d) potentiometer
  17. 17.🧩 Which component is a resistance knob? (a) resistor (b) LED (c) potentiometer (d) transistor
  18. 18.🧩 Which component boosts a small signal? (a) resistor (b) transistor (c) buzzer (d) diode
  19. 19.🧩 Which component beeps for an alarm? (a) resistor (b) buzzer (c) LDR (d) potentiometer
  20. 20.True or false: a buzzer is a resistance knob. (a) False (b) True
  21. 21.🧩 Which component makes things spin? (a) resistor (b) potentiometer (c) motor (d) buzzer
  22. 22.True or false: a diode lets current go one way. (a) False (b) True
  23. 23.True or false: a motor boosts a small signal. (a) False (b) True
  24. 24.What does a diode do? (a) beeps for an alarm (b) turns a fan or wheels (c) glows using little power (d) lets current go one way
  25. 25.What does a buzzer do? (a) glows using little power (b) boosts a small signal (c) limits the current (d) beeps for an alarm
  26. 26.True or false: a thermistor limits the current. (a) True (b) False
  27. 27.🧩 Which component stores a little charge? (a) thermistor (b) transistor (c) motor (d) capacitor
  28. 28.What does a thermistor do? (a) glows using little power (b) has coloured bands (c) makes things spin (d) senses how hot it is
  29. 29.What does a transistor do? (a) boosts a small signal (b) senses how hot it is (c) has coloured bands (d) is a resistance knob
  30. 30.🧩 Which component glows using little power? (a) motor (b) LED (c) potentiometer (d) thermistor
  31. 31.True or false: an LED beeps for an alarm. (a) True (b) False
  32. 32.True or false: a resistor limits the current. (a) False (b) True
  33. 33.True or false: an LDR senses how bright it is. (a) True (b) False
  34. 34.What does a motor do? (a) makes things spin (b) beeps for an alarm (c) senses how bright it is (d) lets current go one way
  35. 35.🧩 Which component turns a fan or wheels? (a) capacitor (b) motor (c) potentiometer (d) resistor
  36. 36.🧩 Which component smooths a wobbly supply? (a) buzzer (b) diode (c) resistor (d) capacitor
  37. 37.🧩 Which component makes a beeping sound? (a) LDR (b) buzzer (c) thermistor (d) diode
  38. 38.True or false: a potentiometer senses how bright it is. (a) False (b) True
  39. 39.True or false: a transistor boosts a small signal. (a) True (b) False
  40. 40.What does a resistor do? (a) lets current go one way (b) boosts a small signal (c) makes a beeping sound (d) limits the current

Answer key

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

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