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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 468 · 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 an LED do? (a) senses how hot it is (b) glows using little power (c) has coloured bands (d) lets current go one way
  2. 2.🧩 Which component blows if current is high? (a) LDR (b) resistor (c) fuse (d) capacitor
  3. 3.What does a motor do? (a) makes things spin (b) makes a beeping sound (c) stores a little charge (d) lets current go one way
  4. 4.True or false: a capacitor lets current go one way. (a) False (b) True
  5. 5.🧩 Which component beeps for an alarm? (a) buzzer (b) transistor (c) LDR (d) LED
  6. 6.True or false: a transistor is a resistance knob. (a) True (b) False
  7. 7.True or false: a fuse blows if current is high. (a) False (b) True
  8. 8.What does a capacitor do? (a) smooths a wobbly supply (b) blows if current is high (c) is a resistance knob (d) lets current go one way
  9. 9.What does a buzzer do? (a) senses how bright it is (b) limits the current (c) makes a beeping sound (d) lets current go one way
  10. 10.🧩 Which component is a resistance knob? (a) buzzer (b) motor (c) potentiometer (d) fuse
  11. 11.True or false: an LED glows using little power. (a) True (b) False
  12. 12.What does a potentiometer do? (a) is a resistance knob (b) senses how bright it is (c) turns a fan or wheels (d) smooths a wobbly supply
  13. 13.🧩 A capacitor in a circuit can … (a) spin a wheel (b) make light (c) measure heat (d) store charge briefly
  14. 14.🧩 Which component limits the current? (a) thermistor (b) capacitor (c) transistor (d) resistor
  15. 15.🧩 Which component smooths a wobbly supply? (a) capacitor (b) diode (c) resistor (d) fuse
  16. 16.🧩 Which component has coloured bands? (a) fuse (b) transistor (c) resistor (d) capacitor
  17. 17.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a capacitor (c) a buzzer (d) a diode
  18. 18.True or false: an LED beeps for an alarm. (a) False (b) True
  19. 19.🧩 Which part changes electrical energy into movement? (a) a fuse (b) an LED (c) a motor (d) a resistor
  20. 20.🧩 Which component makes a beeping sound? (a) resistor (b) potentiometer (c) buzzer (d) LED
  21. 21.True or false: an LDR lets current go one way. (a) False (b) True
  22. 22.True or false: an LDR limits the current. (a) False (b) True
  23. 23.🧩 Which component turns a fan or wheels? (a) capacitor (b) motor (c) buzzer (d) potentiometer
  24. 24.🧩 Which component lets current go one way? (a) potentiometer (b) capacitor (c) thermistor (d) diode
  25. 25.🧩 Which component makes things spin? (a) capacitor (b) motor (c) buzzer (d) LED
  26. 26.🧩 Which component stores a little charge? (a) transistor (b) capacitor (c) potentiometer (d) motor
  27. 27.What does an LDR do? (a) is a resistance knob (b) has coloured bands (c) limits the current (d) senses how bright it is
  28. 28.True or false: a thermistor has coloured bands. (a) True (b) False
  29. 29.What does a resistor do? (a) has coloured bands (b) boosts a small signal (c) makes things spin (d) senses how bright it is
  30. 30.What does a resistor do? (a) stores a little charge (b) limits the current (c) senses how bright it is (d) beeps for an alarm
  31. 31.True or false: a buzzer limits the current. (a) False (b) True
  32. 32.True or false: a thermistor limits the current. (a) False (b) True
  33. 33.True or false: a buzzer beeps for an alarm. (a) False (b) True
  34. 34.True or false: a resistor beeps for an alarm. (a) True (b) False
  35. 35.What does a transistor do? (a) senses how hot it is (b) stores a little charge (c) boosts a small signal (d) beeps for an alarm
  36. 36.🧩 Which component boosts a small signal? (a) resistor (b) potentiometer (c) transistor (d) capacitor
  37. 37.True or false: an LDR turns a fan or wheels. (a) True (b) False
  38. 38.🧩 Which component glows using little power? (a) LED (b) fuse (c) resistor (d) buzzer
  39. 39.What does a fuse do? (a) has coloured bands (b) blows if current is high (c) makes a beeping sound (d) turns a fan or wheels
  40. 40.True or false: a diode lets current go one way. (a) True (b) False

Answer key

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

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