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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 73 · 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 makes a beeping sound? (a) resistor (b) thermistor (c) LED (d) buzzer
  2. 2.What does a capacitor do? (a) makes a beeping sound (b) senses how bright it is (c) is a resistance knob (d) stores a little charge
  3. 3.🧩 Which component limits the current? (a) fuse (b) potentiometer (c) resistor (d) diode
  4. 4.What does a buzzer do? (a) glows using little power (b) beeps for an alarm (c) limits the current (d) is a resistance knob
  5. 5.What does an LDR do? (a) stores a little charge (b) has coloured bands (c) boosts a small signal (d) senses how bright it is
  6. 6.🧩 A capacitor in a circuit can … (a) measure heat (b) make light (c) store charge briefly (d) spin a wheel
  7. 7.What does a potentiometer do? (a) senses how hot it is (b) is a resistance knob (c) lets current go one way (d) senses how bright it is
  8. 8.🧩 Which component blows if current is high? (a) buzzer (b) transistor (c) resistor (d) fuse
  9. 9.True or false: an LDR senses how bright it is. (a) False (b) True
  10. 10.True or false: a fuse blows if current is high. (a) True (b) False
  11. 11.True or false: a thermistor senses how hot it is. (a) True (b) False
  12. 12.What does a diode do? (a) beeps for an alarm (b) makes a beeping sound (c) lets current go one way (d) is a resistance knob
  13. 13.🧩 Which component senses how hot it is? (a) LDR (b) motor (c) thermistor (d) LED
  14. 14.🧩 Which part changes electrical energy into movement? (a) a fuse (b) an LED (c) a resistor (d) a motor
  15. 15.True or false: a potentiometer is a resistance knob. (a) True (b) False
  16. 16.True or false: a capacitor lets current go one way. (a) False (b) True
  17. 17.🧩 Which part changes electrical energy into sound? (a) a diode (b) a capacitor (c) a buzzer (d) a resistor
  18. 18.What does a transistor do? (a) stores a little charge (b) senses how hot it is (c) boosts a small signal (d) smooths a wobbly supply
  19. 19.What does a motor do? (a) smooths a wobbly supply (b) makes a beeping sound (c) turns a fan or wheels (d) limits the current
  20. 20.🧩 Which component makes things spin? (a) resistor (b) diode (c) motor (d) transistor
  21. 21.🧩 Which component smooths a wobbly supply? (a) thermistor (b) buzzer (c) resistor (d) capacitor
  22. 22.True or false: a motor limits the current. (a) False (b) True
  23. 23.True or false: a motor smooths a wobbly supply. (a) False (b) True
  24. 24.True or false: a buzzer smooths a wobbly supply. (a) True (b) False
  25. 25.🧩 Which component glows using little power? (a) LDR (b) thermistor (c) LED (d) capacitor
  26. 26.🧩 Which component turns a fan or wheels? (a) motor (b) thermistor (c) potentiometer (d) capacitor
  27. 27.True or false: a transistor boosts a small signal. (a) True (b) False
  28. 28.🧩 Which component boosts a small signal? (a) LDR (b) transistor (c) resistor (d) diode
  29. 29.What does an LED do? (a) stores a little charge (b) glows using little power (c) is a resistance knob (d) senses how bright it is
  30. 30.🧩 Which component has coloured bands? (a) transistor (b) fuse (c) resistor (d) LDR
  31. 31.What does a fuse do? (a) makes a beeping sound (b) smooths a wobbly supply (c) blows if current is high (d) senses how hot it is
  32. 32.True or false: a potentiometer lets current go one way. (a) True (b) False
  33. 33.True or false: an LED makes things spin. (a) False (b) True
  34. 34.True or false: a resistor makes a beeping sound. (a) False (b) True
  35. 35.True or false: a thermistor lets current go one way. (a) False (b) True
  36. 36.True or false: a diode senses how bright it is. (a) True (b) False
  37. 37.What does a resistor do? (a) has coloured bands (b) senses how bright it is (c) smooths a wobbly supply (d) senses how hot it is
  38. 38.True or false: a fuse glows using little power. (a) True (b) False
  39. 39.True or false: a buzzer has coloured bands. (a) True (b) False
  40. 40.🧩 Which component beeps for an alarm? (a) resistor (b) fuse (c) capacitor (d) buzzer

Answer key

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

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