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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 326 · 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) turns a fan or wheels (b) lets current go one way (c) beeps for an alarm (d) stores a little charge
  2. 2.🧩 Which part changes electrical energy into movement? (a) a fuse (b) an LED (c) a resistor (d) a motor
  3. 3.What does an LED do? (a) makes things spin (b) glows using little power (c) boosts a small signal (d) senses how hot it is
  4. 4.🧩 Which component makes a beeping sound? (a) motor (b) buzzer (c) diode (d) potentiometer
  5. 5.True or false: a resistor smooths a wobbly supply. (a) True (b) False
  6. 6.What does a potentiometer do? (a) senses how bright it is (b) is a resistance knob (c) makes a beeping sound (d) limits the current
  7. 7.True or false: a potentiometer makes things spin. (a) True (b) False
  8. 8.True or false: a potentiometer is a resistance knob. (a) False (b) True
  9. 9.🧩 Which component smooths a wobbly supply? (a) buzzer (b) LED (c) capacitor (d) potentiometer
  10. 10.What does an LDR do? (a) smooths a wobbly supply (b) turns a fan or wheels (c) senses how bright it is (d) is a resistance knob
  11. 11.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a buzzer (c) a diode (d) a capacitor
  12. 12.🧩 A capacitor in a circuit can … (a) spin a wheel (b) make light (c) measure heat (d) store charge briefly
  13. 13.What does a motor do? (a) senses how bright it is (b) turns a fan or wheels (c) blows if current is high (d) senses how hot it is
  14. 14.True or false: a fuse blows if current is high. (a) False (b) True
  15. 15.What does a fuse do? (a) stores a little charge (b) lets current go one way (c) boosts a small signal (d) blows if current is high
  16. 16.What does a motor do? (a) boosts a small signal (b) makes things spin (c) smooths a wobbly supply (d) senses how bright it is
  17. 17.What does a diode do? (a) lets current go one way (b) is a resistance knob (c) beeps for an alarm (d) blows if current is high
  18. 18.True or false: a transistor stores a little charge. (a) True (b) False
  19. 19.True or false: an LDR has coloured bands. (a) False (b) True
  20. 20.True or false: a thermistor senses how bright it is. (a) True (b) False
  21. 21.What does a capacitor do? (a) senses how hot it is (b) senses how bright it is (c) smooths a wobbly supply (d) turns a fan or wheels
  22. 22.🧩 Which component makes things spin? (a) transistor (b) LDR (c) motor (d) buzzer
  23. 23.True or false: a thermistor limits the current. (a) True (b) False
  24. 24.🧩 Which component has coloured bands? (a) fuse (b) potentiometer (c) resistor (d) buzzer
  25. 25.What does a thermistor do? (a) lets current go one way (b) beeps for an alarm (c) senses how hot it is (d) boosts a small signal
  26. 26.True or false: an LED glows using little power. (a) False (b) True
  27. 27.True or false: a thermistor senses how hot it is. (a) False (b) True
  28. 28.What does a resistor do? (a) makes a beeping sound (b) limits the current (c) turns a fan or wheels (d) stores a little charge
  29. 29.What does a buzzer do? (a) makes a beeping sound (b) turns a fan or wheels (c) makes things spin (d) senses how bright it is
  30. 30.What does a resistor do? (a) lets current go one way (b) is a resistance knob (c) has coloured bands (d) senses how hot it is
  31. 31.True or false: a diode glows using little power. (a) False (b) True
  32. 32.True or false: a fuse boosts a small signal. (a) True (b) False
  33. 33.🧩 Which component senses how bright it is? (a) LDR (b) capacitor (c) transistor (d) fuse
  34. 34.True or false: a motor turns a fan or wheels. (a) True (b) False
  35. 35.🧩 Which component senses how hot it is? (a) fuse (b) capacitor (c) diode (d) thermistor
  36. 36.🧩 Which component is a resistance knob? (a) LED (b) motor (c) fuse (d) potentiometer
  37. 37.True or false: a motor makes things spin. (a) True (b) False
  38. 38.True or false: a transistor boosts a small signal. (a) False (b) True
  39. 39.True or false: a capacitor makes a beeping sound. (a) True (b) False
  40. 40.🧩 Which component blows if current is high? (a) LED (b) fuse (c) buzzer (d) thermistor

Answer key

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

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