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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 550 · 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 stores a little charge? (a) capacitor (b) buzzer (c) LED (d) resistor
  2. 2.What does a thermistor do? (a) senses how hot it is (b) limits the current (c) glows using little power (d) turns a fan or wheels
  3. 3.What does a capacitor do? (a) stores a little charge (b) senses how bright it is (c) boosts a small signal (d) senses how hot it is
  4. 4.What does a transistor do? (a) is a resistance knob (b) blows if current is high (c) boosts a small signal (d) has coloured bands
  5. 5.True or false: a transistor turns a fan or wheels. (a) True (b) False
  6. 6.True or false: an LDR beeps for an alarm. (a) True (b) False
  7. 7.What does a motor do? (a) lets current go one way (b) stores a little charge (c) has coloured bands (d) turns a fan or wheels
  8. 8.What does a resistor do? (a) has coloured bands (b) turns a fan or wheels (c) stores a little charge (d) senses how hot it is
  9. 9.True or false: a capacitor smooths a wobbly supply. (a) True (b) False
  10. 10.🧩 Which component blows if current is high? (a) fuse (b) buzzer (c) LED (d) transistor
  11. 11.🧩 A capacitor in a circuit can … (a) make light (b) measure heat (c) spin a wheel (d) store charge briefly
  12. 12.True or false: a transistor senses how bright it is. (a) True (b) False
  13. 13.True or false: a buzzer has coloured bands. (a) True (b) False
  14. 14.True or false: a diode makes things spin. (a) False (b) True
  15. 15.True or false: a buzzer smooths a wobbly supply. (a) True (b) False
  16. 16.🧩 Which part changes electrical energy into sound? (a) a diode (b) a capacitor (c) a buzzer (d) a resistor
  17. 17.True or false: an LDR blows if current is high. (a) True (b) False
  18. 18.🧩 Which component smooths a wobbly supply? (a) capacitor (b) diode (c) potentiometer (d) thermistor
  19. 19.🧩 Which part changes electrical energy into movement? (a) a resistor (b) an LED (c) a fuse (d) a motor
  20. 20.True or false: a resistor smooths a wobbly supply. (a) False (b) True
  21. 21.What does an LED do? (a) has coloured bands (b) makes a beeping sound (c) is a resistance knob (d) glows using little power
  22. 22.True or false: a resistor limits the current. (a) False (b) True
  23. 23.🧩 Which component limits the current? (a) resistor (b) thermistor (c) buzzer (d) fuse
  24. 24.What does a fuse do? (a) limits the current (b) senses how hot it is (c) beeps for an alarm (d) blows if current is high
  25. 25.What does a motor do? (a) senses how bright it is (b) makes things spin (c) has coloured bands (d) senses how hot it is
  26. 26.🧩 Which component senses how hot it is? (a) potentiometer (b) thermistor (c) buzzer (d) motor
  27. 27.🧩 Which component makes a beeping sound? (a) potentiometer (b) buzzer (c) LDR (d) fuse
  28. 28.True or false: a capacitor blows if current is high. (a) True (b) False
  29. 29.What does a diode do? (a) lets current go one way (b) glows using little power (c) is a resistance knob (d) limits the current
  30. 30.True or false: an LDR glows using little power. (a) True (b) False
  31. 31.What does a resistor do? (a) makes a beeping sound (b) is a resistance knob (c) boosts a small signal (d) limits the current
  32. 32.What does a capacitor do? (a) has coloured bands (b) limits the current (c) smooths a wobbly supply (d) senses how bright it is
  33. 33.🧩 Which component glows using little power? (a) diode (b) resistor (c) LDR (d) LED
  34. 34.True or false: a diode boosts a small signal. (a) True (b) False
  35. 35.True or false: a thermistor limits the current. (a) True (b) False
  36. 36.🧩 Which component boosts a small signal? (a) fuse (b) potentiometer (c) transistor (d) diode
  37. 37.True or false: a capacitor glows using little power. (a) False (b) True
  38. 38.What does a buzzer do? (a) has coloured bands (b) senses how hot it is (c) stores a little charge (d) makes a beeping sound
  39. 39.🧩 Which component has coloured bands? (a) thermistor (b) diode (c) capacitor (d) resistor
  40. 40.True or false: an LED glows using little power. (a) True (b) False

Answer key

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

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