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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 373 · 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 senses how bright it is? (a) diode (b) motor (c) thermistor (d) LDR
  2. 2.True or false: a potentiometer is a resistance knob. (a) False (b) True
  3. 3.What does a fuse do? (a) boosts a small signal (b) stores a little charge (c) is a resistance knob (d) blows if current is high
  4. 4.🧩 A capacitor in a circuit can … (a) measure heat (b) spin a wheel (c) make light (d) store charge briefly
  5. 5.🧩 Which component stores a little charge? (a) diode (b) LDR (c) capacitor (d) buzzer
  6. 6.True or false: a capacitor is a resistance knob. (a) True (b) False
  7. 7.🧩 Which component boosts a small signal? (a) potentiometer (b) LED (c) transistor (d) diode
  8. 8.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
  9. 9.What does a buzzer do? (a) turns a fan or wheels (b) limits the current (c) beeps for an alarm (d) stores a little charge
  10. 10.🧩 Which part changes electrical energy into movement? (a) an LED (b) a motor (c) a fuse (d) a resistor
  11. 11.True or false: a thermistor senses how hot it is. (a) False (b) True
  12. 12.What does a resistor do? (a) stores a little charge (b) limits the current (c) senses how hot it is (d) beeps for an alarm
  13. 13.🧩 Which component has coloured bands? (a) capacitor (b) thermistor (c) fuse (d) resistor
  14. 14.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a diode (c) a buzzer (d) a capacitor
  15. 15.True or false: an LED stores a little charge. (a) False (b) True
  16. 16.What does an LED do? (a) senses how bright it is (b) has coloured bands (c) blows if current is high (d) glows using little power
  17. 17.True or false: a resistor glows using little power. (a) True (b) False
  18. 18.What does a motor do? (a) lets current go one way (b) blows if current is high (c) turns a fan or wheels (d) stores a little charge
  19. 19.True or false: a diode boosts a small signal. (a) False (b) True
  20. 20.What does a diode do? (a) lets current go one way (b) beeps for an alarm (c) turns a fan or wheels (d) senses how hot it is
  21. 21.True or false: a thermistor makes a beeping sound. (a) True (b) False
  22. 22.🧩 Which component blows if current is high? (a) LDR (b) buzzer (c) fuse (d) transistor
  23. 23.🧩 Which component smooths a wobbly supply? (a) potentiometer (b) LDR (c) capacitor (d) LED
  24. 24.True or false: a potentiometer boosts a small signal. (a) False (b) True
  25. 25.🧩 Which component makes a beeping sound? (a) transistor (b) capacitor (c) fuse (d) buzzer
  26. 26.🧩 Which component makes things spin? (a) fuse (b) motor (c) diode (d) resistor
  27. 27.🧩 Which component is a resistance knob? (a) diode (b) potentiometer (c) LDR (d) thermistor
  28. 28.🧩 Which component beeps for an alarm? (a) thermistor (b) LED (c) buzzer (d) capacitor
  29. 29.True or false: an LDR beeps for an alarm. (a) False (b) True
  30. 30.True or false: a buzzer makes a beeping sound. (a) False (b) True
  31. 31.True or false: an LDR boosts a small signal. (a) False (b) True
  32. 32.True or false: a buzzer turns a fan or wheels. (a) True (b) False
  33. 33.🧩 Which component glows using little power? (a) buzzer (b) diode (c) potentiometer (d) LED
  34. 34.What does a transistor do? (a) turns a fan or wheels (b) boosts a small signal (c) glows using little power (d) makes things spin
  35. 35.🧩 Which component limits the current? (a) LED (b) diode (c) potentiometer (d) resistor
  36. 36.True or false: a buzzer smooths a wobbly supply. (a) True (b) False
  37. 37.True or false: a thermistor smooths a wobbly supply. (a) True (b) False
  38. 38.🧩 Which component lets current go one way? (a) resistor (b) diode (c) buzzer (d) transistor
  39. 39.True or false: an LED glows using little power. (a) False (b) True
  40. 40.🧩 Which component turns a fan or wheels? (a) resistor (b) potentiometer (c) motor (d) thermistor

Answer key

  1. LDR
  2. True
  3. blows if current is high
  4. store charge briefly
  5. capacitor
  6. False
  7. transistor
  8. True
  9. beeps for an alarm
  10. a motor
  11. True
  12. limits the current
  13. resistor
  14. a buzzer
  15. False
  16. glows using little power
  17. False
  18. turns a fan or wheels
  19. False
  20. lets current go one way
  21. False
  22. fuse
  23. capacitor
  24. False
  25. buzzer
  26. motor
  27. potentiometer
  28. buzzer
  29. False
  30. True
  31. False
  32. False
  33. LED
  34. boosts a small signal
  35. resistor
  36. False
  37. False
  38. diode
  39. True
  40. motor

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