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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 242 · 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 capacitor (b) a buzzer (c) a diode (d) a resistor
  2. 2.🧩 Which component stores a little charge? (a) diode (b) capacitor (c) resistor (d) motor
  3. 3.What does a buzzer do? (a) smooths a wobbly supply (b) makes a beeping sound (c) lets current go one way (d) has coloured bands
  4. 4.🧩 Which part changes electrical energy into movement? (a) a resistor (b) an LED (c) a motor (d) a fuse
  5. 5.🧩 Which component beeps for an alarm? (a) fuse (b) potentiometer (c) buzzer (d) motor
  6. 6.What does a diode do? (a) has coloured bands (b) lets current go one way (c) makes things spin (d) limits the current
  7. 7.What does a fuse do? (a) senses how hot it is (b) makes things spin (c) turns a fan or wheels (d) blows if current is high
  8. 8.True or false: a thermistor turns a fan or wheels. (a) True (b) False
  9. 9.🧩 Which component senses how bright it is? (a) fuse (b) LDR (c) transistor (d) diode
  10. 10.True or false: a thermistor smooths a wobbly supply. (a) True (b) False
  11. 11.🧩 A capacitor in a circuit can … (a) spin a wheel (b) measure heat (c) store charge briefly (d) make light
  12. 12.True or false: a buzzer makes things spin. (a) False (b) True
  13. 13.🧩 Which component lets current go one way? (a) diode (b) thermistor (c) buzzer (d) fuse
  14. 14.True or false: an LDR senses how bright it is. (a) False (b) True
  15. 15.🧩 Which component turns a fan or wheels? (a) motor (b) resistor (c) LED (d) LDR
  16. 16.What does an LED do? (a) is a resistance knob (b) glows using little power (c) limits the current (d) boosts a small signal
  17. 17.True or false: an LED glows using little power. (a) True (b) False
  18. 18.What does a buzzer do? (a) senses how bright it is (b) beeps for an alarm (c) glows using little power (d) is a resistance knob
  19. 19.True or false: a fuse beeps for an alarm. (a) True (b) False
  20. 20.🧩 Which component makes a beeping sound? (a) transistor (b) thermistor (c) buzzer (d) potentiometer
  21. 21.🧩 Which component glows using little power? (a) transistor (b) LED (c) thermistor (d) fuse
  22. 22.🧩 Which component makes things spin? (a) LED (b) transistor (c) diode (d) motor
  23. 23.🧩 Which component limits the current? (a) potentiometer (b) motor (c) thermistor (d) resistor
  24. 24.True or false: a thermistor senses how hot it is. (a) False (b) True
  25. 25.🧩 Which component has coloured bands? (a) resistor (b) motor (c) capacitor (d) fuse
  26. 26.True or false: a transistor boosts a small signal. (a) True (b) False
  27. 27.True or false: a fuse blows if current is high. (a) False (b) True
  28. 28.What does a potentiometer do? (a) blows if current is high (b) is a resistance knob (c) makes a beeping sound (d) makes things spin
  29. 29.True or false: a capacitor stores a little charge. (a) False (b) True
  30. 30.🧩 Which component smooths a wobbly supply? (a) capacitor (b) potentiometer (c) resistor (d) LDR
  31. 31.What does a capacitor do? (a) glows using little power (b) smooths a wobbly supply (c) has coloured bands (d) boosts a small signal
  32. 32.🧩 Which component is a resistance knob? (a) LED (b) potentiometer (c) transistor (d) LDR
  33. 33.🧩 Which component senses how hot it is? (a) diode (b) potentiometer (c) transistor (d) thermistor
  34. 34.True or false: a motor turns a fan or wheels. (a) True (b) False
  35. 35.What does a motor do? (a) smooths a wobbly supply (b) lets current go one way (c) is a resistance knob (d) turns a fan or wheels
  36. 36.What does a resistor do? (a) smooths a wobbly supply (b) limits the current (c) boosts a small signal (d) makes things spin
  37. 37.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
  38. 38.True or false: a motor makes things spin. (a) False (b) True
  39. 39.True or false: an LED boosts a small signal. (a) True (b) False
  40. 40.What does a capacitor do? (a) glows using little power (b) stores a little charge (c) has coloured bands (d) boosts a small signal

Answer key

  1. a buzzer
  2. capacitor
  3. makes a beeping sound
  4. a motor
  5. buzzer
  6. lets current go one way
  7. blows if current is high
  8. False
  9. LDR
  10. False
  11. store charge briefly
  12. False
  13. diode
  14. True
  15. motor
  16. glows using little power
  17. True
  18. beeps for an alarm
  19. False
  20. buzzer
  21. LED
  22. motor
  23. resistor
  24. True
  25. resistor
  26. True
  27. True
  28. is a resistance knob
  29. True
  30. capacitor
  31. smooths a wobbly supply
  32. potentiometer
  33. thermistor
  34. True
  35. turns a fan or wheels
  36. limits the current
  37. True
  38. True
  39. False
  40. stores a little charge

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