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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 677 · 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 movement? (a) a fuse (b) a resistor (c) a motor (d) an LED
  2. 2.🧩 Which part changes electrical energy into sound? (a) a buzzer (b) a resistor (c) a diode (d) a capacitor
  3. 3.🧩 A capacitor in a circuit can … (a) measure heat (b) spin a wheel (c) store charge briefly (d) make light
  4. 4.🧩 Which component boosts a small signal? (a) transistor (b) fuse (c) thermistor (d) LDR
  5. 5.🧩 Which component lets current go one way? (a) diode (b) motor (c) potentiometer (d) capacitor
  6. 6.What does a potentiometer do? (a) is a resistance knob (b) has coloured bands (c) makes things spin (d) senses how bright it is
  7. 7.True or false: a diode senses how bright it is. (a) False (b) True
  8. 8.True or false: a fuse blows if current is high. (a) False (b) True
  9. 9.True or false: a resistor boosts a small signal. (a) True (b) False
  10. 10.🧩 Which component has coloured bands? (a) resistor (b) thermistor (c) buzzer (d) LED
  11. 11.What does an LDR do? (a) has coloured bands (b) makes a beeping sound (c) senses how bright it is (d) beeps for an alarm
  12. 12.True or false: a fuse limits the current. (a) False (b) True
  13. 13.What does a diode do? (a) has coloured bands (b) smooths a wobbly supply (c) lets current go one way (d) stores a little charge
  14. 14.True or false: a thermistor smooths a wobbly supply. (a) True (b) False
  15. 15.🧩 Which component turns a fan or wheels? (a) thermistor (b) fuse (c) capacitor (d) motor
  16. 16.True or false: a diode smooths a wobbly supply. (a) False (b) True
  17. 17.🧩 Which component makes a beeping sound? (a) LDR (b) buzzer (c) fuse (d) thermistor
  18. 18.What does a buzzer do? (a) is a resistance knob (b) turns a fan or wheels (c) lets current go one way (d) beeps for an alarm
  19. 19.🧩 Which component is a resistance knob? (a) LDR (b) potentiometer (c) buzzer (d) transistor
  20. 20.What does a motor do? (a) smooths a wobbly supply (b) senses how hot it is (c) makes things spin (d) lets current go one way
  21. 21.True or false: a buzzer makes a beeping sound. (a) True (b) False
  22. 22.True or false: a diode lets current go one way. (a) True (b) False
  23. 23.True or false: an LDR senses how bright it is. (a) True (b) False
  24. 24.True or false: a resistor has coloured bands. (a) False (b) True
  25. 25.🧩 Which component makes things spin? (a) potentiometer (b) motor (c) LED (d) buzzer
  26. 26.True or false: a potentiometer is a resistance knob. (a) False (b) True
  27. 27.True or false: a motor turns a fan or wheels. (a) True (b) False
  28. 28.What does a fuse do? (a) lets current go one way (b) beeps for an alarm (c) blows if current is high (d) is a resistance knob
  29. 29.True or false: a diode glows using little power. (a) True (b) False
  30. 30.True or false: an LED makes a beeping sound. (a) True (b) False
  31. 31.🧩 Which component smooths a wobbly supply? (a) buzzer (b) thermistor (c) capacitor (d) fuse
  32. 32.True or false: a resistor glows using little power. (a) True (b) False
  33. 33.🧩 Which component limits the current? (a) thermistor (b) transistor (c) capacitor (d) resistor
  34. 34.🧩 Which component stores a little charge? (a) capacitor (b) motor (c) fuse (d) resistor
  35. 35.🧩 Which component glows using little power? (a) motor (b) LED (c) resistor (d) buzzer
  36. 36.True or false: an LDR glows using little power. (a) False (b) True
  37. 37.What does a resistor do? (a) boosts a small signal (b) has coloured bands (c) stores a little charge (d) blows if current is high
  38. 38.What does a motor do? (a) senses how bright it is (b) senses how hot it is (c) is a resistance knob (d) turns a fan or wheels
  39. 39.True or false: a buzzer is a resistance knob. (a) True (b) False
  40. 40.True or false: an LED makes things spin. (a) False (b) True

Answer key

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

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