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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 578 · 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: a diode glows using little power. (a) True (b) False
  2. 2.🧩 Which component senses how bright it is? (a) LDR (b) motor (c) resistor (d) buzzer
  3. 3.🧩 Which component is a resistance knob? (a) LDR (b) buzzer (c) potentiometer (d) resistor
  4. 4.True or false: a diode smooths a wobbly supply. (a) False (b) True
  5. 5.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
  6. 6.🧩 A capacitor in a circuit can … (a) make light (b) store charge briefly (c) spin a wheel (d) measure heat
  7. 7.True or false: a motor turns a fan or wheels. (a) False (b) True
  8. 8.🧩 Which component turns a fan or wheels? (a) transistor (b) resistor (c) motor (d) thermistor
  9. 9.True or false: a diode lets current go one way. (a) False (b) True
  10. 10.What does a motor do? (a) beeps for an alarm (b) makes things spin (c) stores a little charge (d) senses how bright it is
  11. 11.True or false: a buzzer smooths a wobbly supply. (a) False (b) True
  12. 12.🧩 Which part changes electrical energy into sound? (a) a diode (b) a capacitor (c) a resistor (d) a buzzer
  13. 13.True or false: a buzzer beeps for an alarm. (a) False (b) True
  14. 14.🧩 Which component glows using little power? (a) fuse (b) diode (c) LED (d) LDR
  15. 15.True or false: a transistor limits the current. (a) True (b) False
  16. 16.What does a fuse do? (a) limits the current (b) blows if current is high (c) smooths a wobbly supply (d) senses how hot it is
  17. 17.True or false: a potentiometer stores a little charge. (a) True (b) False
  18. 18.True or false: an LED makes things spin. (a) False (b) True
  19. 19.🧩 Which component smooths a wobbly supply? (a) fuse (b) LDR (c) potentiometer (d) capacitor
  20. 20.🧩 Which component beeps for an alarm? (a) LED (b) resistor (c) potentiometer (d) buzzer
  21. 21.True or false: a fuse has coloured bands. (a) False (b) True
  22. 22.True or false: an LDR turns a fan or wheels. (a) True (b) False
  23. 23.What does a transistor do? (a) has coloured bands (b) boosts a small signal (c) stores a little charge (d) turns a fan or wheels
  24. 24.What does a capacitor do? (a) limits the current (b) is a resistance knob (c) blows if current is high (d) stores a little charge
  25. 25.True or false: an LDR limits the current. (a) True (b) False
  26. 26.🧩 Which component blows if current is high? (a) capacitor (b) diode (c) motor (d) fuse
  27. 27.True or false: a buzzer makes a beeping sound. (a) True (b) False
  28. 28.What does a motor do? (a) turns a fan or wheels (b) is a resistance knob (c) limits the current (d) senses how bright it is
  29. 29.True or false: a buzzer lets current go one way. (a) True (b) False
  30. 30.True or false: a potentiometer beeps for an alarm. (a) False (b) True
  31. 31.True or false: a transistor has coloured bands. (a) False (b) True
  32. 32.🧩 Which component stores a little charge? (a) LDR (b) capacitor (c) potentiometer (d) LED
  33. 33.True or false: a transistor blows if current is high. (a) False (b) True
  34. 34.What does a thermistor do? (a) lets current go one way (b) turns a fan or wheels (c) senses how hot it is (d) makes a beeping sound
  35. 35.🧩 Which part changes electrical energy into movement? (a) an LED (b) a fuse (c) a resistor (d) a motor
  36. 36.🧩 Which component has coloured bands? (a) LED (b) resistor (c) buzzer (d) thermistor
  37. 37.True or false: a fuse senses how hot it is. (a) False (b) True
  38. 38.🧩 Which component limits the current? (a) potentiometer (b) resistor (c) LDR (d) LED
  39. 39.🧩 Which component boosts a small signal? (a) LED (b) diode (c) transistor (d) potentiometer
  40. 40.What does a buzzer do? (a) makes a beeping sound (b) turns a fan or wheels (c) senses how bright it is (d) limits the current

Answer key

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

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