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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 641 · 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: an LED glows using little power. (a) False (b) True
  2. 2.What does a resistor do? (a) senses how bright it is (b) makes a beeping sound (c) has coloured bands (d) makes things spin
  3. 3.🧩 Which component lets current go one way? (a) motor (b) capacitor (c) LED (d) diode
  4. 4.🧩 Which component boosts a small signal? (a) fuse (b) motor (c) potentiometer (d) transistor
  5. 5.🧩 Which component senses how hot it is? (a) thermistor (b) potentiometer (c) motor (d) buzzer
  6. 6.🧩 Which component smooths a wobbly supply? (a) resistor (b) buzzer (c) diode (d) capacitor
  7. 7.🧩 Which part changes electrical energy into sound? (a) a diode (b) a buzzer (c) a capacitor (d) a resistor
  8. 8.🧩 Which component beeps for an alarm? (a) buzzer (b) resistor (c) transistor (d) motor
  9. 9.What does a thermistor do? (a) turns a fan or wheels (b) stores a little charge (c) senses how hot it is (d) beeps for an alarm
  10. 10.What does a capacitor do? (a) senses how bright it is (b) beeps for an alarm (c) stores a little charge (d) limits the current
  11. 11.🧩 Which component is a resistance knob? (a) potentiometer (b) LDR (c) buzzer (d) resistor
  12. 12.True or false: a thermistor boosts a small signal. (a) True (b) False
  13. 13.🧩 Which component makes things spin? (a) capacitor (b) resistor (c) LED (d) motor
  14. 14.True or false: a capacitor senses how hot it is. (a) True (b) False
  15. 15.🧩 Which part changes electrical energy into movement? (a) a fuse (b) a resistor (c) an LED (d) a motor
  16. 16.🧩 Which component makes a beeping sound? (a) thermistor (b) fuse (c) LED (d) buzzer
  17. 17.True or false: a resistor glows using little power. (a) False (b) True
  18. 18.True or false: a thermistor smooths a wobbly supply. (a) True (b) False
  19. 19.🧩 Which component turns a fan or wheels? (a) resistor (b) LDR (c) potentiometer (d) motor
  20. 20.What does a buzzer do? (a) blows if current is high (b) senses how hot it is (c) has coloured bands (d) beeps for an alarm
  21. 21.True or false: a capacitor stores a little charge. (a) False (b) True
  22. 22.🧩 Which component has coloured bands? (a) fuse (b) potentiometer (c) resistor (d) thermistor
  23. 23.🧩 A capacitor in a circuit can … (a) store charge briefly (b) spin a wheel (c) make light (d) measure heat
  24. 24.True or false: a fuse blows if current is high. (a) True (b) False
  25. 25.🧩 Which component limits the current? (a) potentiometer (b) LED (c) motor (d) resistor
  26. 26.True or false: an LDR senses how bright it is. (a) False (b) True
  27. 27.What does a transistor do? (a) stores a little charge (b) turns a fan or wheels (c) smooths a wobbly supply (d) boosts a small signal
  28. 28.True or false: a motor turns a fan or wheels. (a) False (b) True
  29. 29.True or false: a buzzer senses how hot it is. (a) False (b) True
  30. 30.True or false: a resistor turns a fan or wheels. (a) True (b) False
  31. 31.What does a resistor do? (a) boosts a small signal (b) lets current go one way (c) senses how bright it is (d) limits the current
  32. 32.What does a fuse do? (a) makes a beeping sound (b) blows if current is high (c) is a resistance knob (d) senses how bright it is
  33. 33.🧩 Which component stores a little charge? (a) motor (b) capacitor (c) buzzer (d) fuse
  34. 34.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
  35. 35.True or false: an LED has coloured bands. (a) True (b) False
  36. 36.🧩 Which component glows using little power? (a) transistor (b) capacitor (c) LED (d) resistor
  37. 37.True or false: a diode has coloured bands. (a) False (b) True
  38. 38.True or false: an LDR glows using little power. (a) True (b) False
  39. 39.True or false: a capacitor glows using little power. (a) False (b) True
  40. 40.True or false: a buzzer beeps for an alarm. (a) True (b) False

Answer key

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

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