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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 384 · 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.True or false: a fuse boosts a small signal. (a) False (b) True
  2. 2.What does a fuse do? (a) blows if current is high (b) has coloured bands (c) limits the current (d) lets current go one way
  3. 3.🧩 A capacitor in a circuit can … (a) store charge briefly (b) measure heat (c) spin a wheel (d) make light
  4. 4.What does a motor do? (a) senses how bright it is (b) stores a little charge (c) turns a fan or wheels (d) beeps for an alarm
  5. 5.🧩 Which part changes electrical energy into movement? (a) a resistor (b) a fuse (c) a motor (d) an LED
  6. 6.True or false: a capacitor smooths a wobbly supply. (a) True (b) False
  7. 7.What does a capacitor do? (a) has coloured bands (b) limits the current (c) lets current go one way (d) stores a little charge
  8. 8.True or false: a potentiometer stores a little charge. (a) False (b) True
  9. 9.🧩 Which component beeps for an alarm? (a) LDR (b) buzzer (c) diode (d) thermistor
  10. 10.True or false: a resistor limits the current. (a) False (b) True
  11. 11.What does a buzzer do? (a) makes a beeping sound (b) boosts a small signal (c) glows using little power (d) senses how hot it is
  12. 12.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a capacitor (c) a buzzer (d) a diode
  13. 13.True or false: a transistor boosts a small signal. (a) True (b) False
  14. 14.What does a diode do? (a) senses how bright it is (b) limits the current (c) turns a fan or wheels (d) lets current go one way
  15. 15.What does a resistor do? (a) turns a fan or wheels (b) blows if current is high (c) is a resistance knob (d) limits the current
  16. 16.🧩 Which component glows using little power? (a) motor (b) thermistor (c) LED (d) transistor
  17. 17.What does a resistor do? (a) glows using little power (b) is a resistance knob (c) has coloured bands (d) makes things spin
  18. 18.🧩 Which component turns a fan or wheels? (a) diode (b) capacitor (c) motor (d) LED
  19. 19.True or false: a buzzer has coloured bands. (a) False (b) True
  20. 20.True or false: a buzzer makes a beeping sound. (a) False (b) True
  21. 21.🧩 Which component limits the current? (a) potentiometer (b) motor (c) resistor (d) LDR
  22. 22.True or false: an LED glows using little power. (a) False (b) True
  23. 23.True or false: a buzzer blows if current is high. (a) True (b) False
  24. 24.What does a thermistor do? (a) boosts a small signal (b) makes things spin (c) senses how bright it is (d) senses how hot it is
  25. 25.What does a transistor do? (a) is a resistance knob (b) makes things spin (c) glows using little power (d) boosts a small signal
  26. 26.🧩 Which component senses how bright it is? (a) fuse (b) LDR (c) resistor (d) transistor
  27. 27.🧩 Which component has coloured bands? (a) transistor (b) resistor (c) diode (d) LED
  28. 28.What does a potentiometer do? (a) blows if current is high (b) senses how bright it is (c) is a resistance knob (d) stores a little charge
  29. 29.True or false: a potentiometer has coloured bands. (a) True (b) False
  30. 30.What does an LED do? (a) glows using little power (b) beeps for an alarm (c) turns a fan or wheels (d) senses how hot it is
  31. 31.True or false: a motor turns a fan or wheels. (a) False (b) True
  32. 32.🧩 Which component makes things spin? (a) buzzer (b) motor (c) capacitor (d) LED
  33. 33.🧩 Which component boosts a small signal? (a) transistor (b) buzzer (c) thermistor (d) capacitor
  34. 34.True or false: a motor makes things spin. (a) False (b) True
  35. 35.True or false: a transistor turns a fan or wheels. (a) False (b) True
  36. 36.🧩 Which component makes a beeping sound? (a) resistor (b) fuse (c) potentiometer (d) buzzer
  37. 37.True or false: a buzzer senses how hot it is. (a) True (b) False
  38. 38.True or false: a buzzer beeps for an alarm. (a) False (b) True
  39. 39.🧩 Which component smooths a wobbly supply? (a) LDR (b) buzzer (c) fuse (d) capacitor
  40. 40.True or false: a buzzer limits the current. (a) False (b) True

Answer key

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

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