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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 128 · 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.What does a potentiometer do? (a) lets current go one way (b) is a resistance knob (c) senses how hot it is (d) stores a little charge
  2. 2.What does a buzzer do? (a) glows using little power (b) blows if current is high (c) limits the current (d) makes a beeping sound
  3. 3.🧩 Which component blows if current is high? (a) fuse (b) resistor (c) thermistor (d) diode
  4. 4.True or false: a capacitor senses how hot it is. (a) True (b) False
  5. 5.🧩 Which component smooths a wobbly supply? (a) diode (b) buzzer (c) capacitor (d) LED
  6. 6.🧩 A capacitor in a circuit can … (a) store charge briefly (b) make light (c) spin a wheel (d) measure heat
  7. 7.What does a motor do? (a) limits the current (b) turns a fan or wheels (c) makes a beeping sound (d) glows using little power
  8. 8.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a diode (c) a capacitor (d) a buzzer
  9. 9.What does a motor do? (a) makes a beeping sound (b) has coloured bands (c) glows using little power (d) makes things spin
  10. 10.What does an LDR do? (a) stores a little charge (b) blows if current is high (c) senses how bright it is (d) boosts a small signal
  11. 11.🧩 Which component glows using little power? (a) LED (b) buzzer (c) diode (d) potentiometer
  12. 12.What does a capacitor do? (a) lets current go one way (b) makes a beeping sound (c) senses how bright it is (d) smooths a wobbly supply
  13. 13.True or false: a capacitor limits the current. (a) True (b) False
  14. 14.🧩 Which component makes a beeping sound? (a) buzzer (b) transistor (c) capacitor (d) fuse
  15. 15.True or false: a motor stores a little charge. (a) True (b) False
  16. 16.True or false: an LED beeps for an alarm. (a) False (b) True
  17. 17.🧩 Which part changes electrical energy into movement? (a) a motor (b) a resistor (c) a fuse (d) an LED
  18. 18.🧩 Which component makes things spin? (a) capacitor (b) fuse (c) motor (d) transistor
  19. 19.True or false: a fuse blows if current is high. (a) True (b) False
  20. 20.What does a resistor do? (a) senses how bright it is (b) beeps for an alarm (c) limits the current (d) turns a fan or wheels
  21. 21.🧩 Which component senses how bright it is? (a) transistor (b) thermistor (c) capacitor (d) LDR
  22. 22.🧩 Which component turns a fan or wheels? (a) resistor (b) capacitor (c) thermistor (d) motor
  23. 23.True or false: an LED glows using little power. (a) True (b) False
  24. 24.True or false: a fuse senses how hot it is. (a) True (b) False
  25. 25.🧩 Which component limits the current? (a) LDR (b) transistor (c) thermistor (d) resistor
  26. 26.True or false: a thermistor senses how hot it is. (a) True (b) False
  27. 27.True or false: a buzzer smooths a wobbly supply. (a) False (b) True
  28. 28.True or false: a capacitor stores a little charge. (a) False (b) True
  29. 29.What does a fuse do? (a) senses how hot it is (b) blows if current is high (c) has coloured bands (d) smooths a wobbly supply
  30. 30.🧩 Which component senses how hot it is? (a) buzzer (b) LED (c) resistor (d) thermistor
  31. 31.True or false: a fuse makes a beeping sound. (a) False (b) True
  32. 32.True or false: a motor makes things spin. (a) False (b) True
  33. 33.🧩 Which component is a resistance knob? (a) capacitor (b) LDR (c) potentiometer (d) diode
  34. 34.True or false: an LED stores a little charge. (a) False (b) True
  35. 35.True or false: a fuse lets current go one way. (a) False (b) True
  36. 36.True or false: a diode boosts a small signal. (a) True (b) False
  37. 37.True or false: a potentiometer stores a little charge. (a) True (b) False
  38. 38.🧩 Which component beeps for an alarm? (a) thermistor (b) motor (c) buzzer (d) capacitor
  39. 39.🧩 Which component stores a little charge? (a) capacitor (b) LED (c) diode (d) motor
  40. 40.True or false: a thermistor makes a beeping sound. (a) False (b) True

Answer key

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

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