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Electronics Worksheet: Electronic Components

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

Answer key

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

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