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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 386 · 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.🧩 A capacitor in a circuit can … (a) spin a wheel (b) make light (c) measure heat (d) store charge briefly
  2. 2.🧩 Which component glows using little power? (a) capacitor (b) LED (c) resistor (d) buzzer
  3. 3.🧩 Which component limits the current? (a) buzzer (b) LDR (c) motor (d) resistor
  4. 4.True or false: a diode glows using little power. (a) True (b) False
  5. 5.🧩 Which component makes things spin? (a) capacitor (b) potentiometer (c) LDR (d) motor
  6. 6.True or false: a potentiometer is a resistance knob. (a) True (b) False
  7. 7.True or false: a motor beeps for an alarm. (a) True (b) False
  8. 8.🧩 Which component smooths a wobbly supply? (a) motor (b) fuse (c) capacitor (d) buzzer
  9. 9.True or false: an LDR is a resistance knob. (a) True (b) False
  10. 10.🧩 Which component blows if current is high? (a) diode (b) capacitor (c) fuse (d) transistor
  11. 11.True or false: a capacitor makes things spin. (a) True (b) False
  12. 12.🧩 Which component makes a beeping sound? (a) buzzer (b) capacitor (c) fuse (d) LED
  13. 13.What does a fuse do? (a) senses how bright it is (b) beeps for an alarm (c) blows if current is high (d) smooths a wobbly supply
  14. 14.🧩 Which component lets current go one way? (a) transistor (b) buzzer (c) motor (d) diode
  15. 15.True or false: a buzzer makes a beeping sound. (a) True (b) False
  16. 16.What does a capacitor do? (a) makes things spin (b) makes a beeping sound (c) blows if current is high (d) stores a little charge
  17. 17.What does a buzzer do? (a) stores a little charge (b) senses how bright it is (c) limits the current (d) beeps for an alarm
  18. 18.🧩 Which component has coloured bands? (a) thermistor (b) resistor (c) LED (d) motor
  19. 19.What does a resistor do? (a) makes a beeping sound (b) limits the current (c) senses how hot it is (d) stores a little charge
  20. 20.🧩 Which component beeps for an alarm? (a) capacitor (b) transistor (c) potentiometer (d) buzzer
  21. 21.🧩 Which component senses how hot it is? (a) motor (b) resistor (c) thermistor (d) capacitor
  22. 22.🧩 Which component boosts a small signal? (a) transistor (b) thermistor (c) capacitor (d) buzzer
  23. 23.True or false: a resistor boosts a small signal. (a) False (b) True
  24. 24.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a buzzer (c) a resistor (d) a diode
  25. 25.What does a potentiometer do? (a) limits the current (b) senses how hot it is (c) boosts a small signal (d) is a resistance knob
  26. 26.🧩 Which component senses how bright it is? (a) LDR (b) capacitor (c) potentiometer (d) thermistor
  27. 27.True or false: a transistor senses how hot it is. (a) False (b) True
  28. 28.What does a resistor do? (a) has coloured bands (b) senses how hot it is (c) beeps for an alarm (d) smooths a wobbly supply
  29. 29.🧩 Which component stores a little charge? (a) LED (b) resistor (c) capacitor (d) diode
  30. 30.🧩 Which part changes electrical energy into movement? (a) a motor (b) a resistor (c) a fuse (d) an LED
  31. 31.True or false: a motor limits the current. (a) False (b) True
  32. 32.True or false: a motor makes a beeping sound. (a) True (b) False
  33. 33.True or false: a resistor makes things spin. (a) True (b) False
  34. 34.What does a capacitor do? (a) has coloured bands (b) smooths a wobbly supply (c) limits the current (d) makes things spin
  35. 35.True or false: a motor senses how bright it is. (a) True (b) False
  36. 36.True or false: a capacitor senses how bright it is. (a) False (b) True
  37. 37.True or false: a resistor limits the current. (a) True (b) False
  38. 38.True or false: a capacitor smooths a wobbly supply. (a) True (b) False
  39. 39.What does a buzzer do? (a) blows if current is high (b) senses how hot it is (c) smooths a wobbly supply (d) makes a beeping sound
  40. 40.🧩 Which component turns a fan or wheels? (a) thermistor (b) LDR (c) motor (d) fuse

Answer key

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

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