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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 232 · 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 component smooths a wobbly supply? (a) transistor (b) capacitor (c) diode (d) motor
  2. 2.🧩 Which part changes electrical energy into movement? (a) a motor (b) a fuse (c) an LED (d) a resistor
  3. 3.True or false: a resistor limits the current. (a) True (b) False
  4. 4.What does a buzzer do? (a) makes things spin (b) beeps for an alarm (c) limits the current (d) stores a little charge
  5. 5.🧩 Which component senses how hot it is? (a) fuse (b) LED (c) thermistor (d) diode
  6. 6.True or false: a capacitor stores a little charge. (a) False (b) True
  7. 7.🧩 A capacitor in a circuit can … (a) make light (b) measure heat (c) spin a wheel (d) store charge briefly
  8. 8.🧩 Which part changes electrical energy into sound? (a) a buzzer (b) a capacitor (c) a resistor (d) a diode
  9. 9.What does a thermistor do? (a) blows if current is high (b) beeps for an alarm (c) senses how hot it is (d) limits the current
  10. 10.What does a diode do? (a) senses how hot it is (b) lets current go one way (c) makes a beeping sound (d) turns a fan or wheels
  11. 11.What does a transistor do? (a) smooths a wobbly supply (b) boosts a small signal (c) stores a little charge (d) blows if current is high
  12. 12.🧩 Which component has coloured bands? (a) capacitor (b) LED (c) resistor (d) buzzer
  13. 13.What does a motor do? (a) makes things spin (b) lets current go one way (c) blows if current is high (d) has coloured bands
  14. 14.True or false: a fuse blows if current is high. (a) True (b) False
  15. 15.🧩 Which component turns a fan or wheels? (a) motor (b) diode (c) transistor (d) potentiometer
  16. 16.True or false: a transistor is a resistance knob. (a) True (b) False
  17. 17.What does a resistor do? (a) senses how hot it is (b) senses how bright it is (c) limits the current (d) makes things spin
  18. 18.True or false: an LED glows using little power. (a) False (b) True
  19. 19.🧩 Which component senses how bright it is? (a) diode (b) fuse (c) LDR (d) thermistor
  20. 20.What does a fuse do? (a) glows using little power (b) limits the current (c) beeps for an alarm (d) blows if current is high
  21. 21.What does a buzzer do? (a) makes a beeping sound (b) turns a fan or wheels (c) blows if current is high (d) senses how hot it is
  22. 22.True or false: a potentiometer is a resistance knob. (a) True (b) False
  23. 23.True or false: a thermistor senses how hot it is. (a) True (b) False
  24. 24.🧩 Which component boosts a small signal? (a) fuse (b) buzzer (c) transistor (d) diode
  25. 25.True or false: a fuse limits the current. (a) True (b) False
  26. 26.True or false: a transistor lets current go one way. (a) False (b) True
  27. 27.What does an LDR do? (a) glows using little power (b) turns a fan or wheels (c) senses how bright it is (d) beeps for an alarm
  28. 28.🧩 Which component makes things spin? (a) motor (b) buzzer (c) potentiometer (d) LED
  29. 29.🧩 Which component is a resistance knob? (a) thermistor (b) resistor (c) fuse (d) potentiometer
  30. 30.🧩 Which component lets current go one way? (a) transistor (b) potentiometer (c) diode (d) resistor
  31. 31.True or false: a resistor boosts a small signal. (a) False (b) True
  32. 32.What does an LED do? (a) smooths a wobbly supply (b) senses how bright it is (c) senses how hot it is (d) glows using little power
  33. 33.What does a capacitor do? (a) beeps for an alarm (b) makes things spin (c) senses how bright it is (d) stores a little charge
  34. 34.🧩 Which component makes a beeping sound? (a) transistor (b) buzzer (c) resistor (d) motor
  35. 35.True or false: an LED turns a fan or wheels. (a) True (b) False
  36. 36.True or false: an LED makes things spin. (a) False (b) True
  37. 37.What does a potentiometer do? (a) turns a fan or wheels (b) makes things spin (c) is a resistance knob (d) senses how bright it is
  38. 38.🧩 Which component beeps for an alarm? (a) buzzer (b) transistor (c) thermistor (d) LDR
  39. 39.True or false: a potentiometer makes a beeping sound. (a) False (b) True
  40. 40.True or false: a potentiometer beeps for an alarm. (a) False (b) True

Answer key

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

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