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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 106 · 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.True or false: a capacitor stores a little charge. (a) True (b) False
  2. 2.🧩 Which part changes electrical energy into movement? (a) a fuse (b) a resistor (c) an LED (d) a motor
  3. 3.🧩 A capacitor in a circuit can … (a) make light (b) store charge briefly (c) spin a wheel (d) measure heat
  4. 4.What does a capacitor do? (a) stores a little charge (b) glows using little power (c) senses how bright it is (d) beeps for an alarm
  5. 5.What does a transistor do? (a) lets current go one way (b) glows using little power (c) boosts a small signal (d) is a resistance knob
  6. 6.True or false: a motor senses how bright it is. (a) False (b) True
  7. 7.🧩 Which component limits the current? (a) resistor (b) thermistor (c) transistor (d) LED
  8. 8.True or false: a potentiometer is a resistance knob. (a) False (b) True
  9. 9.🧩 Which component beeps for an alarm? (a) transistor (b) motor (c) buzzer (d) thermistor
  10. 10.True or false: a diode lets current go one way. (a) False (b) True
  11. 11.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a buzzer (c) a diode (d) a resistor
  12. 12.True or false: a motor makes things spin. (a) True (b) False
  13. 13.True or false: a diode turns a fan or wheels. (a) False (b) True
  14. 14.What does a fuse do? (a) is a resistance knob (b) blows if current is high (c) turns a fan or wheels (d) glows using little power
  15. 15.🧩 Which component blows if current is high? (a) potentiometer (b) diode (c) motor (d) fuse
  16. 16.What does an LDR do? (a) turns a fan or wheels (b) senses how bright it is (c) blows if current is high (d) lets current go one way
  17. 17.True or false: a resistor limits the current. (a) False (b) True
  18. 18.🧩 Which component boosts a small signal? (a) thermistor (b) potentiometer (c) transistor (d) buzzer
  19. 19.True or false: a resistor lets current go one way. (a) True (b) False
  20. 20.What does a capacitor do? (a) blows if current is high (b) senses how hot it is (c) senses how bright it is (d) smooths a wobbly supply
  21. 21.True or false: a thermistor makes a beeping sound. (a) True (b) False
  22. 22.What does an LED do? (a) beeps for an alarm (b) glows using little power (c) makes things spin (d) turns a fan or wheels
  23. 23.True or false: a buzzer limits the current. (a) False (b) True
  24. 24.True or false: a thermistor stores a little charge. (a) False (b) True
  25. 25.🧩 Which component is a resistance knob? (a) diode (b) LED (c) resistor (d) potentiometer
  26. 26.🧩 Which component senses how bright it is? (a) thermistor (b) buzzer (c) capacitor (d) LDR
  27. 27.True or false: a buzzer blows if current is high. (a) True (b) False
  28. 28.True or false: a buzzer beeps for an alarm. (a) False (b) True
  29. 29.True or false: a potentiometer lets current go one way. (a) True (b) False
  30. 30.What does a diode do? (a) turns a fan or wheels (b) lets current go one way (c) has coloured bands (d) smooths a wobbly supply
  31. 31.🧩 Which component turns a fan or wheels? (a) motor (b) LED (c) thermistor (d) diode
  32. 32.True or false: a potentiometer senses how hot it is. (a) False (b) True
  33. 33.🧩 Which component senses how hot it is? (a) motor (b) thermistor (c) LED (d) buzzer
  34. 34.🧩 Which component smooths a wobbly supply? (a) fuse (b) thermistor (c) motor (d) capacitor
  35. 35.True or false: a thermistor senses how hot it is. (a) False (b) True
  36. 36.True or false: a resistor has coloured bands. (a) False (b) True
  37. 37.True or false: a motor smooths a wobbly supply. (a) False (b) True
  38. 38.🧩 Which component glows using little power? (a) diode (b) buzzer (c) transistor (d) LED
  39. 39.True or false: a buzzer smooths a wobbly supply. (a) True (b) False
  40. 40.What does a buzzer do? (a) lets current go one way (b) smooths a wobbly supply (c) makes things spin (d) makes a beeping sound

Answer key

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

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