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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 519 · 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 smooths a wobbly supply? (a) LED (b) potentiometer (c) capacitor (d) motor
  2. 2.🧩 Which part changes electrical energy into sound? (a) a diode (b) a resistor (c) a capacitor (d) a buzzer
  3. 3.What does a potentiometer do? (a) turns a fan or wheels (b) stores a little charge (c) is a resistance knob (d) lets current go one way
  4. 4.What does a buzzer do? (a) smooths a wobbly supply (b) senses how bright it is (c) beeps for an alarm (d) blows if current is high
  5. 5.🧩 Which component lets current go one way? (a) LED (b) capacitor (c) diode (d) fuse
  6. 6.🧩 Which part changes electrical energy into movement? (a) an LED (b) a fuse (c) a motor (d) a resistor
  7. 7.What does an LDR do? (a) senses how bright it is (b) limits the current (c) smooths a wobbly supply (d) has coloured bands
  8. 8.What does a fuse do? (a) lets current go one way (b) turns a fan or wheels (c) smooths a wobbly supply (d) blows if current is high
  9. 9.What does a resistor do? (a) boosts a small signal (b) smooths a wobbly supply (c) limits the current (d) makes a beeping sound
  10. 10.What does a motor do? (a) limits the current (b) turns a fan or wheels (c) has coloured bands (d) boosts a small signal
  11. 11.What does a buzzer do? (a) senses how bright it is (b) is a resistance knob (c) smooths a wobbly supply (d) makes a beeping sound
  12. 12.🧩 Which component is a resistance knob? (a) resistor (b) potentiometer (c) LED (d) diode
  13. 13.🧩 Which component makes things spin? (a) LED (b) motor (c) thermistor (d) diode
  14. 14.🧩 A capacitor in a circuit can … (a) spin a wheel (b) measure heat (c) make light (d) store charge briefly
  15. 15.True or false: an LDR senses how bright it is. (a) False (b) True
  16. 16.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
  17. 17.True or false: an LDR makes a beeping sound. (a) False (b) True
  18. 18.🧩 Which component turns a fan or wheels? (a) capacitor (b) diode (c) resistor (d) motor
  19. 19.What does a capacitor do? (a) stores a little charge (b) lets current go one way (c) makes a beeping sound (d) limits the current
  20. 20.What does a capacitor do? (a) beeps for an alarm (b) limits the current (c) makes things spin (d) smooths a wobbly supply
  21. 21.True or false: a resistor makes things spin. (a) False (b) True
  22. 22.What does an LED do? (a) boosts a small signal (b) senses how hot it is (c) stores a little charge (d) glows using little power
  23. 23.True or false: an LED blows if current is high. (a) True (b) False
  24. 24.🧩 Which component senses how hot it is? (a) thermistor (b) transistor (c) LED (d) fuse
  25. 25.True or false: a diode smooths a wobbly supply. (a) True (b) False
  26. 26.True or false: a resistor limits the current. (a) False (b) True
  27. 27.🧩 Which component blows if current is high? (a) LDR (b) capacitor (c) resistor (d) fuse
  28. 28.🧩 Which component makes a beeping sound? (a) capacitor (b) buzzer (c) motor (d) transistor
  29. 29.True or false: a resistor beeps for an alarm. (a) False (b) True
  30. 30.True or false: a potentiometer is a resistance knob. (a) False (b) True
  31. 31.True or false: an LED glows using little power. (a) True (b) False
  32. 32.True or false: a buzzer beeps for an alarm. (a) False (b) True
  33. 33.What does a thermistor do? (a) makes a beeping sound (b) has coloured bands (c) senses how hot it is (d) smooths a wobbly supply
  34. 34.True or false: a buzzer stores a little charge. (a) True (b) False
  35. 35.🧩 Which component beeps for an alarm? (a) thermistor (b) potentiometer (c) buzzer (d) motor
  36. 36.True or false: an LED makes things spin. (a) True (b) False
  37. 37.🧩 Which component senses how bright it is? (a) transistor (b) diode (c) LDR (d) motor
  38. 38.True or false: a transistor boosts a small signal. (a) False (b) True
  39. 39.🧩 Which component glows using little power? (a) LED (b) buzzer (c) potentiometer (d) transistor
  40. 40.True or false: an LDR beeps for an alarm. (a) False (b) True

Answer key

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

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