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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 463 · 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) an LED (c) a motor (d) a resistor
  2. 2.🧩 A capacitor in a circuit can … (a) spin a wheel (b) store charge briefly (c) measure heat (d) make light
  3. 3.🧩 Which part changes electrical energy into sound? (a) a buzzer (b) a resistor (c) a capacitor (d) a diode
  4. 4.🧩 Which component senses how bright it is? (a) motor (b) LDR (c) potentiometer (d) fuse
  5. 5.True or false: a thermistor stores a little charge. (a) True (b) False
  6. 6.🧩 Which component lets current go one way? (a) transistor (b) diode (c) potentiometer (d) motor
  7. 7.🧩 Which component has coloured bands? (a) capacitor (b) LED (c) resistor (d) motor
  8. 8.True or false: a transistor stores a little charge. (a) True (b) False
  9. 9.True or false: a transistor senses how hot it is. (a) False (b) True
  10. 10.True or false: a resistor glows using little power. (a) True (b) False
  11. 11.What does a resistor do? (a) boosts a small signal (b) glows using little power (c) limits the current (d) senses how hot it is
  12. 12.True or false: a buzzer stores a little charge. (a) True (b) False
  13. 13.🧩 Which component blows if current is high? (a) thermistor (b) transistor (c) fuse (d) potentiometer
  14. 14.True or false: a resistor stores a little charge. (a) True (b) False
  15. 15.True or false: an LED blows if current is high. (a) True (b) False
  16. 16.🧩 Which component stores a little charge? (a) LDR (b) buzzer (c) motor (d) capacitor
  17. 17.What does a buzzer do? (a) blows if current is high (b) lets current go one way (c) senses how bright it is (d) makes a beeping sound
  18. 18.🧩 Which component smooths a wobbly supply? (a) transistor (b) capacitor (c) thermistor (d) buzzer
  19. 19.True or false: a thermistor limits the current. (a) True (b) False
  20. 20.True or false: a buzzer boosts a small signal. (a) False (b) True
  21. 21.What does an LDR do? (a) turns a fan or wheels (b) senses how bright it is (c) makes things spin (d) senses how hot it is
  22. 22.True or false: a thermistor senses how hot it is. (a) False (b) True
  23. 23.True or false: a resistor lets current go one way. (a) False (b) True
  24. 24.True or false: a diode senses how bright it is. (a) True (b) False
  25. 25.🧩 Which component turns a fan or wheels? (a) motor (b) buzzer (c) resistor (d) LED
  26. 26.True or false: a potentiometer is a resistance knob. (a) True (b) False
  27. 27.True or false: a resistor has coloured bands. (a) False (b) True
  28. 28.🧩 Which component is a resistance knob? (a) potentiometer (b) transistor (c) resistor (d) LED
  29. 29.True or false: a motor makes things spin. (a) True (b) False
  30. 30.True or false: a buzzer senses how bright it is. (a) False (b) True
  31. 31.What does a fuse do? (a) blows if current is high (b) limits the current (c) makes a beeping sound (d) is a resistance knob
  32. 32.🧩 Which component makes things spin? (a) transistor (b) motor (c) LDR (d) LED
  33. 33.🧩 Which component limits the current? (a) capacitor (b) resistor (c) diode (d) LED
  34. 34.What does a motor do? (a) beeps for an alarm (b) senses how hot it is (c) lets current go one way (d) turns a fan or wheels
  35. 35.What does an LED do? (a) is a resistance knob (b) senses how bright it is (c) senses how hot it is (d) glows using little power
  36. 36.True or false: a buzzer limits the current. (a) False (b) True
  37. 37.True or false: a buzzer lets current go one way. (a) False (b) True
  38. 38.True or false: a motor turns a fan or wheels. (a) True (b) False
  39. 39.🧩 Which component makes a beeping sound? (a) transistor (b) resistor (c) fuse (d) buzzer
  40. 40.What does a diode do? (a) blows if current is high (b) senses how bright it is (c) boosts a small signal (d) lets current go one way

Answer key

  1. a motor
  2. store charge briefly
  3. a buzzer
  4. LDR
  5. False
  6. diode
  7. resistor
  8. False
  9. False
  10. False
  11. limits the current
  12. False
  13. fuse
  14. False
  15. False
  16. capacitor
  17. makes a beeping sound
  18. capacitor
  19. False
  20. False
  21. senses how bright it is
  22. True
  23. False
  24. False
  25. motor
  26. True
  27. True
  28. potentiometer
  29. True
  30. False
  31. blows if current is high
  32. motor
  33. resistor
  34. turns a fan or wheels
  35. glows using little power
  36. False
  37. False
  38. True
  39. buzzer
  40. lets current go one way

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