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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 111 · 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 LDR do? (a) senses how bright it is (b) senses how hot it is (c) is a resistance knob (d) blows if current is high
  2. 2.True or false: an LDR stores a little charge. (a) True (b) False
  3. 3.True or false: a diode lets current go one way. (a) False (b) True
  4. 4.🧩 Which component is a resistance knob? (a) thermistor (b) potentiometer (c) transistor (d) fuse
  5. 5.True or false: an LED stores a little charge. (a) False (b) True
  6. 6.🧩 Which part changes electrical energy into movement? (a) an LED (b) a fuse (c) a motor (d) a resistor
  7. 7.🧩 Which part changes electrical energy into sound? (a) a buzzer (b) a capacitor (c) a resistor (d) a diode
  8. 8.🧩 Which component turns a fan or wheels? (a) buzzer (b) capacitor (c) thermistor (d) motor
  9. 9.🧩 Which component smooths a wobbly supply? (a) LDR (b) capacitor (c) resistor (d) thermistor
  10. 10.🧩 Which component boosts a small signal? (a) resistor (b) diode (c) motor (d) transistor
  11. 11.True or false: a thermistor beeps for an alarm. (a) True (b) False
  12. 12.What does a resistor do? (a) glows using little power (b) boosts a small signal (c) makes a beeping sound (d) limits the current
  13. 13.🧩 A capacitor in a circuit can … (a) make light (b) spin a wheel (c) store charge briefly (d) measure heat
  14. 14.True or false: a capacitor has coloured bands. (a) True (b) False
  15. 15.🧩 Which component stores a little charge? (a) buzzer (b) resistor (c) capacitor (d) potentiometer
  16. 16.True or false: a motor makes things spin. (a) False (b) True
  17. 17.True or false: an LED is a resistance knob. (a) False (b) True
  18. 18.True or false: a thermistor senses how hot it is. (a) False (b) True
  19. 19.True or false: a capacitor turns a fan or wheels. (a) False (b) True
  20. 20.True or false: a buzzer has coloured bands. (a) False (b) True
  21. 21.What does a capacitor do? (a) beeps for an alarm (b) makes a beeping sound (c) smooths a wobbly supply (d) glows using little power
  22. 22.What does a potentiometer do? (a) limits the current (b) senses how hot it is (c) is a resistance knob (d) has coloured bands
  23. 23.🧩 Which component beeps for an alarm? (a) fuse (b) buzzer (c) motor (d) transistor
  24. 24.What does an LED do? (a) smooths a wobbly supply (b) stores a little charge (c) beeps for an alarm (d) glows using little power
  25. 25.🧩 Which component glows using little power? (a) transistor (b) resistor (c) diode (d) LED
  26. 26.What does a motor do? (a) turns a fan or wheels (b) senses how bright it is (c) boosts a small signal (d) makes a beeping sound
  27. 27.True or false: a diode stores a little charge. (a) True (b) False
  28. 28.True or false: a buzzer senses how bright it is. (a) False (b) True
  29. 29.True or false: an LDR makes a beeping sound. (a) True (b) False
  30. 30.What does a motor do? (a) has coloured bands (b) beeps for an alarm (c) makes things spin (d) smooths a wobbly supply
  31. 31.True or false: a capacitor glows using little power. (a) True (b) False
  32. 32.True or false: an LED glows using little power. (a) False (b) True
  33. 33.🧩 Which component limits the current? (a) motor (b) resistor (c) potentiometer (d) LED
  34. 34.🧩 Which component makes things spin? (a) fuse (b) transistor (c) diode (d) motor
  35. 35.🧩 Which component senses how hot it is? (a) motor (b) diode (c) thermistor (d) LDR
  36. 36.What does a diode do? (a) makes a beeping sound (b) makes things spin (c) glows using little power (d) lets current go one way
  37. 37.What does a capacitor do? (a) makes things spin (b) beeps for an alarm (c) stores a little charge (d) limits the current
  38. 38.True or false: a buzzer beeps for an alarm. (a) True (b) False
  39. 39.True or false: a motor lets current go one way. (a) False (b) True
  40. 40.What does a thermistor do? (a) blows if current is high (b) beeps for an alarm (c) senses how hot it is (d) glows using little power

Answer key

  1. senses how bright it is
  2. False
  3. True
  4. potentiometer
  5. False
  6. a motor
  7. a buzzer
  8. motor
  9. capacitor
  10. transistor
  11. False
  12. limits the current
  13. store charge briefly
  14. False
  15. capacitor
  16. True
  17. False
  18. True
  19. False
  20. False
  21. smooths a wobbly supply
  22. is a resistance knob
  23. buzzer
  24. glows using little power
  25. LED
  26. turns a fan or wheels
  27. False
  28. False
  29. False
  30. makes things spin
  31. False
  32. True
  33. resistor
  34. motor
  35. thermistor
  36. lets current go one way
  37. stores a little charge
  38. True
  39. False
  40. senses how hot it is

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