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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 385 · 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.🧩 A capacitor in a circuit can … (a) spin a wheel (b) make light (c) store charge briefly (d) measure heat
  2. 2.True or false: a resistor boosts a small signal. (a) True (b) False
  3. 3.True or false: a buzzer beeps for an alarm. (a) True (b) False
  4. 4.🧩 Which component turns a fan or wheels? (a) motor (b) resistor (c) thermistor (d) capacitor
  5. 5.True or false: a motor limits the current. (a) False (b) True
  6. 6.🧩 Which component blows if current is high? (a) transistor (b) diode (c) capacitor (d) fuse
  7. 7.What does a motor do? (a) makes things spin (b) smooths a wobbly supply (c) limits the current (d) boosts a small signal
  8. 8.🧩 Which part changes electrical energy into movement? (a) a fuse (b) a motor (c) an LED (d) a resistor
  9. 9.What does a thermistor do? (a) is a resistance knob (b) lets current go one way (c) blows if current is high (d) senses how hot it is
  10. 10.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a diode (c) a capacitor (d) a buzzer
  11. 11.True or false: a diode glows using little power. (a) True (b) False
  12. 12.True or false: a motor turns a fan or wheels. (a) True (b) False
  13. 13.True or false: a buzzer boosts a small signal. (a) True (b) False
  14. 14.🧩 Which component beeps for an alarm? (a) fuse (b) buzzer (c) thermistor (d) capacitor
  15. 15.🧩 Which component smooths a wobbly supply? (a) capacitor (b) resistor (c) transistor (d) LED
  16. 16.True or false: a fuse blows if current is high. (a) False (b) True
  17. 17.🧩 Which component makes a beeping sound? (a) buzzer (b) transistor (c) thermistor (d) potentiometer
  18. 18.True or false: a buzzer makes a beeping sound. (a) True (b) False
  19. 19.What does a buzzer do? (a) lets current go one way (b) stores a little charge (c) turns a fan or wheels (d) beeps for an alarm
  20. 20.True or false: a buzzer stores a little charge. (a) True (b) False
  21. 21.What does a buzzer do? (a) has coloured bands (b) glows using little power (c) boosts a small signal (d) makes a beeping sound
  22. 22.What does an LED do? (a) glows using little power (b) makes a beeping sound (c) senses how hot it is (d) beeps for an alarm
  23. 23.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
  24. 24.True or false: a resistor limits the current. (a) True (b) False
  25. 25.True or false: a transistor makes a beeping sound. (a) False (b) True
  26. 26.🧩 Which component lets current go one way? (a) fuse (b) diode (c) capacitor (d) transistor
  27. 27.🧩 Which component stores a little charge? (a) motor (b) LED (c) thermistor (d) capacitor
  28. 28.True or false: an LED makes a beeping sound. (a) True (b) False
  29. 29.What does a potentiometer do? (a) senses how hot it is (b) is a resistance knob (c) boosts a small signal (d) makes a beeping sound
  30. 30.What does a resistor do? (a) turns a fan or wheels (b) makes things spin (c) beeps for an alarm (d) limits the current
  31. 31.True or false: an LDR senses how bright it is. (a) False (b) True
  32. 32.🧩 Which component makes things spin? (a) motor (b) LDR (c) thermistor (d) potentiometer
  33. 33.What does a diode do? (a) stores a little charge (b) lets current go one way (c) smooths a wobbly supply (d) makes a beeping sound
  34. 34.What does a capacitor do? (a) smooths a wobbly supply (b) glows using little power (c) beeps for an alarm (d) limits the current
  35. 35.🧩 Which component glows using little power? (a) fuse (b) resistor (c) LED (d) transistor
  36. 36.True or false: a thermistor stores a little charge. (a) False (b) True
  37. 37.🧩 Which component senses how bright it is? (a) LDR (b) capacitor (c) transistor (d) resistor
  38. 38.What does a transistor do? (a) turns a fan or wheels (b) is a resistance knob (c) lets current go one way (d) boosts a small signal
  39. 39.🧩 Which component has coloured bands? (a) LED (b) motor (c) potentiometer (d) resistor
  40. 40.🧩 Which component senses how hot it is? (a) diode (b) motor (c) capacitor (d) thermistor

Answer key

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

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