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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 616 · 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.What does a buzzer do? (a) turns a fan or wheels (b) makes things spin (c) is a resistance knob (d) beeps for an alarm
  2. 2.🧩 Which part changes electrical energy into movement? (a) an LED (b) a fuse (c) a resistor (d) a motor
  3. 3.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a capacitor (c) a buzzer (d) a diode
  4. 4.🧩 Which component smooths a wobbly supply? (a) resistor (b) capacitor (c) LED (d) diode
  5. 5.🧩 Which component makes things spin? (a) transistor (b) thermistor (c) motor (d) LED
  6. 6.🧩 Which component stores a little charge? (a) resistor (b) motor (c) capacitor (d) LDR
  7. 7.What does a capacitor do? (a) limits the current (b) glows using little power (c) stores a little charge (d) makes a beeping sound
  8. 8.🧩 Which component turns a fan or wheels? (a) resistor (b) capacitor (c) diode (d) motor
  9. 9.🧩 A capacitor in a circuit can … (a) measure heat (b) spin a wheel (c) store charge briefly (d) make light
  10. 10.🧩 Which component glows using little power? (a) resistor (b) LED (c) motor (d) thermistor
  11. 11.True or false: a thermistor smooths a wobbly supply. (a) True (b) False
  12. 12.What does a transistor do? (a) senses how hot it is (b) boosts a small signal (c) is a resistance knob (d) beeps for an alarm
  13. 13.🧩 Which component boosts a small signal? (a) transistor (b) buzzer (c) thermistor (d) resistor
  14. 14.What does a resistor do? (a) limits the current (b) stores a little charge (c) boosts a small signal (d) makes a beeping sound
  15. 15.True or false: a thermistor makes a beeping sound. (a) True (b) False
  16. 16.What does a resistor do? (a) blows if current is high (b) has coloured bands (c) smooths a wobbly supply (d) stores a little charge
  17. 17.What does a potentiometer do? (a) smooths a wobbly supply (b) makes a beeping sound (c) beeps for an alarm (d) is a resistance knob
  18. 18.🧩 Which component lets current go one way? (a) thermistor (b) resistor (c) buzzer (d) diode
  19. 19.What does a fuse do? (a) boosts a small signal (b) blows if current is high (c) senses how hot it is (d) limits the current
  20. 20.🧩 Which component makes a beeping sound? (a) resistor (b) diode (c) LDR (d) buzzer
  21. 21.True or false: a diode senses how bright it is. (a) True (b) False
  22. 22.What does an LDR do? (a) has coloured bands (b) senses how bright it is (c) makes a beeping sound (d) glows using little power
  23. 23.True or false: a fuse makes a beeping sound. (a) True (b) False
  24. 24.🧩 Which component senses how bright it is? (a) thermistor (b) LDR (c) buzzer (d) capacitor
  25. 25.🧩 Which component senses how hot it is? (a) thermistor (b) diode (c) motor (d) capacitor
  26. 26.What does a thermistor do? (a) limits the current (b) lets current go one way (c) senses how hot it is (d) makes a beeping sound
  27. 27.🧩 Which component is a resistance knob? (a) diode (b) potentiometer (c) LED (d) motor
  28. 28.True or false: an LDR senses how bright it is. (a) True (b) False
  29. 29.What does a buzzer do? (a) senses how bright it is (b) has coloured bands (c) senses how hot it is (d) makes a beeping sound
  30. 30.True or false: a fuse stores a little charge. (a) True (b) False
  31. 31.What does a diode do? (a) lets current go one way (b) glows using little power (c) senses how bright it is (d) turns a fan or wheels
  32. 32.True or false: a resistor limits the current. (a) True (b) False
  33. 33.True or false: a potentiometer blows if current is high. (a) True (b) False
  34. 34.True or false: an LDR stores a little charge. (a) True (b) False
  35. 35.True or false: a buzzer beeps for an alarm. (a) False (b) True
  36. 36.True or false: a fuse blows if current is high. (a) True (b) False
  37. 37.True or false: a potentiometer limits the current. (a) False (b) True
  38. 38.🧩 Which component has coloured bands? (a) resistor (b) diode (c) LDR (d) thermistor
  39. 39.True or false: a transistor boosts a small signal. (a) False (b) True
  40. 40.True or false: a thermistor limits the current. (a) False (b) True

Answer key

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

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