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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 193 · 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) a motor (c) an LED (d) a resistor
  2. 2.What does a capacitor do? (a) smooths a wobbly supply (b) limits the current (c) boosts a small signal (d) beeps for an alarm
  3. 3.🧩 Which component beeps for an alarm? (a) fuse (b) capacitor (c) thermistor (d) buzzer
  4. 4.True or false: a transistor boosts a small signal. (a) True (b) False
  5. 5.True or false: a resistor has coloured bands. (a) False (b) True
  6. 6.True or false: a buzzer beeps for an alarm. (a) False (b) True
  7. 7.True or false: a motor makes things spin. (a) False (b) True
  8. 8.What does a potentiometer do? (a) boosts a small signal (b) smooths a wobbly supply (c) lets current go one way (d) is a resistance knob
  9. 9.🧩 A capacitor in a circuit can … (a) measure heat (b) spin a wheel (c) store charge briefly (d) make light
  10. 10.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a resistor (c) a diode (d) a buzzer
  11. 11.🧩 Which component turns a fan or wheels? (a) capacitor (b) diode (c) thermistor (d) motor
  12. 12.What does a fuse do? (a) senses how bright it is (b) lets current go one way (c) blows if current is high (d) senses how hot it is
  13. 13.What does a capacitor do? (a) boosts a small signal (b) is a resistance knob (c) stores a little charge (d) has coloured bands
  14. 14.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
  15. 15.What does a buzzer do? (a) makes things spin (b) makes a beeping sound (c) limits the current (d) smooths a wobbly supply
  16. 16.What does a motor do? (a) makes things spin (b) senses how hot it is (c) has coloured bands (d) stores a little charge
  17. 17.True or false: a motor stores a little charge. (a) True (b) False
  18. 18.True or false: a fuse stores a little charge. (a) False (b) True
  19. 19.🧩 Which component smooths a wobbly supply? (a) buzzer (b) motor (c) thermistor (d) capacitor
  20. 20.What does a diode do? (a) turns a fan or wheels (b) lets current go one way (c) limits the current (d) blows if current is high
  21. 21.🧩 Which component lets current go one way? (a) potentiometer (b) LED (c) diode (d) thermistor
  22. 22.What does an LDR do? (a) smooths a wobbly supply (b) senses how bright it is (c) lets current go one way (d) limits the current
  23. 23.What does a buzzer do? (a) makes things spin (b) beeps for an alarm (c) is a resistance knob (d) lets current go one way
  24. 24.True or false: a buzzer limits the current. (a) True (b) False
  25. 25.True or false: an LED has coloured bands. (a) True (b) False
  26. 26.True or false: an LED glows using little power. (a) False (b) True
  27. 27.🧩 Which component limits the current? (a) resistor (b) LDR (c) capacitor (d) buzzer
  28. 28.What does an LED do? (a) senses how hot it is (b) has coloured bands (c) senses how bright it is (d) glows using little power
  29. 29.True or false: a motor boosts a small signal. (a) False (b) True
  30. 30.🧩 Which component makes things spin? (a) motor (b) LDR (c) capacitor (d) potentiometer
  31. 31.True or false: an LED turns a fan or wheels. (a) False (b) True
  32. 32.🧩 Which component makes a beeping sound? (a) fuse (b) LED (c) buzzer (d) capacitor
  33. 33.True or false: a motor is a resistance knob. (a) False (b) True
  34. 34.What does a thermistor do? (a) smooths a wobbly supply (b) turns a fan or wheels (c) senses how hot it is (d) glows using little power
  35. 35.True or false: an LED blows if current is high. (a) False (b) True
  36. 36.🧩 Which component senses how hot it is? (a) buzzer (b) potentiometer (c) resistor (d) thermistor
  37. 37.True or false: a buzzer senses how hot it is. (a) True (b) False
  38. 38.🧩 Which component blows if current is high? (a) resistor (b) transistor (c) motor (d) fuse
  39. 39.True or false: a resistor limits the current. (a) False (b) True
  40. 40.What does a motor do? (a) is a resistance knob (b) turns a fan or wheels (c) boosts a small signal (d) has coloured bands

Answer key

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

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