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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 449 · 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 buzzer beeps for an alarm. (a) True (b) False
  2. 2.🧩 Which component beeps for an alarm? (a) potentiometer (b) fuse (c) buzzer (d) LDR
  3. 3.True or false: a capacitor is a resistance knob. (a) True (b) False
  4. 4.True or false: a resistor limits the current. (a) False (b) True
  5. 5.True or false: a fuse stores a little charge. (a) True (b) False
  6. 6.True or false: a thermistor beeps for an alarm. (a) True (b) False
  7. 7.🧩 Which part changes electrical energy into movement? (a) a fuse (b) an LED (c) a motor (d) a resistor
  8. 8.🧩 Which component smooths a wobbly supply? (a) transistor (b) capacitor (c) buzzer (d) motor
  9. 9.What does a fuse do? (a) turns a fan or wheels (b) glows using little power (c) blows if current is high (d) makes things spin
  10. 10.What does an LED do? (a) stores a little charge (b) makes a beeping sound (c) glows using little power (d) senses how hot it is
  11. 11.What does a transistor do? (a) glows using little power (b) lets current go one way (c) boosts a small signal (d) senses how hot it is
  12. 12.True or false: a diode has coloured bands. (a) False (b) True
  13. 13.🧩 A capacitor in a circuit can … (a) make light (b) measure heat (c) store charge briefly (d) spin a wheel
  14. 14.🧩 Which part changes electrical energy into sound? (a) a diode (b) a buzzer (c) a capacitor (d) a resistor
  15. 15.What does a potentiometer do? (a) senses how bright it is (b) turns a fan or wheels (c) makes things spin (d) is a resistance knob
  16. 16.What does a buzzer do? (a) limits the current (b) is a resistance knob (c) makes a beeping sound (d) turns a fan or wheels
  17. 17.🧩 Which component blows if current is high? (a) LED (b) diode (c) fuse (d) capacitor
  18. 18.What does a resistor do? (a) turns a fan or wheels (b) beeps for an alarm (c) senses how hot it is (d) has coloured bands
  19. 19.🧩 Which component limits the current? (a) LED (b) resistor (c) motor (d) capacitor
  20. 20.True or false: a diode lets current go one way. (a) False (b) True
  21. 21.🧩 Which component makes a beeping sound? (a) fuse (b) resistor (c) thermistor (d) buzzer
  22. 22.What does a capacitor do? (a) limits the current (b) glows using little power (c) smooths a wobbly supply (d) makes a beeping sound
  23. 23.🧩 Which component has coloured bands? (a) diode (b) motor (c) fuse (d) resistor
  24. 24.True or false: a buzzer turns a fan or wheels. (a) False (b) True
  25. 25.True or false: an LED glows using little power. (a) False (b) True
  26. 26.What does a buzzer do? (a) beeps for an alarm (b) blows if current is high (c) lets current go one way (d) smooths a wobbly supply
  27. 27.True or false: a transistor boosts a small signal. (a) True (b) False
  28. 28.🧩 Which component turns a fan or wheels? (a) capacitor (b) motor (c) LED (d) potentiometer
  29. 29.🧩 Which component makes things spin? (a) LDR (b) capacitor (c) buzzer (d) motor
  30. 30.🧩 Which component is a resistance knob? (a) capacitor (b) resistor (c) transistor (d) potentiometer
  31. 31.🧩 Which component lets current go one way? (a) capacitor (b) LDR (c) fuse (d) diode
  32. 32.🧩 Which component senses how bright it is? (a) diode (b) capacitor (c) motor (d) LDR
  33. 33.🧩 Which component senses how hot it is? (a) motor (b) LDR (c) transistor (d) thermistor
  34. 34.True or false: a resistor has coloured bands. (a) False (b) True
  35. 35.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
  36. 36.True or false: a capacitor has coloured bands. (a) False (b) True
  37. 37.True or false: a motor smooths a wobbly supply. (a) False (b) True
  38. 38.True or false: a capacitor stores a little charge. (a) True (b) False
  39. 39.True or false: a motor glows using little power. (a) False (b) True
  40. 40.🧩 Which component glows using little power? (a) motor (b) LED (c) fuse (d) thermistor

Answer key

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

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