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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 388 · 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 limits the current? (a) resistor (b) LED (c) capacitor (d) potentiometer
  2. 2.What does a potentiometer do? (a) is a resistance knob (b) beeps for an alarm (c) makes a beeping sound (d) boosts a small signal
  3. 3.True or false: a thermistor glows using little power. (a) True (b) False
  4. 4.What does an LDR do? (a) makes things spin (b) blows if current is high (c) has coloured bands (d) senses how bright it is
  5. 5.🧩 Which component smooths a wobbly supply? (a) thermistor (b) fuse (c) capacitor (d) buzzer
  6. 6.🧩 A capacitor in a circuit can … (a) make light (b) measure heat (c) spin a wheel (d) store charge briefly
  7. 7.True or false: a buzzer makes a beeping sound. (a) True (b) False
  8. 8.What does a capacitor do? (a) is a resistance knob (b) senses how hot it is (c) glows using little power (d) smooths a wobbly supply
  9. 9.🧩 Which component beeps for an alarm? (a) motor (b) buzzer (c) LDR (d) resistor
  10. 10.🧩 Which component lets current go one way? (a) capacitor (b) potentiometer (c) diode (d) buzzer
  11. 11.🧩 Which part changes electrical energy into sound? (a) a diode (b) a capacitor (c) a buzzer (d) a resistor
  12. 12.True or false: an LED glows using little power. (a) False (b) True
  13. 13.🧩 Which component glows using little power? (a) potentiometer (b) transistor (c) buzzer (d) LED
  14. 14.True or false: a diode boosts a small signal. (a) False (b) True
  15. 15.True or false: a fuse blows if current is high. (a) True (b) False
  16. 16.🧩 Which component has coloured bands? (a) thermistor (b) transistor (c) motor (d) resistor
  17. 17.What does a transistor do? (a) makes things spin (b) makes a beeping sound (c) senses how hot it is (d) boosts a small signal
  18. 18.🧩 Which component makes a beeping sound? (a) fuse (b) buzzer (c) resistor (d) transistor
  19. 19.What does a thermistor do? (a) blows if current is high (b) turns a fan or wheels (c) smooths a wobbly supply (d) senses how hot it is
  20. 20.True or false: a buzzer beeps for an alarm. (a) False (b) True
  21. 21.🧩 Which component blows if current is high? (a) potentiometer (b) LDR (c) fuse (d) resistor
  22. 22.What does a motor do? (a) is a resistance knob (b) senses how bright it is (c) makes things spin (d) glows using little power
  23. 23.What does an LED do? (a) makes a beeping sound (b) glows using little power (c) turns a fan or wheels (d) boosts a small signal
  24. 24.True or false: a capacitor boosts a small signal. (a) True (b) False
  25. 25.🧩 Which component senses how bright it is? (a) resistor (b) buzzer (c) LDR (d) fuse
  26. 26.True or false: a thermistor limits the current. (a) True (b) False
  27. 27.True or false: an LDR glows using little power. (a) True (b) False
  28. 28.True or false: a diode lets current go one way. (a) False (b) True
  29. 29.What does a capacitor do? (a) lets current go one way (b) stores a little charge (c) glows using little power (d) limits the current
  30. 30.🧩 Which part changes electrical energy into movement? (a) a motor (b) an LED (c) a fuse (d) a resistor
  31. 31.True or false: a potentiometer is a resistance knob. (a) False (b) True
  32. 32.What does a resistor do? (a) boosts a small signal (b) blows if current is high (c) has coloured bands (d) makes a beeping sound
  33. 33.True or false: a fuse is a resistance knob. (a) False (b) True
  34. 34.🧩 Which component is a resistance knob? (a) LDR (b) potentiometer (c) buzzer (d) LED
  35. 35.True or false: a thermistor stores a little charge. (a) True (b) False
  36. 36.True or false: a thermistor lets current go one way. (a) False (b) True
  37. 37.True or false: an LDR senses how bright it is. (a) True (b) False
  38. 38.🧩 Which component boosts a small signal? (a) capacitor (b) resistor (c) transistor (d) motor
  39. 39.True or false: a resistor makes a beeping sound. (a) True (b) False
  40. 40.What does a motor do? (a) limits the current (b) turns a fan or wheels (c) is a resistance knob (d) stores a little charge

Answer key

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

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