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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 685 · 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 resistor (c) a diode (d) a buzzer
  2. 2.What does a motor do? (a) makes things spin (b) glows using little power (c) beeps for an alarm (d) makes a beeping sound
  3. 3.What does a potentiometer do? (a) limits the current (b) has coloured bands (c) lets current go one way (d) is a resistance knob
  4. 4.What does a resistor do? (a) glows using little power (b) limits the current (c) smooths a wobbly supply (d) makes things spin
  5. 5.🧩 Which component stores a little charge? (a) buzzer (b) fuse (c) thermistor (d) capacitor
  6. 6.🧩 A capacitor in a circuit can … (a) measure heat (b) store charge briefly (c) spin a wheel (d) make light
  7. 7.True or false: a thermistor makes things spin. (a) False (b) True
  8. 8.What does a capacitor do? (a) stores a little charge (b) makes things spin (c) turns a fan or wheels (d) lets current go one way
  9. 9.True or false: a motor makes things spin. (a) True (b) False
  10. 10.True or false: a diode has coloured bands. (a) True (b) False
  11. 11.🧩 Which component boosts a small signal? (a) transistor (b) motor (c) LED (d) diode
  12. 12.True or false: a fuse blows if current is high. (a) True (b) False
  13. 13.🧩 Which part changes electrical energy into movement? (a) a motor (b) a resistor (c) a fuse (d) an LED
  14. 14.🧩 Which component is a resistance knob? (a) potentiometer (b) fuse (c) buzzer (d) diode
  15. 15.True or false: a transistor boosts a small signal. (a) True (b) False
  16. 16.🧩 Which component makes a beeping sound? (a) motor (b) capacitor (c) buzzer (d) transistor
  17. 17.What does a buzzer do? (a) limits the current (b) makes things spin (c) senses how bright it is (d) beeps for an alarm
  18. 18.True or false: a fuse smooths a wobbly supply. (a) True (b) False
  19. 19.True or false: a motor turns a fan or wheels. (a) False (b) True
  20. 20.What does a diode do? (a) limits the current (b) has coloured bands (c) lets current go one way (d) senses how bright it is
  21. 21.True or false: a resistor limits the current. (a) False (b) True
  22. 22.🧩 Which component smooths a wobbly supply? (a) potentiometer (b) capacitor (c) LED (d) fuse
  23. 23.True or false: a capacitor makes things spin. (a) True (b) False
  24. 24.🧩 Which component senses how bright it is? (a) potentiometer (b) thermistor (c) LDR (d) buzzer
  25. 25.What does a capacitor do? (a) blows if current is high (b) smooths a wobbly supply (c) turns a fan or wheels (d) limits the current
  26. 26.🧩 Which component lets current go one way? (a) diode (b) LED (c) potentiometer (d) LDR
  27. 27.🧩 Which component senses how hot it is? (a) resistor (b) buzzer (c) potentiometer (d) thermistor
  28. 28.🧩 Which component has coloured bands? (a) resistor (b) buzzer (c) capacitor (d) potentiometer
  29. 29.True or false: a potentiometer stores a little charge. (a) True (b) False
  30. 30.What does an LDR do? (a) makes things spin (b) blows if current is high (c) senses how bright it is (d) makes a beeping sound
  31. 31.🧩 Which component makes things spin? (a) motor (b) LDR (c) buzzer (d) thermistor
  32. 32.What does a thermistor do? (a) senses how hot it is (b) is a resistance knob (c) smooths a wobbly supply (d) lets current go one way
  33. 33.True or false: a diode lets current go one way. (a) True (b) False
  34. 34.True or false: a buzzer smooths a wobbly supply. (a) True (b) False
  35. 35.True or false: a diode senses how bright it is. (a) True (b) False
  36. 36.True or false: a buzzer makes a beeping sound. (a) True (b) False
  37. 37.True or false: a potentiometer smooths a wobbly supply. (a) True (b) False
  38. 38.True or false: a buzzer turns a fan or wheels. (a) False (b) True
  39. 39.🧩 Which component turns a fan or wheels? (a) LED (b) fuse (c) transistor (d) motor
  40. 40.What does a motor do? (a) makes a beeping sound (b) turns a fan or wheels (c) beeps for an alarm (d) smooths a wobbly supply

Answer key

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

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