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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 255 · 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 an LED do? (a) glows using little power (b) is a resistance knob (c) limits the current (d) senses how hot it is
  2. 2.🧩 Which part changes electrical energy into movement? (a) a resistor (b) a motor (c) an LED (d) a fuse
  3. 3.True or false: a resistor makes a beeping sound. (a) False (b) True
  4. 4.True or false: a potentiometer glows using little power. (a) True (b) False
  5. 5.🧩 A capacitor in a circuit can … (a) spin a wheel (b) store charge briefly (c) measure heat (d) make light
  6. 6.🧩 Which component senses how hot it is? (a) fuse (b) thermistor (c) LDR (d) potentiometer
  7. 7.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a diode (c) a buzzer (d) a resistor
  8. 8.What does a transistor do? (a) is a resistance knob (b) senses how bright it is (c) glows using little power (d) boosts a small signal
  9. 9.What does a fuse do? (a) lets current go one way (b) blows if current is high (c) limits the current (d) stores a little charge
  10. 10.True or false: a thermistor beeps for an alarm. (a) False (b) True
  11. 11.🧩 Which component limits the current? (a) diode (b) resistor (c) motor (d) LED
  12. 12.🧩 Which component has coloured bands? (a) LDR (b) capacitor (c) resistor (d) transistor
  13. 13.True or false: an LED beeps for an alarm. (a) False (b) True
  14. 14.🧩 Which component senses how bright it is? (a) capacitor (b) LDR (c) buzzer (d) motor
  15. 15.🧩 Which component makes a beeping sound? (a) buzzer (b) resistor (c) LED (d) capacitor
  16. 16.🧩 Which component glows using little power? (a) diode (b) LED (c) buzzer (d) fuse
  17. 17.🧩 Which component turns a fan or wheels? (a) thermistor (b) LDR (c) resistor (d) motor
  18. 18.What does a thermistor do? (a) smooths a wobbly supply (b) senses how hot it is (c) senses how bright it is (d) blows if current is high
  19. 19.True or false: a buzzer beeps for an alarm. (a) True (b) False
  20. 20.🧩 Which component stores a little charge? (a) motor (b) fuse (c) diode (d) capacitor
  21. 21.True or false: a diode boosts a small signal. (a) False (b) True
  22. 22.🧩 Which component makes things spin? (a) motor (b) diode (c) buzzer (d) thermistor
  23. 23.🧩 Which component is a resistance knob? (a) thermistor (b) potentiometer (c) capacitor (d) motor
  24. 24.What does a buzzer do? (a) limits the current (b) senses how bright it is (c) beeps for an alarm (d) blows if current is high
  25. 25.True or false: a fuse limits the current. (a) False (b) True
  26. 26.True or false: a thermistor blows if current is high. (a) False (b) True
  27. 27.What does a potentiometer do? (a) makes things spin (b) beeps for an alarm (c) blows if current is high (d) is a resistance knob
  28. 28.True or false: a motor makes things spin. (a) False (b) True
  29. 29.🧩 Which component boosts a small signal? (a) thermistor (b) transistor (c) buzzer (d) LED
  30. 30.What does a capacitor do? (a) smooths a wobbly supply (b) turns a fan or wheels (c) limits the current (d) makes things spin
  31. 31.True or false: a buzzer makes things spin. (a) False (b) True
  32. 32.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
  33. 33.🧩 Which component lets current go one way? (a) diode (b) fuse (c) transistor (d) LED
  34. 34.True or false: a capacitor blows if current is high. (a) True (b) False
  35. 35.True or false: a diode senses how bright it is. (a) False (b) True
  36. 36.True or false: a fuse lets current go one way. (a) False (b) True
  37. 37.True or false: a diode lets current go one way. (a) False (b) True
  38. 38.What does a capacitor do? (a) senses how bright it is (b) stores a little charge (c) blows if current is high (d) turns a fan or wheels
  39. 39.🧩 Which component beeps for an alarm? (a) buzzer (b) transistor (c) motor (d) capacitor
  40. 40.What does a buzzer do? (a) boosts a small signal (b) makes a beeping sound (c) turns a fan or wheels (d) has coloured bands

Answer key

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

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