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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 529 · 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 component boosts a small signal? (a) resistor (b) buzzer (c) transistor (d) LED
  2. 2.🧩 Which component makes things spin? (a) fuse (b) motor (c) potentiometer (d) capacitor
  3. 3.True or false: a diode turns a fan or wheels. (a) False (b) True
  4. 4.🧩 Which component limits the current? (a) LED (b) diode (c) motor (d) resistor
  5. 5.What does a diode do? (a) limits the current (b) makes things spin (c) lets current go one way (d) has coloured bands
  6. 6.🧩 Which part changes electrical energy into sound? (a) a buzzer (b) a resistor (c) a diode (d) a capacitor
  7. 7.🧩 A capacitor in a circuit can … (a) spin a wheel (b) make light (c) measure heat (d) store charge briefly
  8. 8.What does a potentiometer do? (a) has coloured bands (b) is a resistance knob (c) senses how hot it is (d) glows using little power
  9. 9.🧩 Which component lets current go one way? (a) thermistor (b) transistor (c) diode (d) motor
  10. 10.True or false: a thermistor senses how hot it is. (a) False (b) True
  11. 11.🧩 Which part changes electrical energy into movement? (a) an LED (b) a motor (c) a resistor (d) a fuse
  12. 12.True or false: a thermistor lets current go one way. (a) False (b) True
  13. 13.What does a thermistor do? (a) makes a beeping sound (b) senses how hot it is (c) boosts a small signal (d) lets current go one way
  14. 14.True or false: a resistor senses how bright it is. (a) False (b) True
  15. 15.🧩 Which component glows using little power? (a) buzzer (b) resistor (c) LDR (d) LED
  16. 16.True or false: a motor turns a fan or wheels. (a) False (b) True
  17. 17.🧩 Which component makes a beeping sound? (a) diode (b) LDR (c) buzzer (d) resistor
  18. 18.What does a resistor do? (a) makes a beeping sound (b) beeps for an alarm (c) senses how bright it is (d) limits the current
  19. 19.🧩 Which component senses how bright it is? (a) thermistor (b) motor (c) LDR (d) LED
  20. 20.🧩 Which component beeps for an alarm? (a) buzzer (b) resistor (c) capacitor (d) LED
  21. 21.What does a transistor do? (a) blows if current is high (b) boosts a small signal (c) beeps for an alarm (d) lets current go one way
  22. 22.What does an LDR do? (a) smooths a wobbly supply (b) senses how bright it is (c) turns a fan or wheels (d) has coloured bands
  23. 23.What does a fuse do? (a) smooths a wobbly supply (b) has coloured bands (c) blows if current is high (d) stores a little charge
  24. 24.What does a buzzer do? (a) turns a fan or wheels (b) has coloured bands (c) makes things spin (d) makes a beeping sound
  25. 25.🧩 Which component senses how hot it is? (a) motor (b) capacitor (c) thermistor (d) resistor
  26. 26.True or false: a transistor limits the current. (a) True (b) False
  27. 27.True or false: a motor glows using little power. (a) False (b) True
  28. 28.🧩 Which component stores a little charge? (a) capacitor (b) transistor (c) buzzer (d) fuse
  29. 29.True or false: a transistor boosts a small signal. (a) True (b) False
  30. 30.True or false: a diode lets current go one way. (a) True (b) False
  31. 31.🧩 Which component smooths a wobbly supply? (a) LDR (b) capacitor (c) motor (d) resistor
  32. 32.True or false: a buzzer beeps for an alarm. (a) False (b) True
  33. 33.True or false: an LED lets current go one way. (a) False (b) True
  34. 34.True or false: a resistor beeps for an alarm. (a) True (b) False
  35. 35.True or false: a potentiometer smooths a wobbly supply. (a) True (b) False
  36. 36.True or false: an LED has coloured bands. (a) True (b) False
  37. 37.True or false: an LDR senses how bright it is. (a) True (b) False
  38. 38.What does an LED do? (a) glows using little power (b) limits the current (c) smooths a wobbly supply (d) beeps for an alarm
  39. 39.True or false: a buzzer makes a beeping sound. (a) True (b) False
  40. 40.True or false: a diode smooths a wobbly supply. (a) False (b) True

Answer key

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

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