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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 479 · 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 smooths a wobbly supply? (a) capacitor (b) LDR (c) thermistor (d) resistor
  2. 2.True or false: a buzzer beeps for an alarm. (a) False (b) True
  3. 3.What does a diode do? (a) is a resistance knob (b) stores a little charge (c) lets current go one way (d) blows if current is high
  4. 4.🧩 Which component beeps for an alarm? (a) LED (b) buzzer (c) potentiometer (d) motor
  5. 5.🧩 A capacitor in a circuit can … (a) spin a wheel (b) make light (c) measure heat (d) store charge briefly
  6. 6.What does a buzzer do? (a) smooths a wobbly supply (b) stores a little charge (c) makes a beeping sound (d) turns a fan or wheels
  7. 7.🧩 Which component boosts a small signal? (a) LDR (b) diode (c) transistor (d) potentiometer
  8. 8.🧩 Which component makes things spin? (a) motor (b) transistor (c) diode (d) fuse
  9. 9.🧩 Which part changes electrical energy into movement? (a) a fuse (b) an LED (c) a motor (d) a resistor
  10. 10.🧩 Which component has coloured bands? (a) capacitor (b) LED (c) resistor (d) buzzer
  11. 11.🧩 Which component glows using little power? (a) diode (b) thermistor (c) resistor (d) LED
  12. 12.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a diode (c) a buzzer (d) a resistor
  13. 13.🧩 Which component limits the current? (a) LDR (b) resistor (c) buzzer (d) capacitor
  14. 14.What does a resistor do? (a) makes things spin (b) lets current go one way (c) has coloured bands (d) is a resistance knob
  15. 15.What does a thermistor do? (a) senses how hot it is (b) blows if current is high (c) is a resistance knob (d) limits the current
  16. 16.🧩 Which component is a resistance knob? (a) motor (b) potentiometer (c) LED (d) buzzer
  17. 17.What does a motor do? (a) turns a fan or wheels (b) has coloured bands (c) blows if current is high (d) boosts a small signal
  18. 18.What does an LDR do? (a) makes a beeping sound (b) turns a fan or wheels (c) stores a little charge (d) senses how bright it is
  19. 19.True or false: a motor senses how bright it is. (a) False (b) True
  20. 20.What does a transistor do? (a) senses how hot it is (b) beeps for an alarm (c) blows if current is high (d) boosts a small signal
  21. 21.True or false: a resistor has coloured bands. (a) True (b) False
  22. 22.True or false: a motor makes things spin. (a) False (b) True
  23. 23.🧩 Which component makes a beeping sound? (a) potentiometer (b) capacitor (c) fuse (d) buzzer
  24. 24.True or false: a motor is a resistance knob. (a) False (b) True
  25. 25.🧩 Which component lets current go one way? (a) buzzer (b) diode (c) LDR (d) LED
  26. 26.True or false: a potentiometer is a resistance knob. (a) True (b) False
  27. 27.🧩 Which component senses how bright it is? (a) transistor (b) resistor (c) LDR (d) buzzer
  28. 28.True or false: a buzzer smooths a wobbly supply. (a) True (b) False
  29. 29.True or false: a motor has coloured bands. (a) True (b) False
  30. 30.🧩 Which component stores a little charge? (a) motor (b) capacitor (c) LDR (d) LED
  31. 31.True or false: a capacitor senses how hot it is. (a) False (b) True
  32. 32.What does a motor do? (a) makes things spin (b) is a resistance knob (c) senses how hot it is (d) beeps for an alarm
  33. 33.True or false: a resistor limits the current. (a) True (b) False
  34. 34.True or false: a motor turns a fan or wheels. (a) False (b) True
  35. 35.🧩 Which component senses how hot it is? (a) potentiometer (b) thermistor (c) fuse (d) transistor
  36. 36.True or false: a motor lets current go one way. (a) True (b) False
  37. 37.What does an LED do? (a) has coloured bands (b) smooths a wobbly supply (c) beeps for an alarm (d) glows using little power
  38. 38.True or false: a transistor boosts a small signal. (a) True (b) False
  39. 39.What does a fuse do? (a) beeps for an alarm (b) has coloured bands (c) blows if current is high (d) glows using little power
  40. 40.True or false: a motor stores a little charge. (a) False (b) True

Answer key

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

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