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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 434 · 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 transistor has coloured bands. (a) False (b) True
  2. 2.What does a capacitor do? (a) stores a little charge (b) boosts a small signal (c) beeps for an alarm (d) blows if current is high
  3. 3.🧩 A capacitor in a circuit can … (a) spin a wheel (b) measure heat (c) make light (d) store charge briefly
  4. 4.True or false: an LDR makes things spin. (a) False (b) True
  5. 5.What does a thermistor do? (a) is a resistance knob (b) senses how bright it is (c) senses how hot it is (d) blows if current is high
  6. 6.What does an LED do? (a) stores a little charge (b) senses how hot it is (c) glows using little power (d) beeps for an alarm
  7. 7.True or false: a fuse blows if current is high. (a) True (b) False
  8. 8.🧩 Which component is a resistance knob? (a) LED (b) transistor (c) potentiometer (d) buzzer
  9. 9.What does a transistor do? (a) makes things spin (b) senses how bright it is (c) boosts a small signal (d) blows if current is high
  10. 10.What does a buzzer do? (a) boosts a small signal (b) stores a little charge (c) makes a beeping sound (d) is a resistance knob
  11. 11.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
  12. 12.What does a diode do? (a) turns a fan or wheels (b) glows using little power (c) blows if current is high (d) lets current go one way
  13. 13.🧩 Which component makes a beeping sound? (a) buzzer (b) thermistor (c) fuse (d) motor
  14. 14.🧩 Which part changes electrical energy into sound? (a) a buzzer (b) a diode (c) a resistor (d) a capacitor
  15. 15.🧩 Which component lets current go one way? (a) LED (b) fuse (c) diode (d) potentiometer
  16. 16.True or false: a diode boosts a small signal. (a) True (b) False
  17. 17.🧩 Which part changes electrical energy into movement? (a) a fuse (b) a motor (c) an LED (d) a resistor
  18. 18.True or false: a potentiometer is a resistance knob. (a) False (b) True
  19. 19.What does a capacitor do? (a) turns a fan or wheels (b) glows using little power (c) beeps for an alarm (d) smooths a wobbly supply
  20. 20.🧩 Which component senses how hot it is? (a) thermistor (b) resistor (c) buzzer (d) potentiometer
  21. 21.🧩 Which component glows using little power? (a) LED (b) LDR (c) diode (d) potentiometer
  22. 22.True or false: a resistor senses how hot it is. (a) True (b) False
  23. 23.True or false: a motor turns a fan or wheels. (a) False (b) True
  24. 24.🧩 Which component limits the current? (a) thermistor (b) motor (c) resistor (d) potentiometer
  25. 25.🧩 Which component senses how bright it is? (a) LDR (b) buzzer (c) fuse (d) thermistor
  26. 26.What does an LDR do? (a) limits the current (b) stores a little charge (c) turns a fan or wheels (d) senses how bright it is
  27. 27.What does a motor do? (a) boosts a small signal (b) makes things spin (c) beeps for an alarm (d) limits the current
  28. 28.What does a fuse do? (a) senses how hot it is (b) turns a fan or wheels (c) stores a little charge (d) blows if current is high
  29. 29.True or false: a resistor limits the current. (a) True (b) False
  30. 30.🧩 Which component has coloured bands? (a) resistor (b) transistor (c) capacitor (d) motor
  31. 31.🧩 Which component beeps for an alarm? (a) LDR (b) potentiometer (c) buzzer (d) resistor
  32. 32.True or false: a motor has coloured bands. (a) True (b) False
  33. 33.True or false: an LED glows using little power. (a) False (b) True
  34. 34.True or false: a resistor turns a fan or wheels. (a) True (b) False
  35. 35.True or false: a diode has coloured bands. (a) True (b) False
  36. 36.What does a buzzer do? (a) glows using little power (b) has coloured bands (c) stores a little charge (d) beeps for an alarm
  37. 37.🧩 Which component turns a fan or wheels? (a) thermistor (b) motor (c) capacitor (d) LDR
  38. 38.True or false: a capacitor glows using little power. (a) True (b) False
  39. 39.🧩 Which component makes things spin? (a) motor (b) potentiometer (c) buzzer (d) transistor
  40. 40.True or false: an LED senses how hot it is. (a) True (b) False

Answer key

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

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