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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 325 · 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.🧩 Which component smooths a wobbly supply? (a) resistor (b) capacitor (c) LDR (d) motor
  2. 2.True or false: a thermistor makes things spin. (a) True (b) False
  3. 3.🧩 Which part changes electrical energy into movement? (a) a motor (b) a resistor (c) a fuse (d) an LED
  4. 4.🧩 Which component glows using little power? (a) LED (b) capacitor (c) potentiometer (d) buzzer
  5. 5.🧩 Which part changes electrical energy into sound? (a) a buzzer (b) a resistor (c) a capacitor (d) a diode
  6. 6.What does a resistor do? (a) smooths a wobbly supply (b) has coloured bands (c) turns a fan or wheels (d) makes a beeping sound
  7. 7.🧩 Which component lets current go one way? (a) buzzer (b) diode (c) capacitor (d) LDR
  8. 8.🧩 A capacitor in a circuit can … (a) spin a wheel (b) measure heat (c) make light (d) store charge briefly
  9. 9.🧩 Which component senses how hot it is? (a) fuse (b) buzzer (c) thermistor (d) LED
  10. 10.🧩 Which component is a resistance knob? (a) resistor (b) buzzer (c) fuse (d) potentiometer
  11. 11.🧩 Which component limits the current? (a) fuse (b) motor (c) capacitor (d) resistor
  12. 12.🧩 Which component has coloured bands? (a) resistor (b) transistor (c) fuse (d) thermistor
  13. 13.True or false: an LDR senses how hot it is. (a) False (b) True
  14. 14.True or false: a thermistor senses how hot it is. (a) True (b) False
  15. 15.True or false: a diode lets current go one way. (a) True (b) False
  16. 16.True or false: a thermistor glows using little power. (a) False (b) True
  17. 17.True or false: a fuse limits the current. (a) True (b) False
  18. 18.True or false: an LED glows using little power. (a) True (b) False
  19. 19.What does a diode do? (a) has coloured bands (b) is a resistance knob (c) lets current go one way (d) makes a beeping sound
  20. 20.🧩 Which component senses how bright it is? (a) motor (b) LDR (c) potentiometer (d) buzzer
  21. 21.True or false: a capacitor lets current go one way. (a) True (b) False
  22. 22.What does an LDR do? (a) senses how bright it is (b) senses how hot it is (c) turns a fan or wheels (d) blows if current is high
  23. 23.True or false: a motor glows using little power. (a) False (b) True
  24. 24.True or false: a capacitor smooths a wobbly supply. (a) True (b) False
  25. 25.🧩 Which component beeps for an alarm? (a) transistor (b) thermistor (c) buzzer (d) LDR
  26. 26.True or false: a buzzer senses how hot it is. (a) False (b) True
  27. 27.What does a potentiometer do? (a) boosts a small signal (b) smooths a wobbly supply (c) glows using little power (d) is a resistance knob
  28. 28.What does a buzzer do? (a) beeps for an alarm (b) is a resistance knob (c) glows using little power (d) senses how bright it is
  29. 29.🧩 Which component turns a fan or wheels? (a) motor (b) resistor (c) buzzer (d) potentiometer
  30. 30.True or false: a capacitor has coloured bands. (a) False (b) True
  31. 31.What does a thermistor do? (a) beeps for an alarm (b) boosts a small signal (c) has coloured bands (d) senses how hot it is
  32. 32.What does a capacitor do? (a) stores a little charge (b) makes a beeping sound (c) lets current go one way (d) beeps for an alarm
  33. 33.True or false: a potentiometer senses how hot it is. (a) False (b) True
  34. 34.What does a fuse do? (a) limits the current (b) blows if current is high (c) is a resistance knob (d) turns a fan or wheels
  35. 35.True or false: a buzzer beeps for an alarm. (a) True (b) False
  36. 36.True or false: a resistor senses how hot it is. (a) False (b) True
  37. 37.🧩 Which component boosts a small signal? (a) transistor (b) resistor (c) diode (d) LDR
  38. 38.True or false: an LDR boosts a small signal. (a) True (b) False
  39. 39.What does a buzzer do? (a) senses how hot it is (b) blows if current is high (c) makes a beeping sound (d) stores a little charge
  40. 40.What does a capacitor do? (a) turns a fan or wheels (b) has coloured bands (c) glows using little power (d) smooths a wobbly supply

Answer key

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

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