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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 330 · 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.🧩 Which part changes electrical energy into sound? (a) a diode (b) a capacitor (c) a buzzer (d) a resistor
  2. 2.True or false: an LDR smooths a wobbly supply. (a) False (b) True
  3. 3.What does a resistor do? (a) limits the current (b) senses how bright it is (c) glows using little power (d) stores a little charge
  4. 4.True or false: a motor boosts a small signal. (a) True (b) False
  5. 5.🧩 Which component limits the current? (a) fuse (b) capacitor (c) resistor (d) thermistor
  6. 6.True or false: a potentiometer limits the current. (a) True (b) False
  7. 7.🧩 Which part changes electrical energy into movement? (a) a fuse (b) a resistor (c) an LED (d) a motor
  8. 8.🧩 Which component turns a fan or wheels? (a) LED (b) motor (c) diode (d) transistor
  9. 9.What does a resistor do? (a) has coloured bands (b) glows using little power (c) stores a little charge (d) turns a fan or wheels
  10. 10.What does a buzzer do? (a) stores a little charge (b) has coloured bands (c) makes a beeping sound (d) senses how bright it is
  11. 11.🧩 Which component senses how bright it is? (a) capacitor (b) transistor (c) buzzer (d) LDR
  12. 12.🧩 Which component glows using little power? (a) buzzer (b) potentiometer (c) LED (d) diode
  13. 13.True or false: a transistor blows if current is high. (a) False (b) True
  14. 14.True or false: a motor turns a fan or wheels. (a) False (b) True
  15. 15.True or false: a capacitor boosts a small signal. (a) False (b) True
  16. 16.What does an LED do? (a) smooths a wobbly supply (b) limits the current (c) glows using little power (d) blows if current is high
  17. 17.True or false: a thermistor senses how hot it is. (a) False (b) True
  18. 18.What does a transistor do? (a) turns a fan or wheels (b) glows using little power (c) boosts a small signal (d) senses how bright it is
  19. 19.True or false: a potentiometer is a resistance knob. (a) True (b) False
  20. 20.What does a diode do? (a) senses how hot it is (b) is a resistance knob (c) lets current go one way (d) beeps for an alarm
  21. 21.What does a motor do? (a) senses how hot it is (b) turns a fan or wheels (c) senses how bright it is (d) is a resistance knob
  22. 22.🧩 Which component senses how hot it is? (a) LDR (b) thermistor (c) diode (d) fuse
  23. 23.🧩 Which component stores a little charge? (a) capacitor (b) diode (c) potentiometer (d) transistor
  24. 24.True or false: a thermistor makes a beeping sound. (a) False (b) True
  25. 25.What does a motor do? (a) is a resistance knob (b) lets current go one way (c) stores a little charge (d) makes things spin
  26. 26.True or false: a fuse stores a little charge. (a) True (b) False
  27. 27.True or false: a diode boosts a small signal. (a) True (b) False
  28. 28.True or false: an LDR lets current go one way. (a) False (b) True
  29. 29.🧩 A capacitor in a circuit can … (a) spin a wheel (b) make light (c) measure heat (d) store charge briefly
  30. 30.True or false: a fuse glows using little power. (a) True (b) False
  31. 31.True or false: a resistor has coloured bands. (a) True (b) False
  32. 32.True or false: a diode lets current go one way. (a) True (b) False
  33. 33.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
  34. 34.What does a capacitor do? (a) makes things spin (b) makes a beeping sound (c) smooths a wobbly supply (d) lets current go one way
  35. 35.🧩 Which component makes a beeping sound? (a) transistor (b) motor (c) potentiometer (d) buzzer
  36. 36.🧩 Which component smooths a wobbly supply? (a) capacitor (b) fuse (c) LDR (d) potentiometer
  37. 37.True or false: a diode is a resistance knob. (a) False (b) True
  38. 38.🧩 Which component has coloured bands? (a) capacitor (b) potentiometer (c) motor (d) resistor
  39. 39.🧩 Which component boosts a small signal? (a) LED (b) resistor (c) transistor (d) diode
  40. 40.True or false: a capacitor stores a little charge. (a) True (b) False

Answer key

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

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