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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 403 · 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.What does an LED do? (a) beeps for an alarm (b) has coloured bands (c) turns a fan or wheels (d) glows using little power
  2. 2.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
  3. 3.What does a diode do? (a) senses how bright it is (b) beeps for an alarm (c) limits the current (d) lets current go one way
  4. 4.🧩 Which component makes things spin? (a) transistor (b) potentiometer (c) motor (d) resistor
  5. 5.What does a capacitor do? (a) makes a beeping sound (b) stores a little charge (c) glows using little power (d) has coloured bands
  6. 6.True or false: a motor makes things spin. (a) False (b) True
  7. 7.What does a potentiometer do? (a) beeps for an alarm (b) senses how bright it is (c) glows using little power (d) is a resistance knob
  8. 8.🧩 Which component limits the current? (a) motor (b) capacitor (c) resistor (d) fuse
  9. 9.🧩 Which component blows if current is high? (a) motor (b) resistor (c) fuse (d) diode
  10. 10.🧩 Which component boosts a small signal? (a) resistor (b) transistor (c) buzzer (d) potentiometer
  11. 11.True or false: a thermistor glows using little power. (a) False (b) True
  12. 12.True or false: a resistor limits the current. (a) False (b) True
  13. 13.🧩 A capacitor in a circuit can … (a) spin a wheel (b) store charge briefly (c) measure heat (d) make light
  14. 14.True or false: an LDR senses how bright it is. (a) True (b) False
  15. 15.🧩 Which component has coloured bands? (a) buzzer (b) diode (c) LED (d) resistor
  16. 16.True or false: a resistor has coloured bands. (a) True (b) False
  17. 17.What does a resistor do? (a) has coloured bands (b) is a resistance knob (c) makes a beeping sound (d) stores a little charge
  18. 18.🧩 Which part changes electrical energy into movement? (a) a fuse (b) a resistor (c) an LED (d) a motor
  19. 19.What does a fuse do? (a) glows using little power (b) lets current go one way (c) blows if current is high (d) senses how hot it is
  20. 20.🧩 Which component turns a fan or wheels? (a) capacitor (b) thermistor (c) LED (d) motor
  21. 21.What does a motor do? (a) blows if current is high (b) limits the current (c) turns a fan or wheels (d) has coloured bands
  22. 22.True or false: a fuse blows if current is high. (a) False (b) True
  23. 23.🧩 Which component stores a little charge? (a) capacitor (b) diode (c) transistor (d) motor
  24. 24.🧩 Which component beeps for an alarm? (a) transistor (b) resistor (c) potentiometer (d) buzzer
  25. 25.True or false: a capacitor blows if current is high. (a) True (b) False
  26. 26.🧩 Which component senses how bright it is? (a) thermistor (b) motor (c) buzzer (d) LDR
  27. 27.What does a buzzer do? (a) stores a little charge (b) turns a fan or wheels (c) makes things spin (d) makes a beeping sound
  28. 28.🧩 Which component smooths a wobbly supply? (a) capacitor (b) LDR (c) LED (d) fuse
  29. 29.True or false: a capacitor stores a little charge. (a) True (b) False
  30. 30.What does an LDR do? (a) beeps for an alarm (b) senses how bright it is (c) blows if current is high (d) senses how hot it is
  31. 31.True or false: a buzzer boosts a small signal. (a) True (b) False
  32. 32.🧩 Which part changes electrical energy into sound? (a) a diode (b) a capacitor (c) a buzzer (d) a resistor
  33. 33.True or false: a diode turns a fan or wheels. (a) True (b) False
  34. 34.🧩 Which component makes a beeping sound? (a) diode (b) buzzer (c) thermistor (d) capacitor
  35. 35.True or false: an LED glows using little power. (a) True (b) False
  36. 36.What does a resistor do? (a) senses how hot it is (b) boosts a small signal (c) limits the current (d) beeps for an alarm
  37. 37.True or false: a thermistor has coloured bands. (a) True (b) False
  38. 38.🧩 Which component is a resistance knob? (a) transistor (b) potentiometer (c) capacitor (d) LDR
  39. 39.True or false: a potentiometer is a resistance knob. (a) True (b) False
  40. 40.True or false: a potentiometer smooths a wobbly supply. (a) True (b) False

Answer key

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

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