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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 451 · 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 fuse blows if current is high. (a) False (b) True
  2. 2.What does a diode do? (a) has coloured bands (b) lets current go one way (c) makes things spin (d) blows if current is high
  3. 3.🧩 Which component senses how hot it is? (a) LED (b) potentiometer (c) fuse (d) thermistor
  4. 4.🧩 Which component is a resistance knob? (a) buzzer (b) resistor (c) transistor (d) potentiometer
  5. 5.What does a capacitor do? (a) beeps for an alarm (b) limits the current (c) stores a little charge (d) glows using little power
  6. 6.🧩 Which component stores a little charge? (a) potentiometer (b) diode (c) thermistor (d) capacitor
  7. 7.🧩 Which component boosts a small signal? (a) LDR (b) resistor (c) capacitor (d) transistor
  8. 8.🧩 A capacitor in a circuit can … (a) measure heat (b) spin a wheel (c) store charge briefly (d) make light
  9. 9.🧩 Which component has coloured bands? (a) fuse (b) resistor (c) motor (d) capacitor
  10. 10.True or false: a resistor limits the current. (a) True (b) False
  11. 11.What does a transistor do? (a) blows if current is high (b) makes a beeping sound (c) limits the current (d) boosts a small signal
  12. 12.What does a buzzer do? (a) is a resistance knob (b) senses how bright it is (c) makes things spin (d) makes a beeping sound
  13. 13.🧩 Which component smooths a wobbly supply? (a) capacitor (b) diode (c) fuse (d) resistor
  14. 14.True or false: a potentiometer smooths a wobbly supply. (a) False (b) True
  15. 15.What does an LED do? (a) glows using little power (b) makes a beeping sound (c) makes things spin (d) has coloured bands
  16. 16.🧩 Which component turns a fan or wheels? (a) LDR (b) motor (c) LED (d) buzzer
  17. 17.True or false: an LED blows if current is high. (a) True (b) False
  18. 18.🧩 Which component blows if current is high? (a) potentiometer (b) capacitor (c) fuse (d) LDR
  19. 19.True or false: a potentiometer is a resistance knob. (a) False (b) True
  20. 20.🧩 Which part changes electrical energy into movement? (a) a resistor (b) an LED (c) a motor (d) a fuse
  21. 21.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a buzzer (c) a resistor (d) a diode
  22. 22.True or false: an LED lets current go one way. (a) False (b) True
  23. 23.🧩 Which component beeps for an alarm? (a) buzzer (b) transistor (c) diode (d) potentiometer
  24. 24.🧩 Which component glows using little power? (a) capacitor (b) resistor (c) potentiometer (d) LED
  25. 25.What does an LDR do? (a) blows if current is high (b) stores a little charge (c) senses how bright it is (d) boosts a small signal
  26. 26.True or false: an LED boosts a small signal. (a) False (b) True
  27. 27.True or false: a motor turns a fan or wheels. (a) False (b) True
  28. 28.True or false: a diode limits the current. (a) True (b) False
  29. 29.What does a fuse do? (a) senses how hot it is (b) limits the current (c) beeps for an alarm (d) blows if current is high
  30. 30.True or false: a potentiometer limits the current. (a) True (b) False
  31. 31.True or false: a buzzer beeps for an alarm. (a) False (b) True
  32. 32.🧩 Which component makes a beeping sound? (a) motor (b) buzzer (c) thermistor (d) LED
  33. 33.True or false: a motor makes things spin. (a) True (b) False
  34. 34.True or false: a capacitor stores a little charge. (a) True (b) False
  35. 35.True or false: a transistor glows using little power. (a) False (b) True
  36. 36.🧩 Which component senses how bright it is? (a) potentiometer (b) diode (c) LDR (d) resistor
  37. 37.True or false: a capacitor smooths a wobbly supply. (a) True (b) False
  38. 38.What does a resistor do? (a) stores a little charge (b) beeps for an alarm (c) limits the current (d) turns a fan or wheels
  39. 39.True or false: a motor limits the current. (a) False (b) True
  40. 40.True or false: a resistor has coloured bands. (a) True (b) False

Answer key

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

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