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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 102 · 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 thermistor senses how hot it is. (a) False (b) True
  2. 2.🧩 Which part changes electrical energy into sound? (a) a diode (b) a resistor (c) a capacitor (d) a buzzer
  3. 3.What does a fuse do? (a) blows if current is high (b) lets current go one way (c) limits the current (d) senses how bright it is
  4. 4.True or false: an LED glows using little power. (a) False (b) True
  5. 5.What does a buzzer do? (a) blows if current is high (b) senses how bright it is (c) senses how hot it is (d) makes a beeping sound
  6. 6.🧩 Which component stores a little charge? (a) potentiometer (b) motor (c) capacitor (d) LED
  7. 7.True or false: a capacitor turns a fan or wheels. (a) True (b) False
  8. 8.True or false: a potentiometer is a resistance knob. (a) True (b) False
  9. 9.What does a transistor do? (a) boosts a small signal (b) makes a beeping sound (c) stores a little charge (d) has coloured bands
  10. 10.🧩 Which part changes electrical energy into movement? (a) an LED (b) a fuse (c) a motor (d) a resistor
  11. 11.What does a motor do? (a) smooths a wobbly supply (b) limits the current (c) turns a fan or wheels (d) blows if current is high
  12. 12.🧩 Which component glows using little power? (a) buzzer (b) LED (c) transistor (d) LDR
  13. 13.🧩 Which component smooths a wobbly supply? (a) potentiometer (b) fuse (c) capacitor (d) motor
  14. 14.True or false: an LED limits the current. (a) True (b) False
  15. 15.What does an LED do? (a) has coloured bands (b) glows using little power (c) boosts a small signal (d) senses how bright it is
  16. 16.🧩 Which component lets current go one way? (a) motor (b) thermistor (c) diode (d) resistor
  17. 17.True or false: a buzzer makes a beeping sound. (a) True (b) False
  18. 18.True or false: a buzzer beeps for an alarm. (a) True (b) False
  19. 19.What does a diode do? (a) beeps for an alarm (b) limits the current (c) lets current go one way (d) blows if current is high
  20. 20.What does a resistor do? (a) blows if current is high (b) makes a beeping sound (c) limits the current (d) senses how hot it is
  21. 21.🧩 Which component senses how hot it is? (a) diode (b) potentiometer (c) thermistor (d) capacitor
  22. 22.True or false: a resistor has coloured bands. (a) True (b) False
  23. 23.🧩 A capacitor in a circuit can … (a) make light (b) measure heat (c) spin a wheel (d) store charge briefly
  24. 24.🧩 Which component turns a fan or wheels? (a) motor (b) LDR (c) resistor (d) fuse
  25. 25.🧩 Which component makes things spin? (a) motor (b) potentiometer (c) LED (d) thermistor
  26. 26.True or false: a resistor limits the current. (a) False (b) True
  27. 27.🧩 Which component beeps for an alarm? (a) buzzer (b) capacitor (c) motor (d) potentiometer
  28. 28.True or false: a thermistor turns a fan or wheels. (a) True (b) False
  29. 29.True or false: a resistor beeps for an alarm. (a) True (b) False
  30. 30.True or false: an LED turns a fan or wheels. (a) False (b) True
  31. 31.True or false: an LED senses how hot it is. (a) True (b) False
  32. 32.True or false: a fuse blows if current is high. (a) False (b) True
  33. 33.True or false: a transistor lets current go one way. (a) False (b) True
  34. 34.What does a thermistor do? (a) turns a fan or wheels (b) blows if current is high (c) boosts a small signal (d) senses how hot it is
  35. 35.What does a capacitor do? (a) turns a fan or wheels (b) has coloured bands (c) makes a beeping sound (d) stores a little charge
  36. 36.🧩 Which component has coloured bands? (a) thermistor (b) LDR (c) resistor (d) capacitor
  37. 37.True or false: a diode stores a little charge. (a) True (b) False
  38. 38.🧩 Which component makes a beeping sound? (a) resistor (b) fuse (c) LED (d) buzzer
  39. 39.True or false: a capacitor blows if current is high. (a) True (b) False
  40. 40.What does a resistor do? (a) is a resistance knob (b) has coloured bands (c) blows if current is high (d) boosts a small signal

Answer key

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

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