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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 49 · 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 beeps for an alarm? (a) buzzer (b) LDR (c) potentiometer (d) LED
  2. 2.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a buzzer (c) a diode (d) a resistor
  3. 3.What does a diode do? (a) lets current go one way (b) senses how bright it is (c) smooths a wobbly supply (d) has coloured bands
  4. 4.True or false: a resistor blows if current is high. (a) True (b) False
  5. 5.True or false: a motor makes things spin. (a) False (b) True
  6. 6.True or false: a motor smooths a wobbly supply. (a) True (b) False
  7. 7.🧩 A capacitor in a circuit can … (a) store charge briefly (b) measure heat (c) make light (d) spin a wheel
  8. 8.🧩 Which component makes things spin? (a) motor (b) fuse (c) transistor (d) buzzer
  9. 9.🧩 Which part changes electrical energy into movement? (a) a fuse (b) a resistor (c) an LED (d) a motor
  10. 10.What does a buzzer do? (a) blows if current is high (b) lets current go one way (c) makes a beeping sound (d) stores a little charge
  11. 11.What does an LDR do? (a) stores a little charge (b) beeps for an alarm (c) makes a beeping sound (d) senses how bright it is
  12. 12.🧩 Which component smooths a wobbly supply? (a) transistor (b) motor (c) capacitor (d) potentiometer
  13. 13.🧩 Which component blows if current is high? (a) resistor (b) diode (c) LDR (d) fuse
  14. 14.What does a capacitor do? (a) glows using little power (b) is a resistance knob (c) smooths a wobbly supply (d) turns a fan or wheels
  15. 15.🧩 Which component has coloured bands? (a) LED (b) transistor (c) thermistor (d) resistor
  16. 16.True or false: a transistor boosts a small signal. (a) False (b) True
  17. 17.True or false: a thermistor stores a little charge. (a) False (b) True
  18. 18.True or false: a motor turns a fan or wheels. (a) False (b) True
  19. 19.What does an LED do? (a) glows using little power (b) senses how bright it is (c) smooths a wobbly supply (d) boosts a small signal
  20. 20.True or false: an LED glows using little power. (a) False (b) True
  21. 21.What does a potentiometer do? (a) glows using little power (b) boosts a small signal (c) smooths a wobbly supply (d) is a resistance knob
  22. 22.What does a thermistor do? (a) beeps for an alarm (b) senses how bright it is (c) blows if current is high (d) senses how hot it is
  23. 23.What does a motor do? (a) turns a fan or wheels (b) beeps for an alarm (c) glows using little power (d) senses how hot it is
  24. 24.True or false: a resistor limits the current. (a) False (b) True
  25. 25.🧩 Which component senses how bright it is? (a) potentiometer (b) motor (c) capacitor (d) LDR
  26. 26.True or false: a diode senses how bright it is. (a) True (b) False
  27. 27.What does a resistor do? (a) glows using little power (b) senses how hot it is (c) limits the current (d) is a resistance knob
  28. 28.What does a transistor do? (a) glows using little power (b) smooths a wobbly supply (c) makes things spin (d) boosts a small signal
  29. 29.True or false: a fuse has coloured bands. (a) False (b) True
  30. 30.True or false: a motor has coloured bands. (a) False (b) True
  31. 31.What does a fuse do? (a) lets current go one way (b) beeps for an alarm (c) boosts a small signal (d) blows if current is high
  32. 32.True or false: a thermistor senses how hot it is. (a) True (b) False
  33. 33.🧩 Which component boosts a small signal? (a) resistor (b) diode (c) transistor (d) buzzer
  34. 34.🧩 Which component turns a fan or wheels? (a) LED (b) motor (c) buzzer (d) transistor
  35. 35.🧩 Which component stores a little charge? (a) diode (b) LDR (c) thermistor (d) capacitor
  36. 36.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
  37. 37.What does a capacitor do? (a) stores a little charge (b) makes a beeping sound (c) limits the current (d) senses how hot it is
  38. 38.True or false: a diode has coloured bands. (a) False (b) True
  39. 39.🧩 Which component makes a beeping sound? (a) LDR (b) diode (c) buzzer (d) potentiometer
  40. 40.True or false: a fuse blows if current is high. (a) False (b) True

Answer key

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

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