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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 377 · 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 limits the current? (a) buzzer (b) thermistor (c) resistor (d) LDR
  2. 2.🧩 Which component has coloured bands? (a) buzzer (b) thermistor (c) diode (d) resistor
  3. 3.🧩 Which component senses how bright it is? (a) motor (b) resistor (c) LDR (d) potentiometer
  4. 4.🧩 Which component boosts a small signal? (a) LDR (b) potentiometer (c) transistor (d) motor
  5. 5.What does a diode do? (a) beeps for an alarm (b) stores a little charge (c) lets current go one way (d) senses how bright it is
  6. 6.🧩 Which component smooths a wobbly supply? (a) transistor (b) capacitor (c) thermistor (d) buzzer
  7. 7.True or false: a fuse blows if current is high. (a) True (b) False
  8. 8.🧩 Which component senses how hot it is? (a) LED (b) LDR (c) resistor (d) thermistor
  9. 9.🧩 Which component beeps for an alarm? (a) motor (b) diode (c) buzzer (d) thermistor
  10. 10.What does a thermistor do? (a) is a resistance knob (b) senses how bright it is (c) senses how hot it is (d) makes a beeping sound
  11. 11.True or false: a transistor boosts a small signal. (a) True (b) False
  12. 12.🧩 Which component stores a little charge? (a) diode (b) capacitor (c) buzzer (d) resistor
  13. 13.True or false: a potentiometer senses how hot it is. (a) False (b) True
  14. 14.What does an LED do? (a) lets current go one way (b) senses how hot it is (c) turns a fan or wheels (d) glows using little power
  15. 15.What does a resistor do? (a) blows if current is high (b) senses how bright it is (c) has coloured bands (d) turns a fan or wheels
  16. 16.True or false: a potentiometer limits the current. (a) True (b) False
  17. 17.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a capacitor (c) a diode (d) a buzzer
  18. 18.True or false: a motor turns a fan or wheels. (a) True (b) False
  19. 19.🧩 A capacitor in a circuit can … (a) spin a wheel (b) store charge briefly (c) measure heat (d) make light
  20. 20.🧩 Which part changes electrical energy into movement? (a) a resistor (b) a motor (c) a fuse (d) an LED
  21. 21.What does a capacitor do? (a) boosts a small signal (b) stores a little charge (c) beeps for an alarm (d) lets current go one way
  22. 22.True or false: a motor makes things spin. (a) True (b) False
  23. 23.True or false: a diode smooths a wobbly supply. (a) True (b) False
  24. 24.🧩 Which component makes a beeping sound? (a) potentiometer (b) LED (c) transistor (d) buzzer
  25. 25.What does a buzzer do? (a) makes a beeping sound (b) boosts a small signal (c) makes things spin (d) is a resistance knob
  26. 26.What does an LDR do? (a) smooths a wobbly supply (b) limits the current (c) lets current go one way (d) senses how bright it is
  27. 27.True or false: an LDR blows if current is high. (a) False (b) True
  28. 28.True or false: a buzzer is a resistance knob. (a) True (b) False
  29. 29.True or false: a resistor smooths a wobbly supply. (a) True (b) False
  30. 30.What does a motor do? (a) has coloured bands (b) turns a fan or wheels (c) limits the current (d) lets current go one way
  31. 31.True or false: a fuse senses how bright it is. (a) False (b) True
  32. 32.True or false: a diode lets current go one way. (a) True (b) False
  33. 33.🧩 Which component glows using little power? (a) diode (b) potentiometer (c) LED (d) capacitor
  34. 34.True or false: a transistor beeps for an alarm. (a) True (b) False
  35. 35.What does a potentiometer do? (a) stores a little charge (b) turns a fan or wheels (c) limits the current (d) is a resistance knob
  36. 36.True or false: a thermistor senses how hot it is. (a) False (b) True
  37. 37.True or false: a thermistor smooths a wobbly supply. (a) True (b) False
  38. 38.🧩 Which component turns a fan or wheels? (a) buzzer (b) capacitor (c) transistor (d) motor
  39. 39.What does a capacitor do? (a) makes things spin (b) senses how bright it is (c) makes a beeping sound (d) smooths a wobbly supply
  40. 40.True or false: an LDR smooths a wobbly supply. (a) False (b) True

Answer key

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

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