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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 105 · 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 limits the current? (a) resistor (b) diode (c) transistor (d) motor
  2. 2.🧩 Which component has coloured bands? (a) diode (b) resistor (c) buzzer (d) LDR
  3. 3.🧩 Which part changes electrical energy into movement? (a) a fuse (b) an LED (c) a motor (d) a resistor
  4. 4.True or false: an LDR senses how bright it is. (a) False (b) True
  5. 5.True or false: a motor stores a little charge. (a) True (b) False
  6. 6.🧩 Which component beeps for an alarm? (a) motor (b) transistor (c) buzzer (d) resistor
  7. 7.🧩 A capacitor in a circuit can … (a) make light (b) spin a wheel (c) store charge briefly (d) measure heat
  8. 8.What does a capacitor do? (a) limits the current (b) makes a beeping sound (c) smooths a wobbly supply (d) makes things spin
  9. 9.True or false: a capacitor is a resistance knob. (a) False (b) True
  10. 10.What does a motor do? (a) smooths a wobbly supply (b) makes things spin (c) beeps for an alarm (d) limits the current
  11. 11.🧩 Which component stores a little charge? (a) resistor (b) transistor (c) LED (d) capacitor
  12. 12.🧩 Which component senses how hot it is? (a) thermistor (b) transistor (c) buzzer (d) capacitor
  13. 13.True or false: a buzzer limits the current. (a) False (b) True
  14. 14.What does a fuse do? (a) limits the current (b) lets current go one way (c) blows if current is high (d) senses how bright it is
  15. 15.What does a resistor do? (a) makes a beeping sound (b) lets current go one way (c) limits the current (d) makes things spin
  16. 16.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
  17. 17.True or false: a diode makes a beeping sound. (a) False (b) True
  18. 18.True or false: a potentiometer limits the current. (a) False (b) True
  19. 19.True or false: a thermistor stores a little charge. (a) True (b) False
  20. 20.🧩 Which component makes things spin? (a) buzzer (b) capacitor (c) motor (d) thermistor
  21. 21.True or false: an LED boosts a small signal. (a) True (b) False
  22. 22.True or false: a transistor boosts a small signal. (a) False (b) True
  23. 23.True or false: a buzzer beeps for an alarm. (a) False (b) True
  24. 24.What does a capacitor do? (a) senses how bright it is (b) beeps for an alarm (c) is a resistance knob (d) stores a little charge
  25. 25.🧩 Which component senses how bright it is? (a) thermistor (b) buzzer (c) fuse (d) LDR
  26. 26.True or false: a motor turns a fan or wheels. (a) True (b) False
  27. 27.🧩 Which component makes a beeping sound? (a) motor (b) fuse (c) diode (d) buzzer
  28. 28.What does a resistor do? (a) blows if current is high (b) has coloured bands (c) turns a fan or wheels (d) stores a little charge
  29. 29.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a diode (c) a capacitor (d) a buzzer
  30. 30.What does a diode do? (a) blows if current is high (b) makes a beeping sound (c) lets current go one way (d) senses how hot it is
  31. 31.True or false: a transistor stores a little charge. (a) True (b) False
  32. 32.True or false: a diode lets current go one way. (a) False (b) True
  33. 33.True or false: an LED blows if current is high. (a) True (b) False
  34. 34.What does a transistor do? (a) beeps for an alarm (b) boosts a small signal (c) stores a little charge (d) glows using little power
  35. 35.True or false: a motor has coloured bands. (a) False (b) True
  36. 36.What does a buzzer do? (a) smooths a wobbly supply (b) makes a beeping sound (c) boosts a small signal (d) glows using little power
  37. 37.🧩 Which component boosts a small signal? (a) resistor (b) thermistor (c) transistor (d) diode
  38. 38.🧩 Which component glows using little power? (a) fuse (b) potentiometer (c) LED (d) thermistor
  39. 39.True or false: a motor makes things spin. (a) True (b) False
  40. 40.🧩 Which component is a resistance knob? (a) motor (b) resistor (c) potentiometer (d) transistor

Answer key

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

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