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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 226 · 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 resistor (c) a buzzer (d) a capacitor
  2. 2.🧩 Which component lets current go one way? (a) LDR (b) fuse (c) diode (d) capacitor
  3. 3.🧩 Which component senses how hot it is? (a) diode (b) LED (c) potentiometer (d) thermistor
  4. 4.🧩 Which component turns a fan or wheels? (a) buzzer (b) capacitor (c) motor (d) thermistor
  5. 5.🧩 Which component beeps for an alarm? (a) fuse (b) LDR (c) buzzer (d) diode
  6. 6.True or false: a fuse blows if current is high. (a) False (b) True
  7. 7.True or false: a motor turns a fan or wheels. (a) False (b) True
  8. 8.🧩 Which component glows using little power? (a) thermistor (b) capacitor (c) LED (d) transistor
  9. 9.🧩 Which component senses how bright it is? (a) motor (b) thermistor (c) buzzer (d) LDR
  10. 10.True or false: a diode makes things spin. (a) True (b) False
  11. 11.What does a motor do? (a) lets current go one way (b) turns a fan or wheels (c) smooths a wobbly supply (d) boosts a small signal
  12. 12.True or false: a fuse lets current go one way. (a) True (b) False
  13. 13.True or false: a motor makes things spin. (a) True (b) False
  14. 14.True or false: a transistor lets current go one way. (a) False (b) True
  15. 15.What does a capacitor do? (a) has coloured bands (b) boosts a small signal (c) senses how bright it is (d) stores a little charge
  16. 16.True or false: a fuse turns a fan or wheels. (a) False (b) True
  17. 17.True or false: a potentiometer is a resistance knob. (a) True (b) False
  18. 18.🧩 Which component smooths a wobbly supply? (a) capacitor (b) motor (c) resistor (d) buzzer
  19. 19.What does an LDR do? (a) makes a beeping sound (b) limits the current (c) has coloured bands (d) senses how bright it is
  20. 20.🧩 Which part changes electrical energy into movement? (a) a fuse (b) a motor (c) a resistor (d) an LED
  21. 21.What does a buzzer do? (a) beeps for an alarm (b) boosts a small signal (c) smooths a wobbly supply (d) makes things spin
  22. 22.True or false: a potentiometer smooths a wobbly supply. (a) False (b) True
  23. 23.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
  24. 24.What does a buzzer do? (a) senses how bright it is (b) makes a beeping sound (c) limits the current (d) stores a little charge
  25. 25.🧩 Which component makes things spin? (a) capacitor (b) thermistor (c) transistor (d) motor
  26. 26.🧩 A capacitor in a circuit can … (a) spin a wheel (b) make light (c) measure heat (d) store charge briefly
  27. 27.🧩 Which component boosts a small signal? (a) buzzer (b) LED (c) resistor (d) transistor
  28. 28.True or false: a motor senses how bright it is. (a) True (b) False
  29. 29.True or false: a thermistor senses how hot it is. (a) False (b) True
  30. 30.What does an LED do? (a) makes a beeping sound (b) glows using little power (c) boosts a small signal (d) beeps for an alarm
  31. 31.🧩 Which component has coloured bands? (a) buzzer (b) resistor (c) diode (d) fuse
  32. 32.🧩 Which component stores a little charge? (a) motor (b) fuse (c) capacitor (d) buzzer
  33. 33.🧩 Which component makes a beeping sound? (a) resistor (b) fuse (c) buzzer (d) LED
  34. 34.True or false: a motor senses how hot it is. (a) True (b) False
  35. 35.What does a thermistor do? (a) boosts a small signal (b) makes a beeping sound (c) senses how hot it is (d) glows using little power
  36. 36.True or false: an LDR smooths a wobbly supply. (a) False (b) True
  37. 37.What does a resistor do? (a) stores a little charge (b) has coloured bands (c) makes a beeping sound (d) blows if current is high
  38. 38.What does a diode do? (a) lets current go one way (b) is a resistance knob (c) boosts a small signal (d) makes a beeping sound
  39. 39.True or false: a capacitor makes a beeping sound. (a) True (b) False
  40. 40.True or false: a resistor limits the current. (a) False (b) True

Answer key

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

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