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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 527 · 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 has coloured bands? (a) diode (b) thermistor (c) resistor (d) potentiometer
  2. 2.What does a diode do? (a) lets current go one way (b) is a resistance knob (c) senses how bright it is (d) limits the current
  3. 3.🧩 Which component senses how hot it is? (a) thermistor (b) resistor (c) potentiometer (d) LED
  4. 4.What does a buzzer do? (a) has coloured bands (b) makes a beeping sound (c) boosts a small signal (d) senses how bright it is
  5. 5.🧩 Which component smooths a wobbly supply? (a) resistor (b) capacitor (c) potentiometer (d) buzzer
  6. 6.True or false: a diode lets current go one way. (a) False (b) True
  7. 7.🧩 A capacitor in a circuit can … (a) measure heat (b) make light (c) store charge briefly (d) spin a wheel
  8. 8.🧩 Which part changes electrical energy into movement? (a) an LED (b) a resistor (c) a fuse (d) a motor
  9. 9.🧩 Which component makes things spin? (a) thermistor (b) buzzer (c) motor (d) capacitor
  10. 10.🧩 Which part changes electrical energy into sound? (a) a buzzer (b) a capacitor (c) a diode (d) a resistor
  11. 11.What does a buzzer do? (a) lets current go one way (b) beeps for an alarm (c) boosts a small signal (d) senses how bright it is
  12. 12.True or false: a transistor boosts a small signal. (a) False (b) True
  13. 13.True or false: a fuse blows if current is high. (a) False (b) True
  14. 14.🧩 Which component makes a beeping sound? (a) potentiometer (b) buzzer (c) capacitor (d) motor
  15. 15.What does a thermistor do? (a) boosts a small signal (b) smooths a wobbly supply (c) senses how hot it is (d) makes a beeping sound
  16. 16.True or false: a fuse senses how bright it is. (a) False (b) True
  17. 17.What does a potentiometer do? (a) boosts a small signal (b) is a resistance knob (c) turns a fan or wheels (d) senses how hot it is
  18. 18.What does a fuse do? (a) blows if current is high (b) smooths a wobbly supply (c) makes things spin (d) makes a beeping sound
  19. 19.What does a resistor do? (a) glows using little power (b) limits the current (c) is a resistance knob (d) senses how bright it is
  20. 20.🧩 Which component senses how bright it is? (a) LED (b) transistor (c) capacitor (d) LDR
  21. 21.True or false: an LDR senses how bright it is. (a) False (b) True
  22. 22.True or false: a buzzer is a resistance knob. (a) True (b) False
  23. 23.🧩 Which component stores a little charge? (a) motor (b) diode (c) LDR (d) capacitor
  24. 24.True or false: a diode smooths a wobbly supply. (a) True (b) False
  25. 25.🧩 Which component lets current go one way? (a) motor (b) diode (c) buzzer (d) transistor
  26. 26.🧩 Which component glows using little power? (a) LED (b) thermistor (c) diode (d) resistor
  27. 27.True or false: a capacitor senses how bright it is. (a) False (b) True
  28. 28.What does a transistor do? (a) is a resistance knob (b) turns a fan or wheels (c) boosts a small signal (d) senses how hot it is
  29. 29.🧩 Which component turns a fan or wheels? (a) motor (b) transistor (c) LDR (d) diode
  30. 30.🧩 Which component blows if current is high? (a) capacitor (b) motor (c) diode (d) fuse
  31. 31.🧩 Which component beeps for an alarm? (a) diode (b) potentiometer (c) fuse (d) buzzer
  32. 32.True or false: an LED senses how bright it is. (a) True (b) False
  33. 33.What does a resistor do? (a) lets current go one way (b) turns a fan or wheels (c) smooths a wobbly supply (d) has coloured bands
  34. 34.What does an LED do? (a) blows if current is high (b) glows using little power (c) beeps for an alarm (d) senses how bright it is
  35. 35.True or false: a buzzer senses how bright it is. (a) False (b) True
  36. 36.🧩 Which component is a resistance knob? (a) LED (b) buzzer (c) fuse (d) potentiometer
  37. 37.True or false: a fuse glows using little power. (a) True (b) False
  38. 38.True or false: an LED glows using little power. (a) True (b) False
  39. 39.What does a motor do? (a) turns a fan or wheels (b) boosts a small signal (c) senses how bright it is (d) beeps for an alarm
  40. 40.True or false: an LDR glows using little power. (a) False (b) True

Answer key

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

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