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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 131 · 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 transistor boosts a small signal. (a) True (b) False
  2. 2.🧩 Which component senses how hot it is? (a) fuse (b) transistor (c) resistor (d) thermistor
  3. 3.What does a capacitor do? (a) blows if current is high (b) makes a beeping sound (c) stores a little charge (d) senses how bright it is
  4. 4.What does a thermistor do? (a) senses how hot it is (b) smooths a wobbly supply (c) is a resistance knob (d) has coloured bands
  5. 5.🧩 A capacitor in a circuit can … (a) spin a wheel (b) make light (c) measure heat (d) store charge briefly
  6. 6.What does a resistor do? (a) boosts a small signal (b) smooths a wobbly supply (c) stores a little charge (d) has coloured bands
  7. 7.What does a motor do? (a) turns a fan or wheels (b) limits the current (c) stores a little charge (d) glows using little power
  8. 8.🧩 Which part changes electrical energy into movement? (a) an LED (b) a fuse (c) a motor (d) a resistor
  9. 9.True or false: a motor turns a fan or wheels. (a) True (b) False
  10. 10.What does a resistor do? (a) senses how hot it is (b) makes a beeping sound (c) lets current go one way (d) limits the current
  11. 11.🧩 Which part changes electrical energy into sound? (a) a buzzer (b) a resistor (c) a diode (d) a capacitor
  12. 12.🧩 Which component has coloured bands? (a) transistor (b) potentiometer (c) resistor (d) buzzer
  13. 13.True or false: a buzzer senses how hot it is. (a) True (b) False
  14. 14.🧩 Which component makes a beeping sound? (a) potentiometer (b) buzzer (c) fuse (d) capacitor
  15. 15.What does a transistor do? (a) turns a fan or wheels (b) boosts a small signal (c) is a resistance knob (d) has coloured bands
  16. 16.🧩 Which component glows using little power? (a) motor (b) buzzer (c) LED (d) potentiometer
  17. 17.True or false: a fuse has coloured bands. (a) True (b) False
  18. 18.True or false: a potentiometer lets current go one way. (a) False (b) True
  19. 19.True or false: a transistor stores a little charge. (a) False (b) True
  20. 20.True or false: a fuse blows if current is high. (a) True (b) False
  21. 21.True or false: a buzzer turns a fan or wheels. (a) True (b) False
  22. 22.True or false: an LED makes a beeping sound. (a) False (b) True
  23. 23.🧩 Which component beeps for an alarm? (a) fuse (b) motor (c) buzzer (d) LDR
  24. 24.🧩 Which component smooths a wobbly supply? (a) fuse (b) LED (c) capacitor (d) motor
  25. 25.True or false: a fuse stores a little charge. (a) True (b) False
  26. 26.What does a fuse do? (a) blows if current is high (b) turns a fan or wheels (c) has coloured bands (d) is a resistance knob
  27. 27.🧩 Which component makes things spin? (a) LED (b) buzzer (c) LDR (d) motor
  28. 28.🧩 Which component is a resistance knob? (a) motor (b) thermistor (c) transistor (d) potentiometer
  29. 29.True or false: a buzzer makes a beeping sound. (a) False (b) True
  30. 30.True or false: a transistor limits the current. (a) False (b) True
  31. 31.True or false: a buzzer beeps for an alarm. (a) True (b) False
  32. 32.What does an LDR do? (a) makes a beeping sound (b) makes things spin (c) senses how bright it is (d) blows if current is high
  33. 33.What does an LED do? (a) boosts a small signal (b) limits the current (c) senses how hot it is (d) glows using little power
  34. 34.True or false: an LED stores a little charge. (a) False (b) True
  35. 35.What does a motor do? (a) blows if current is high (b) makes things spin (c) glows using little power (d) boosts a small signal
  36. 36.True or false: a resistor turns a fan or wheels. (a) False (b) True
  37. 37.True or false: a thermistor senses how hot it is. (a) False (b) True
  38. 38.True or false: an LED has coloured bands. (a) True (b) False
  39. 39.True or false: a potentiometer makes a beeping sound. (a) True (b) False
  40. 40.🧩 Which component blows if current is high? (a) transistor (b) motor (c) buzzer (d) fuse

Answer key

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

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