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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 627 · 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.What does a potentiometer do? (a) is a resistance knob (b) makes things spin (c) smooths a wobbly supply (d) limits the current
  3. 3.🧩 Which part changes electrical energy into movement? (a) a resistor (b) an LED (c) a motor (d) a fuse
  4. 4.🧩 Which component turns a fan or wheels? (a) motor (b) fuse (c) transistor (d) buzzer
  5. 5.🧩 A capacitor in a circuit can … (a) spin a wheel (b) make light (c) store charge briefly (d) measure heat
  6. 6.🧩 Which component lets current go one way? (a) fuse (b) potentiometer (c) LED (d) diode
  7. 7.🧩 Which component boosts a small signal? (a) buzzer (b) transistor (c) resistor (d) motor
  8. 8.True or false: a fuse makes things spin. (a) True (b) False
  9. 9.What does a buzzer do? (a) boosts a small signal (b) senses how bright it is (c) glows using little power (d) beeps for an alarm
  10. 10.What does a diode do? (a) glows using little power (b) lets current go one way (c) makes a beeping sound (d) makes things spin
  11. 11.🧩 Which component smooths a wobbly supply? (a) thermistor (b) potentiometer (c) resistor (d) capacitor
  12. 12.🧩 Which component has coloured bands? (a) LDR (b) LED (c) fuse (d) resistor
  13. 13.🧩 Which component beeps for an alarm? (a) motor (b) buzzer (c) potentiometer (d) diode
  14. 14.What does a resistor do? (a) makes things spin (b) makes a beeping sound (c) blows if current is high (d) limits the current
  15. 15.True or false: a buzzer makes a beeping sound. (a) True (b) False
  16. 16.True or false: a buzzer makes things spin. (a) False (b) True
  17. 17.🧩 Which component glows using little power? (a) motor (b) LED (c) diode (d) capacitor
  18. 18.What does an LED do? (a) makes things spin (b) senses how bright it is (c) senses how hot it is (d) glows using little power
  19. 19.🧩 Which component blows if current is high? (a) fuse (b) motor (c) diode (d) potentiometer
  20. 20.What does a buzzer do? (a) limits the current (b) makes a beeping sound (c) senses how bright it is (d) stores a little charge
  21. 21.True or false: a thermistor senses how hot it is. (a) True (b) False
  22. 22.True or false: a thermistor lets current go one way. (a) False (b) True
  23. 23.True or false: a fuse has coloured bands. (a) False (b) True
  24. 24.True or false: a resistor limits the current. (a) False (b) True
  25. 25.What does an LDR do? (a) is a resistance knob (b) has coloured bands (c) senses how bright it is (d) glows using little power
  26. 26.What does a thermistor do? (a) glows using little power (b) turns a fan or wheels (c) senses how hot it is (d) has coloured bands
  27. 27.🧩 Which component stores a little charge? (a) thermistor (b) capacitor (c) resistor (d) LDR
  28. 28.What does a capacitor do? (a) stores a little charge (b) is a resistance knob (c) has coloured bands (d) beeps for an alarm
  29. 29.True or false: a capacitor beeps for an alarm. (a) False (b) True
  30. 30.True or false: a capacitor stores a little charge. (a) True (b) False
  31. 31.🧩 Which component makes things spin? (a) LED (b) transistor (c) fuse (d) motor
  32. 32.True or false: a motor blows if current is high. (a) False (b) True
  33. 33.True or false: an LDR senses how bright it is. (a) False (b) True
  34. 34.What does a transistor do? (a) stores a little charge (b) makes things spin (c) makes a beeping sound (d) boosts a small signal
  35. 35.True or false: an LDR lets current go one way. (a) True (b) False
  36. 36.🧩 Which component makes a beeping sound? (a) diode (b) buzzer (c) motor (d) potentiometer
  37. 37.What does a resistor do? (a) has coloured bands (b) glows using little power (c) turns a fan or wheels (d) is a resistance knob
  38. 38.True or false: a transistor boosts a small signal. (a) False (b) True
  39. 39.True or false: a buzzer turns a fan or wheels. (a) False (b) True
  40. 40.True or false: a buzzer boosts a small signal. (a) False (b) True

Answer key

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

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