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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 291 · 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) lets current go one way (b) senses how bright it is (c) makes a beeping sound (d) has coloured bands
  2. 2.🧩 Which component smooths a wobbly supply? (a) motor (b) diode (c) buzzer (d) capacitor
  3. 3.True or false: a thermistor senses how hot it is. (a) False (b) True
  4. 4.True or false: a buzzer makes a beeping sound. (a) True (b) False
  5. 5.What does a fuse do? (a) makes things spin (b) is a resistance knob (c) stores a little charge (d) blows if current is high
  6. 6.What does a transistor do? (a) turns a fan or wheels (b) boosts a small signal (c) makes a beeping sound (d) has coloured bands
  7. 7.True or false: a motor makes things spin. (a) False (b) True
  8. 8.What does a resistor do? (a) turns a fan or wheels (b) limits the current (c) senses how hot it is (d) is a resistance knob
  9. 9.🧩 Which component makes things spin? (a) fuse (b) capacitor (c) thermistor (d) motor
  10. 10.What does a thermistor do? (a) makes a beeping sound (b) has coloured bands (c) senses how hot it is (d) limits the current
  11. 11.True or false: a resistor has coloured bands. (a) False (b) True
  12. 12.🧩 Which component senses how bright it is? (a) potentiometer (b) thermistor (c) fuse (d) LDR
  13. 13.What does a resistor do? (a) stores a little charge (b) has coloured bands (c) beeps for an alarm (d) makes a beeping sound
  14. 14.🧩 Which component lets current go one way? (a) resistor (b) capacitor (c) diode (d) potentiometer
  15. 15.What does a capacitor do? (a) boosts a small signal (b) senses how bright it is (c) has coloured bands (d) stores a little charge
  16. 16.True or false: a fuse beeps for an alarm. (a) True (b) False
  17. 17.What does a motor do? (a) senses how bright it is (b) stores a little charge (c) limits the current (d) turns a fan or wheels
  18. 18.🧩 Which part changes electrical energy into movement? (a) an LED (b) a motor (c) a fuse (d) a resistor
  19. 19.🧩 Which part changes electrical energy into sound? (a) a diode (b) a capacitor (c) a resistor (d) a buzzer
  20. 20.🧩 Which component glows using little power? (a) potentiometer (b) diode (c) LED (d) capacitor
  21. 21.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
  22. 22.True or false: a buzzer smooths a wobbly supply. (a) True (b) False
  23. 23.What does a motor do? (a) has coloured bands (b) senses how hot it is (c) lets current go one way (d) makes things spin
  24. 24.True or false: a transistor boosts a small signal. (a) True (b) False
  25. 25.🧩 Which component limits the current? (a) buzzer (b) LDR (c) LED (d) resistor
  26. 26.🧩 Which component senses how hot it is? (a) fuse (b) LED (c) thermistor (d) diode
  27. 27.True or false: an LDR senses how bright it is. (a) True (b) False
  28. 28.🧩 A capacitor in a circuit can … (a) measure heat (b) spin a wheel (c) store charge briefly (d) make light
  29. 29.True or false: a potentiometer smooths a wobbly supply. (a) True (b) False
  30. 30.What does a potentiometer do? (a) is a resistance knob (b) senses how bright it is (c) senses how hot it is (d) makes a beeping sound
  31. 31.True or false: an LED glows using little power. (a) True (b) False
  32. 32.True or false: a capacitor makes things spin. (a) True (b) False
  33. 33.True or false: a buzzer beeps for an alarm. (a) False (b) True
  34. 34.🧩 Which component beeps for an alarm? (a) buzzer (b) LED (c) potentiometer (d) capacitor
  35. 35.True or false: a potentiometer stores a little charge. (a) True (b) False
  36. 36.🧩 Which component turns a fan or wheels? (a) diode (b) motor (c) transistor (d) capacitor
  37. 37.True or false: an LDR has coloured bands. (a) True (b) False
  38. 38.What does a buzzer do? (a) boosts a small signal (b) beeps for an alarm (c) smooths a wobbly supply (d) blows if current is high
  39. 39.True or false: a potentiometer makes things spin. (a) True (b) False
  40. 40.🧩 Which component blows if current is high? (a) buzzer (b) fuse (c) potentiometer (d) capacitor

Answer key

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

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