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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 708 · 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 boosts a small signal? (a) LDR (b) buzzer (c) transistor (d) diode
  2. 2.True or false: a potentiometer is a resistance knob. (a) True (b) False
  3. 3.🧩 Which component beeps for an alarm? (a) fuse (b) potentiometer (c) buzzer (d) thermistor
  4. 4.True or false: a capacitor limits the current. (a) True (b) False
  5. 5.🧩 Which component glows using little power? (a) transistor (b) LED (c) thermistor (d) motor
  6. 6.🧩 Which component has coloured bands? (a) motor (b) resistor (c) thermistor (d) buzzer
  7. 7.🧩 A capacitor in a circuit can … (a) make light (b) spin a wheel (c) measure heat (d) store charge briefly
  8. 8.True or false: a capacitor lets current go one way. (a) True (b) False
  9. 9.🧩 Which part changes electrical energy into sound? (a) a buzzer (b) a resistor (c) a diode (d) a capacitor
  10. 10.🧩 Which component smooths a wobbly supply? (a) potentiometer (b) diode (c) capacitor (d) resistor
  11. 11.🧩 Which part changes electrical energy into movement? (a) a resistor (b) a motor (c) a fuse (d) an LED
  12. 12.What does a thermistor do? (a) limits the current (b) senses how hot it is (c) beeps for an alarm (d) makes things spin
  13. 13.True or false: a buzzer makes a beeping sound. (a) False (b) True
  14. 14.🧩 Which component is a resistance knob? (a) LDR (b) capacitor (c) diode (d) potentiometer
  15. 15.What does a potentiometer do? (a) lets current go one way (b) is a resistance knob (c) has coloured bands (d) turns a fan or wheels
  16. 16.True or false: a motor stores a little charge. (a) True (b) False
  17. 17.What does a capacitor do? (a) turns a fan or wheels (b) smooths a wobbly supply (c) lets current go one way (d) beeps for an alarm
  18. 18.🧩 Which component stores a little charge? (a) capacitor (b) diode (c) fuse (d) transistor
  19. 19.What does an LDR do? (a) senses how bright it is (b) makes a beeping sound (c) lets current go one way (d) limits the current
  20. 20.True or false: an LED senses how hot it is. (a) True (b) False
  21. 21.True or false: a motor limits the current. (a) True (b) False
  22. 22.True or false: an LED lets current go one way. (a) True (b) False
  23. 23.🧩 Which component senses how hot it is? (a) capacitor (b) thermistor (c) diode (d) fuse
  24. 24.True or false: an LED boosts a small signal. (a) True (b) False
  25. 25.True or false: an LED glows using little power. (a) True (b) False
  26. 26.🧩 Which component limits the current? (a) capacitor (b) transistor (c) buzzer (d) resistor
  27. 27.What does a motor do? (a) makes a beeping sound (b) smooths a wobbly supply (c) makes things spin (d) is a resistance knob
  28. 28.What does a diode do? (a) beeps for an alarm (b) boosts a small signal (c) lets current go one way (d) smooths a wobbly supply
  29. 29.True or false: an LDR blows if current is high. (a) False (b) True
  30. 30.What does a fuse do? (a) senses how hot it is (b) blows if current is high (c) limits the current (d) glows using little power
  31. 31.True or false: a motor makes things spin. (a) True (b) False
  32. 32.True or false: a thermistor smooths a wobbly supply. (a) True (b) False
  33. 33.What does a buzzer do? (a) smooths a wobbly supply (b) senses how hot it is (c) limits the current (d) makes a beeping sound
  34. 34.What does a capacitor do? (a) beeps for an alarm (b) lets current go one way (c) has coloured bands (d) stores a little charge
  35. 35.True or false: a diode beeps for an alarm. (a) True (b) False
  36. 36.🧩 Which component lets current go one way? (a) diode (b) capacitor (c) transistor (d) fuse
  37. 37.True or false: an LDR lets current go one way. (a) True (b) False
  38. 38.True or false: a transistor smooths a wobbly supply. (a) False (b) True
  39. 39.What does an LED do? (a) glows using little power (b) beeps for an alarm (c) boosts a small signal (d) makes things spin
  40. 40.True or false: a buzzer beeps for an alarm. (a) True (b) False

Answer key

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

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