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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 539 · 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 senses how hot it is? (a) resistor (b) LED (c) transistor (d) thermistor
  2. 2.🧩 Which part changes electrical energy into movement? (a) a fuse (b) an LED (c) a motor (d) a resistor
  3. 3.True or false: a capacitor stores a little charge. (a) False (b) True
  4. 4.What does a transistor do? (a) boosts a small signal (b) blows if current is high (c) is a resistance knob (d) glows using little power
  5. 5.True or false: a thermistor boosts a small signal. (a) False (b) True
  6. 6.🧩 Which component stores a little charge? (a) diode (b) capacitor (c) thermistor (d) fuse
  7. 7.🧩 Which component turns a fan or wheels? (a) buzzer (b) thermistor (c) motor (d) LED
  8. 8.What does an LED do? (a) blows if current is high (b) senses how bright it is (c) glows using little power (d) senses how hot it is
  9. 9.🧩 Which component blows if current is high? (a) transistor (b) potentiometer (c) capacitor (d) fuse
  10. 10.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a resistor (c) a buzzer (d) a diode
  11. 11.🧩 Which component senses how bright it is? (a) resistor (b) capacitor (c) buzzer (d) LDR
  12. 12.True or false: a motor makes things spin. (a) True (b) False
  13. 13.🧩 Which component is a resistance knob? (a) buzzer (b) potentiometer (c) capacitor (d) transistor
  14. 14.🧩 Which component limits the current? (a) transistor (b) motor (c) resistor (d) potentiometer
  15. 15.True or false: a buzzer makes a beeping sound. (a) False (b) True
  16. 16.What does a resistor do? (a) stores a little charge (b) beeps for an alarm (c) limits the current (d) boosts a small signal
  17. 17.What does a potentiometer do? (a) is a resistance knob (b) makes a beeping sound (c) limits the current (d) smooths a wobbly supply
  18. 18.True or false: a fuse beeps for an alarm. (a) True (b) False
  19. 19.🧩 Which component glows using little power? (a) fuse (b) thermistor (c) LDR (d) LED
  20. 20.True or false: an LED beeps for an alarm. (a) True (b) False
  21. 21.True or false: a thermistor blows if current is high. (a) True (b) False
  22. 22.What does a thermistor do? (a) turns a fan or wheels (b) senses how hot it is (c) lets current go one way (d) smooths a wobbly supply
  23. 23.🧩 Which component lets current go one way? (a) motor (b) buzzer (c) diode (d) fuse
  24. 24.True or false: a buzzer beeps for an alarm. (a) True (b) False
  25. 25.🧩 A capacitor in a circuit can … (a) store charge briefly (b) spin a wheel (c) measure heat (d) make light
  26. 26.What does a buzzer do? (a) makes things spin (b) limits the current (c) is a resistance knob (d) makes a beeping sound
  27. 27.True or false: an LDR boosts a small signal. (a) True (b) False
  28. 28.What does a diode do? (a) lets current go one way (b) senses how bright it is (c) beeps for an alarm (d) turns a fan or wheels
  29. 29.🧩 Which component has coloured bands? (a) capacitor (b) LDR (c) resistor (d) motor
  30. 30.True or false: a motor has coloured bands. (a) False (b) True
  31. 31.What does a motor do? (a) lets current go one way (b) makes a beeping sound (c) turns a fan or wheels (d) beeps for an alarm
  32. 32.🧩 Which component smooths a wobbly supply? (a) potentiometer (b) motor (c) LED (d) capacitor
  33. 33.🧩 Which component makes a beeping sound? (a) potentiometer (b) capacitor (c) diode (d) buzzer
  34. 34.True or false: a fuse blows if current is high. (a) True (b) False
  35. 35.🧩 Which component makes things spin? (a) motor (b) fuse (c) capacitor (d) buzzer
  36. 36.What does a fuse do? (a) boosts a small signal (b) lets current go one way (c) makes things spin (d) blows if current is high
  37. 37.What does a motor do? (a) makes things spin (b) lets current go one way (c) blows if current is high (d) glows using little power
  38. 38.True or false: an LED senses how bright it is. (a) False (b) True
  39. 39.True or false: a transistor boosts a small signal. (a) False (b) True
  40. 40.True or false: an LDR makes things spin. (a) False (b) True

Answer key

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

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