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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 584 · 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.What does a buzzer do? (a) stores a little charge (b) makes a beeping sound (c) glows using little power (d) limits the current
  2. 2.What does a buzzer do? (a) beeps for an alarm (b) lets current go one way (c) has coloured bands (d) limits the current
  3. 3.True or false: a diode lets current go one way. (a) False (b) True
  4. 4.🧩 Which component makes a beeping sound? (a) buzzer (b) thermistor (c) resistor (d) LDR
  5. 5.What does a motor do? (a) boosts a small signal (b) smooths a wobbly supply (c) limits the current (d) turns a fan or wheels
  6. 6.What does a thermistor do? (a) smooths a wobbly supply (b) stores a little charge (c) has coloured bands (d) senses how hot it is
  7. 7.What does a transistor do? (a) is a resistance knob (b) beeps for an alarm (c) boosts a small signal (d) smooths a wobbly supply
  8. 8.True or false: a buzzer beeps for an alarm. (a) False (b) True
  9. 9.🧩 A capacitor in a circuit can … (a) make light (b) spin a wheel (c) measure heat (d) store charge briefly
  10. 10.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a resistor (c) a diode (d) a buzzer
  11. 11.What does an LED do? (a) senses how bright it is (b) glows using little power (c) limits the current (d) has coloured bands
  12. 12.🧩 Which component senses how bright it is? (a) thermistor (b) diode (c) LDR (d) fuse
  13. 13.🧩 Which component glows using little power? (a) buzzer (b) thermistor (c) LED (d) potentiometer
  14. 14.🧩 Which part changes electrical energy into movement? (a) a motor (b) an LED (c) a resistor (d) a fuse
  15. 15.🧩 Which component beeps for an alarm? (a) LED (b) buzzer (c) resistor (d) LDR
  16. 16.🧩 Which component boosts a small signal? (a) fuse (b) motor (c) transistor (d) capacitor
  17. 17.True or false: an LDR senses how bright it is. (a) False (b) True
  18. 18.🧩 Which component limits the current? (a) LED (b) buzzer (c) capacitor (d) resistor
  19. 19.🧩 Which component senses how hot it is? (a) thermistor (b) fuse (c) buzzer (d) motor
  20. 20.True or false: a resistor beeps for an alarm. (a) False (b) True
  21. 21.What does a fuse do? (a) smooths a wobbly supply (b) turns a fan or wheels (c) blows if current is high (d) senses how bright it is
  22. 22.True or false: an LED stores a little charge. (a) True (b) False
  23. 23.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
  24. 24.What does an LDR do? (a) senses how bright it is (b) turns a fan or wheels (c) stores a little charge (d) senses how hot it is
  25. 25.🧩 Which component has coloured bands? (a) transistor (b) capacitor (c) thermistor (d) resistor
  26. 26.🧩 Which component stores a little charge? (a) resistor (b) buzzer (c) capacitor (d) fuse
  27. 27.True or false: a capacitor stores a little charge. (a) True (b) False
  28. 28.What does a resistor do? (a) senses how bright it is (b) lets current go one way (c) makes a beeping sound (d) limits the current
  29. 29.True or false: a motor has coloured bands. (a) False (b) True
  30. 30.True or false: a motor makes things spin. (a) True (b) False
  31. 31.True or false: a transistor boosts a small signal. (a) True (b) False
  32. 32.What does a diode do? (a) has coloured bands (b) lets current go one way (c) is a resistance knob (d) blows if current is high
  33. 33.🧩 Which component makes things spin? (a) diode (b) motor (c) buzzer (d) resistor
  34. 34.What does a capacitor do? (a) limits the current (b) boosts a small signal (c) senses how hot it is (d) smooths a wobbly supply
  35. 35.What does a resistor do? (a) has coloured bands (b) stores a little charge (c) beeps for an alarm (d) lets current go one way
  36. 36.True or false: a thermistor senses how hot it is. (a) False (b) True
  37. 37.🧩 Which component smooths a wobbly supply? (a) capacitor (b) motor (c) resistor (d) thermistor
  38. 38.True or false: a potentiometer is a resistance knob. (a) True (b) False
  39. 39.True or false: an LDR blows if current is high. (a) False (b) True
  40. 40.True or false: an LDR stores a little charge. (a) False (b) True

Answer key

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

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