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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 702 · 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 buzzer do? (a) turns a fan or wheels (b) smooths a wobbly supply (c) beeps for an alarm (d) blows if current is high
  2. 2.What does a fuse do? (a) lets current go one way (b) limits the current (c) boosts a small signal (d) blows if current is high
  3. 3.What does a resistor do? (a) lets current go one way (b) smooths a wobbly supply (c) senses how bright it is (d) has coloured bands
  4. 4.What does a capacitor do? (a) limits the current (b) makes a beeping sound (c) smooths a wobbly supply (d) blows if current is high
  5. 5.True or false: an LED stores a little charge. (a) False (b) True
  6. 6.True or false: a potentiometer is a resistance knob. (a) False (b) True
  7. 7.🧩 Which component glows using little power? (a) motor (b) LED (c) fuse (d) transistor
  8. 8.True or false: a buzzer beeps for an alarm. (a) True (b) False
  9. 9.🧩 A capacitor in a circuit can … (a) make light (b) spin a wheel (c) store charge briefly (d) measure heat
  10. 10.True or false: a capacitor smooths a wobbly supply. (a) True (b) False
  11. 11.True or false: a potentiometer has coloured bands. (a) False (b) True
  12. 12.🧩 Which component turns a fan or wheels? (a) capacitor (b) fuse (c) buzzer (d) motor
  13. 13.🧩 Which component stores a little charge? (a) buzzer (b) fuse (c) LED (d) capacitor
  14. 14.🧩 Which component lets current go one way? (a) diode (b) resistor (c) transistor (d) LED
  15. 15.🧩 Which part changes electrical energy into movement? (a) a motor (b) a fuse (c) a resistor (d) an LED
  16. 16.🧩 Which part changes electrical energy into sound? (a) a diode (b) a capacitor (c) a buzzer (d) a resistor
  17. 17.True or false: a transistor smooths a wobbly supply. (a) True (b) False
  18. 18.What does a thermistor do? (a) senses how hot it is (b) limits the current (c) makes things spin (d) lets current go one way
  19. 19.True or false: a thermistor has coloured bands. (a) False (b) True
  20. 20.True or false: a thermistor limits the current. (a) True (b) False
  21. 21.True or false: a resistor has coloured bands. (a) True (b) False
  22. 22.🧩 Which component senses how hot it is? (a) thermistor (b) resistor (c) LDR (d) fuse
  23. 23.🧩 Which component limits the current? (a) transistor (b) capacitor (c) potentiometer (d) resistor
  24. 24.True or false: a transistor turns a fan or wheels. (a) True (b) False
  25. 25.True or false: an LDR boosts a small signal. (a) True (b) False
  26. 26.🧩 Which component beeps for an alarm? (a) potentiometer (b) resistor (c) thermistor (d) buzzer
  27. 27.🧩 Which component makes a beeping sound? (a) potentiometer (b) LDR (c) buzzer (d) capacitor
  28. 28.True or false: a capacitor makes things spin. (a) True (b) False
  29. 29.🧩 Which component senses how bright it is? (a) buzzer (b) transistor (c) resistor (d) LDR
  30. 30.True or false: an LED smooths a wobbly supply. (a) True (b) False
  31. 31.True or false: a potentiometer smooths a wobbly supply. (a) True (b) False
  32. 32.True or false: a transistor boosts a small signal. (a) False (b) True
  33. 33.True or false: a buzzer makes a beeping sound. (a) True (b) False
  34. 34.True or false: a resistor limits the current. (a) False (b) True
  35. 35.🧩 Which component has coloured bands? (a) buzzer (b) motor (c) resistor (d) LED
  36. 36.🧩 Which component smooths a wobbly supply? (a) capacitor (b) thermistor (c) resistor (d) buzzer
  37. 37.True or false: a fuse stores a little charge. (a) False (b) True
  38. 38.What does an LED do? (a) glows using little power (b) blows if current is high (c) lets current go one way (d) senses how bright it is
  39. 39.🧩 Which component boosts a small signal? (a) capacitor (b) potentiometer (c) buzzer (d) transistor
  40. 40.What does a diode do? (a) beeps for an alarm (b) senses how hot it is (c) lets current go one way (d) blows if current is high

Answer key

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

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