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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 405 · 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 capacitor do? (a) beeps for an alarm (b) blows if current is high (c) stores a little charge (d) limits the current
  2. 2.🧩 A capacitor in a circuit can … (a) make light (b) spin a wheel (c) store charge briefly (d) measure heat
  3. 3.🧩 Which component makes a beeping sound? (a) potentiometer (b) LED (c) resistor (d) buzzer
  4. 4.🧩 Which component glows using little power? (a) LED (b) diode (c) fuse (d) capacitor
  5. 5.🧩 Which part changes electrical energy into sound? (a) a diode (b) a resistor (c) a capacitor (d) a buzzer
  6. 6.What does an LED do? (a) glows using little power (b) makes a beeping sound (c) senses how hot it is (d) smooths a wobbly supply
  7. 7.🧩 Which component turns a fan or wheels? (a) potentiometer (b) motor (c) capacitor (d) LDR
  8. 8.🧩 Which component lets current go one way? (a) capacitor (b) transistor (c) fuse (d) diode
  9. 9.True or false: a motor turns a fan or wheels. (a) False (b) True
  10. 10.True or false: a resistor has coloured bands. (a) False (b) True
  11. 11.What does a transistor do? (a) makes a beeping sound (b) boosts a small signal (c) has coloured bands (d) beeps for an alarm
  12. 12.What does a buzzer do? (a) limits the current (b) beeps for an alarm (c) is a resistance knob (d) makes things spin
  13. 13.What does a resistor do? (a) has coloured bands (b) lets current go one way (c) blows if current is high (d) beeps for an alarm
  14. 14.True or false: a resistor stores a little charge. (a) False (b) True
  15. 15.True or false: a potentiometer is a resistance knob. (a) True (b) False
  16. 16.🧩 Which component smooths a wobbly supply? (a) motor (b) thermistor (c) capacitor (d) potentiometer
  17. 17.What does a diode do? (a) has coloured bands (b) lets current go one way (c) stores a little charge (d) makes things spin
  18. 18.True or false: a resistor glows using little power. (a) True (b) False
  19. 19.🧩 Which component senses how hot it is? (a) LDR (b) buzzer (c) motor (d) thermistor
  20. 20.What does a potentiometer do? (a) makes things spin (b) has coloured bands (c) is a resistance knob (d) beeps for an alarm
  21. 21.🧩 Which part changes electrical energy into movement? (a) a fuse (b) a motor (c) a resistor (d) an LED
  22. 22.What does a motor do? (a) has coloured bands (b) makes things spin (c) glows using little power (d) beeps for an alarm
  23. 23.True or false: a fuse blows if current is high. (a) False (b) True
  24. 24.🧩 Which component beeps for an alarm? (a) LDR (b) potentiometer (c) thermistor (d) buzzer
  25. 25.True or false: an LED senses how bright it is. (a) False (b) True
  26. 26.What does a buzzer do? (a) glows using little power (b) makes things spin (c) makes a beeping sound (d) lets current go one way
  27. 27.🧩 Which component makes things spin? (a) motor (b) fuse (c) thermistor (d) diode
  28. 28.True or false: an LDR is a resistance knob. (a) False (b) True
  29. 29.True or false: a diode senses how bright it is. (a) False (b) True
  30. 30.What does a resistor do? (a) limits the current (b) makes a beeping sound (c) smooths a wobbly supply (d) glows using little power
  31. 31.What does a fuse do? (a) has coloured bands (b) blows if current is high (c) makes things spin (d) limits the current
  32. 32.True or false: a motor makes things spin. (a) False (b) True
  33. 33.🧩 Which component boosts a small signal? (a) buzzer (b) capacitor (c) diode (d) transistor
  34. 34.True or false: a capacitor stores a little charge. (a) True (b) False
  35. 35.True or false: a potentiometer smooths a wobbly supply. (a) True (b) False
  36. 36.What does a capacitor do? (a) senses how bright it is (b) smooths a wobbly supply (c) glows using little power (d) lets current go one way
  37. 37.True or false: a diode smooths a wobbly supply. (a) False (b) True
  38. 38.True or false: a buzzer makes a beeping sound. (a) False (b) True
  39. 39.🧩 Which component limits the current? (a) thermistor (b) buzzer (c) resistor (d) LDR
  40. 40.True or false: a buzzer has coloured bands. (a) True (b) False

Answer key

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

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