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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 204 · 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 an LDR do? (a) senses how hot it is (b) has coloured bands (c) boosts a small signal (d) senses how bright it is
  2. 2.🧩 Which component beeps for an alarm? (a) buzzer (b) potentiometer (c) transistor (d) LED
  3. 3.🧩 A capacitor in a circuit can … (a) make light (b) measure heat (c) spin a wheel (d) store charge briefly
  4. 4.What does a resistor do? (a) turns a fan or wheels (b) stores a little charge (c) makes a beeping sound (d) limits the current
  5. 5.🧩 Which component senses how hot it is? (a) resistor (b) transistor (c) thermistor (d) capacitor
  6. 6.🧩 Which part changes electrical energy into sound? (a) a diode (b) a resistor (c) a buzzer (d) a capacitor
  7. 7.🧩 Which component smooths a wobbly supply? (a) buzzer (b) resistor (c) fuse (d) capacitor
  8. 8.True or false: an LED glows using little power. (a) True (b) False
  9. 9.True or false: an LED makes a beeping sound. (a) False (b) True
  10. 10.🧩 Which component is a resistance knob? (a) LED (b) motor (c) potentiometer (d) resistor
  11. 11.True or false: a thermistor turns a fan or wheels. (a) True (b) False
  12. 12.🧩 Which part changes electrical energy into movement? (a) a motor (b) an LED (c) a resistor (d) a fuse
  13. 13.🧩 Which component blows if current is high? (a) fuse (b) LDR (c) thermistor (d) capacitor
  14. 14.What does an LED do? (a) turns a fan or wheels (b) makes a beeping sound (c) glows using little power (d) beeps for an alarm
  15. 15.🧩 Which component turns a fan or wheels? (a) resistor (b) capacitor (c) motor (d) potentiometer
  16. 16.True or false: a resistor senses how bright it is. (a) False (b) True
  17. 17.What does a fuse do? (a) blows if current is high (b) limits the current (c) stores a little charge (d) lets current go one way
  18. 18.🧩 Which component limits the current? (a) resistor (b) LED (c) potentiometer (d) capacitor
  19. 19.🧩 Which component makes a beeping sound? (a) diode (b) resistor (c) buzzer (d) motor
  20. 20.🧩 Which component glows using little power? (a) diode (b) capacitor (c) thermistor (d) LED
  21. 21.What does a buzzer do? (a) beeps for an alarm (b) limits the current (c) smooths a wobbly supply (d) makes things spin
  22. 22.What does a diode do? (a) blows if current is high (b) senses how hot it is (c) smooths a wobbly supply (d) lets current go one way
  23. 23.True or false: a diode smooths a wobbly supply. (a) False (b) True
  24. 24.True or false: an LDR boosts a small signal. (a) False (b) True
  25. 25.True or false: a potentiometer senses how bright it is. (a) True (b) False
  26. 26.What does a motor do? (a) turns a fan or wheels (b) stores a little charge (c) boosts a small signal (d) makes a beeping sound
  27. 27.True or false: a fuse makes a beeping sound. (a) False (b) True
  28. 28.True or false: an LDR senses how bright it is. (a) False (b) True
  29. 29.🧩 Which component boosts a small signal? (a) transistor (b) potentiometer (c) motor (d) buzzer
  30. 30.What does a transistor do? (a) has coloured bands (b) smooths a wobbly supply (c) boosts a small signal (d) makes things spin
  31. 31.What does a capacitor do? (a) limits the current (b) senses how hot it is (c) senses how bright it is (d) stores a little charge
  32. 32.True or false: a transistor senses how bright it is. (a) False (b) True
  33. 33.What does a resistor do? (a) makes things spin (b) senses how bright it is (c) has coloured bands (d) is a resistance knob
  34. 34.🧩 Which component has coloured bands? (a) transistor (b) fuse (c) resistor (d) capacitor
  35. 35.True or false: an LED lets current go one way. (a) False (b) True
  36. 36.What does a thermistor do? (a) is a resistance knob (b) senses how hot it is (c) lets current go one way (d) stores a little charge
  37. 37.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
  38. 38.True or false: a buzzer smooths a wobbly supply. (a) False (b) True
  39. 39.True or false: a transistor senses how hot it is. (a) False (b) True
  40. 40.True or false: a resistor has coloured bands. (a) False (b) True

Answer key

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

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