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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 447 · 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: an LDR senses how bright it is. (a) False (b) True
  2. 2.True or false: a thermistor senses how hot it is. (a) False (b) True
  3. 3.🧩 Which component limits the current? (a) thermistor (b) diode (c) resistor (d) transistor
  4. 4.🧩 Which part changes electrical energy into movement? (a) a motor (b) a resistor (c) an LED (d) a fuse
  5. 5.What does a capacitor do? (a) stores a little charge (b) has coloured bands (c) beeps for an alarm (d) limits the current
  6. 6.True or false: a potentiometer blows if current is high. (a) False (b) True
  7. 7.What does a resistor do? (a) senses how bright it is (b) blows if current is high (c) limits the current (d) stores a little charge
  8. 8.What does a fuse do? (a) makes a beeping sound (b) blows if current is high (c) senses how hot it is (d) lets current go one way
  9. 9.True or false: a diode senses how hot it is. (a) False (b) True
  10. 10.What does an LDR do? (a) boosts a small signal (b) blows if current is high (c) senses how bright it is (d) makes things spin
  11. 11.🧩 Which component beeps for an alarm? (a) fuse (b) buzzer (c) diode (d) capacitor
  12. 12.🧩 Which component glows using little power? (a) resistor (b) diode (c) potentiometer (d) LED
  13. 13.🧩 Which component smooths a wobbly supply? (a) capacitor (b) diode (c) LED (d) LDR
  14. 14.True or false: a diode turns a fan or wheels. (a) True (b) False
  15. 15.True or false: a capacitor beeps for an alarm. (a) False (b) True
  16. 16.True or false: a potentiometer is a resistance knob. (a) False (b) True
  17. 17.True or false: an LDR smooths a wobbly supply. (a) False (b) True
  18. 18.🧩 A capacitor in a circuit can … (a) make light (b) measure heat (c) store charge briefly (d) spin a wheel
  19. 19.What does a buzzer do? (a) makes a beeping sound (b) lets current go one way (c) makes things spin (d) stores a little charge
  20. 20.True or false: a transistor makes things spin. (a) True (b) False
  21. 21.🧩 Which part changes electrical energy into sound? (a) a diode (b) a buzzer (c) a resistor (d) a capacitor
  22. 22.What does a diode do? (a) stores a little charge (b) boosts a small signal (c) smooths a wobbly supply (d) lets current go one way
  23. 23.🧩 Which component makes things spin? (a) thermistor (b) resistor (c) fuse (d) motor
  24. 24.What does a buzzer do? (a) senses how hot it is (b) has coloured bands (c) boosts a small signal (d) beeps for an alarm
  25. 25.🧩 Which component has coloured bands? (a) fuse (b) potentiometer (c) resistor (d) motor
  26. 26.🧩 Which component senses how bright it is? (a) motor (b) LDR (c) capacitor (d) buzzer
  27. 27.What does a potentiometer do? (a) glows using little power (b) lets current go one way (c) is a resistance knob (d) boosts a small signal
  28. 28.True or false: a capacitor glows using little power. (a) False (b) True
  29. 29.True or false: an LED lets current go one way. (a) False (b) True
  30. 30.True or false: an LED stores a little charge. (a) True (b) False
  31. 31.🧩 Which component stores a little charge? (a) diode (b) thermistor (c) capacitor (d) fuse
  32. 32.True or false: a fuse blows if current is high. (a) False (b) True
  33. 33.🧩 Which component is a resistance knob? (a) LED (b) diode (c) capacitor (d) potentiometer
  34. 34.True or false: a buzzer makes a beeping sound. (a) True (b) False
  35. 35.True or false: a diode blows if current is high. (a) True (b) False
  36. 36.What does a resistor do? (a) smooths a wobbly supply (b) senses how hot it is (c) has coloured bands (d) turns a fan or wheels
  37. 37.🧩 Which component senses how hot it is? (a) buzzer (b) motor (c) resistor (d) thermistor
  38. 38.True or false: a potentiometer limits the current. (a) True (b) False
  39. 39.What does a thermistor do? (a) smooths a wobbly supply (b) senses how hot it is (c) blows if current is high (d) has coloured bands
  40. 40.True or false: a motor turns a fan or wheels. (a) False (b) True

Answer key

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

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