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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 433 · 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 resistor lets current go one way. (a) True (b) False
  2. 2.True or false: a diode lets current go one way. (a) True (b) False
  3. 3.What does an LED do? (a) turns a fan or wheels (b) boosts a small signal (c) glows using little power (d) smooths a wobbly supply
  4. 4.🧩 A capacitor in a circuit can … (a) make light (b) spin a wheel (c) measure heat (d) store charge briefly
  5. 5.🧩 Which part changes electrical energy into sound? (a) a buzzer (b) a capacitor (c) a resistor (d) a diode
  6. 6.True or false: a potentiometer limits the current. (a) True (b) False
  7. 7.🧩 Which component senses how hot it is? (a) resistor (b) diode (c) thermistor (d) potentiometer
  8. 8.True or false: a transistor boosts a small signal. (a) True (b) False
  9. 9.🧩 Which component blows if current is high? (a) potentiometer (b) capacitor (c) resistor (d) fuse
  10. 10.What does a buzzer do? (a) has coloured bands (b) senses how hot it is (c) makes things spin (d) makes a beeping sound
  11. 11.What does a resistor do? (a) has coloured bands (b) beeps for an alarm (c) makes things spin (d) senses how hot it is
  12. 12.True or false: an LED glows using little power. (a) False (b) True
  13. 13.True or false: a potentiometer is a resistance knob. (a) True (b) False
  14. 14.🧩 Which component boosts a small signal? (a) resistor (b) transistor (c) LDR (d) buzzer
  15. 15.🧩 Which part changes electrical energy into movement? (a) a resistor (b) a motor (c) an LED (d) a fuse
  16. 16.True or false: an LDR makes things spin. (a) False (b) True
  17. 17.🧩 Which component has coloured bands? (a) transistor (b) LED (c) resistor (d) fuse
  18. 18.🧩 Which component makes things spin? (a) thermistor (b) resistor (c) motor (d) capacitor
  19. 19.🧩 Which component makes a beeping sound? (a) transistor (b) LED (c) buzzer (d) diode
  20. 20.What does a capacitor do? (a) stores a little charge (b) glows using little power (c) blows if current is high (d) makes things spin
  21. 21.🧩 Which component beeps for an alarm? (a) diode (b) thermistor (c) transistor (d) buzzer
  22. 22.🧩 Which component lets current go one way? (a) buzzer (b) diode (c) potentiometer (d) motor
  23. 23.What does a motor do? (a) turns a fan or wheels (b) glows using little power (c) makes a beeping sound (d) limits the current
  24. 24.🧩 Which component senses how bright it is? (a) LDR (b) capacitor (c) thermistor (d) diode
  25. 25.True or false: a transistor senses how bright it is. (a) True (b) False
  26. 26.🧩 Which component smooths a wobbly supply? (a) buzzer (b) capacitor (c) transistor (d) LDR
  27. 27.True or false: a motor stores a little charge. (a) False (b) True
  28. 28.True or false: a thermistor turns a fan or wheels. (a) False (b) True
  29. 29.🧩 Which component limits the current? (a) buzzer (b) resistor (c) LDR (d) motor
  30. 30.True or false: a capacitor blows if current is high. (a) False (b) True
  31. 31.True or false: an LED blows if current is high. (a) True (b) False
  32. 32.🧩 Which component turns a fan or wheels? (a) thermistor (b) motor (c) fuse (d) resistor
  33. 33.What does an LDR do? (a) has coloured bands (b) senses how bright it is (c) is a resistance knob (d) stores a little charge
  34. 34.True or false: a motor makes things spin. (a) True (b) False
  35. 35.🧩 Which component glows using little power? (a) buzzer (b) thermistor (c) resistor (d) LED
  36. 36.True or false: a capacitor smooths a wobbly supply. (a) True (b) False
  37. 37.What does a buzzer do? (a) blows if current is high (b) boosts a small signal (c) lets current go one way (d) beeps for an alarm
  38. 38.True or false: an LDR smooths a wobbly supply. (a) True (b) False
  39. 39.What does a fuse do? (a) senses how hot it is (b) limits the current (c) blows if current is high (d) makes things spin
  40. 40.True or false: a fuse smooths a wobbly supply. (a) False (b) True

Answer key

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

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