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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 211 · 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) capacitor (b) thermistor (c) diode (d) resistor
  2. 2.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a diode (c) a buzzer (d) a resistor
  3. 3.🧩 A capacitor in a circuit can … (a) store charge briefly (b) spin a wheel (c) make light (d) measure heat
  4. 4.True or false: a motor limits the current. (a) True (b) False
  5. 5.What does a resistor do? (a) stores a little charge (b) blows if current is high (c) limits the current (d) turns a fan or wheels
  6. 6.True or false: a diode is a resistance knob. (a) True (b) False
  7. 7.What does a thermistor do? (a) glows using little power (b) senses how bright it is (c) senses how hot it is (d) boosts a small signal
  8. 8.True or false: a capacitor senses how hot it is. (a) True (b) False
  9. 9.What does a motor do? (a) has coloured bands (b) limits the current (c) boosts a small signal (d) turns a fan or wheels
  10. 10.🧩 Which part changes electrical energy into movement? (a) a resistor (b) a motor (c) an LED (d) a fuse
  11. 11.🧩 Which component makes things spin? (a) fuse (b) diode (c) motor (d) potentiometer
  12. 12.🧩 Which component limits the current? (a) diode (b) resistor (c) motor (d) LDR
  13. 13.🧩 Which component glows using little power? (a) buzzer (b) LED (c) LDR (d) potentiometer
  14. 14.What does a buzzer do? (a) lets current go one way (b) makes a beeping sound (c) boosts a small signal (d) glows using little power
  15. 15.True or false: a potentiometer is a resistance knob. (a) True (b) False
  16. 16.🧩 Which component blows if current is high? (a) thermistor (b) motor (c) fuse (d) resistor
  17. 17.🧩 Which component senses how hot it is? (a) thermistor (b) diode (c) capacitor (d) buzzer
  18. 18.True or false: an LED glows using little power. (a) True (b) False
  19. 19.True or false: a resistor turns a fan or wheels. (a) True (b) False
  20. 20.True or false: an LDR glows using little power. (a) False (b) True
  21. 21.True or false: a fuse has coloured bands. (a) False (b) True
  22. 22.🧩 Which component senses how bright it is? (a) thermistor (b) LDR (c) potentiometer (d) transistor
  23. 23.True or false: a motor turns a fan or wheels. (a) False (b) True
  24. 24.🧩 Which component makes a beeping sound? (a) buzzer (b) LDR (c) diode (d) motor
  25. 25.True or false: a buzzer makes a beeping sound. (a) False (b) True
  26. 26.What does a capacitor do? (a) makes things spin (b) beeps for an alarm (c) smooths a wobbly supply (d) blows if current is high
  27. 27.🧩 Which component beeps for an alarm? (a) motor (b) thermistor (c) buzzer (d) LED
  28. 28.True or false: an LED smooths a wobbly supply. (a) True (b) False
  29. 29.🧩 Which component turns a fan or wheels? (a) thermistor (b) buzzer (c) LED (d) motor
  30. 30.True or false: a resistor limits the current. (a) False (b) True
  31. 31.True or false: a transistor smooths a wobbly supply. (a) False (b) True
  32. 32.What does a potentiometer do? (a) has coloured bands (b) glows using little power (c) is a resistance knob (d) turns a fan or wheels
  33. 33.True or false: a fuse senses how hot it is. (a) False (b) True
  34. 34.What does a fuse do? (a) beeps for an alarm (b) blows if current is high (c) is a resistance knob (d) makes a beeping sound
  35. 35.True or false: a fuse glows using little power. (a) True (b) False
  36. 36.What does a resistor do? (a) has coloured bands (b) boosts a small signal (c) makes a beeping sound (d) senses how bright it is
  37. 37.True or false: an LDR beeps for an alarm. (a) True (b) False
  38. 38.True or false: a potentiometer senses how hot it is. (a) True (b) False
  39. 39.What does a capacitor do? (a) senses how hot it is (b) has coloured bands (c) stores a little charge (d) limits the current
  40. 40.What does a transistor do? (a) has coloured bands (b) boosts a small signal (c) glows using little power (d) senses how bright it is

Answer key

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

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