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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 287 · 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: an LED glows using little power. (a) False (b) True
  2. 2.What does a resistor do? (a) beeps for an alarm (b) limits the current (c) is a resistance knob (d) makes a beeping sound
  3. 3.🧩 Which component boosts a small signal? (a) capacitor (b) transistor (c) fuse (d) potentiometer
  4. 4.🧩 Which component glows using little power? (a) potentiometer (b) diode (c) LED (d) capacitor
  5. 5.🧩 A capacitor in a circuit can … (a) make light (b) spin a wheel (c) store charge briefly (d) measure heat
  6. 6.🧩 Which component makes things spin? (a) buzzer (b) diode (c) thermistor (d) motor
  7. 7.🧩 Which part changes electrical energy into sound? (a) a buzzer (b) a diode (c) a capacitor (d) a resistor
  8. 8.🧩 Which part changes electrical energy into movement? (a) a motor (b) a resistor (c) a fuse (d) an LED
  9. 9.True or false: an LDR blows if current is high. (a) False (b) True
  10. 10.🧩 Which component has coloured bands? (a) transistor (b) resistor (c) capacitor (d) diode
  11. 11.🧩 Which component blows if current is high? (a) capacitor (b) transistor (c) fuse (d) thermistor
  12. 12.True or false: a buzzer has coloured bands. (a) True (b) False
  13. 13.What does an LDR do? (a) limits the current (b) makes things spin (c) blows if current is high (d) senses how bright it is
  14. 14.What does a transistor do? (a) is a resistance knob (b) makes things spin (c) boosts a small signal (d) beeps for an alarm
  15. 15.True or false: a motor limits the current. (a) False (b) True
  16. 16.What does a capacitor do? (a) beeps for an alarm (b) makes things spin (c) has coloured bands (d) smooths a wobbly supply
  17. 17.🧩 Which component is a resistance knob? (a) potentiometer (b) transistor (c) fuse (d) LDR
  18. 18.What does a thermistor do? (a) lets current go one way (b) senses how hot it is (c) has coloured bands (d) stores a little charge
  19. 19.True or false: a resistor lets current go one way. (a) True (b) False
  20. 20.True or false: an LDR makes things spin. (a) True (b) False
  21. 21.🧩 Which component turns a fan or wheels? (a) thermistor (b) buzzer (c) resistor (d) motor
  22. 22.True or false: a buzzer makes a beeping sound. (a) True (b) False
  23. 23.True or false: a resistor beeps for an alarm. (a) False (b) True
  24. 24.True or false: a buzzer senses how bright it is. (a) False (b) True
  25. 25.What does a potentiometer do? (a) makes things spin (b) beeps for an alarm (c) lets current go one way (d) is a resistance knob
  26. 26.True or false: a resistor limits the current. (a) True (b) False
  27. 27.True or false: an LDR smooths a wobbly supply. (a) True (b) False
  28. 28.What does a capacitor do? (a) boosts a small signal (b) senses how hot it is (c) stores a little charge (d) has coloured bands
  29. 29.🧩 Which component beeps for an alarm? (a) buzzer (b) transistor (c) diode (d) fuse
  30. 30.True or false: a motor makes things spin. (a) False (b) True
  31. 31.True or false: a fuse blows if current is high. (a) True (b) False
  32. 32.What does a buzzer do? (a) turns a fan or wheels (b) blows if current is high (c) makes a beeping sound (d) has coloured bands
  33. 33.True or false: an LED senses how bright it is. (a) True (b) False
  34. 34.🧩 Which component senses how hot it is? (a) resistor (b) diode (c) LED (d) thermistor
  35. 35.True or false: a transistor boosts a small signal. (a) False (b) True
  36. 36.What does a resistor do? (a) glows using little power (b) stores a little charge (c) has coloured bands (d) is a resistance knob
  37. 37.🧩 Which component limits the current? (a) diode (b) LDR (c) capacitor (d) resistor
  38. 38.True or false: a capacitor stores a little charge. (a) False (b) True
  39. 39.True or false: a diode lets current go one way. (a) False (b) True
  40. 40.What does a motor do? (a) makes a beeping sound (b) blows if current is high (c) has coloured bands (d) turns a fan or wheels

Answer key

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

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