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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 655 · 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 diode do? (a) beeps for an alarm (b) lets current go one way (c) has coloured bands (d) smooths a wobbly supply
  2. 2.True or false: a diode senses how hot it is. (a) False (b) True
  3. 3.🧩 A capacitor in a circuit can … (a) store charge briefly (b) measure heat (c) make light (d) spin a wheel
  4. 4.What does a motor do? (a) is a resistance knob (b) glows using little power (c) has coloured bands (d) turns a fan or wheels
  5. 5.True or false: a motor stores a little charge. (a) True (b) False
  6. 6.🧩 Which part changes electrical energy into movement? (a) a motor (b) an LED (c) a resistor (d) a fuse
  7. 7.True or false: a transistor boosts a small signal. (a) False (b) True
  8. 8.🧩 Which component has coloured bands? (a) fuse (b) resistor (c) transistor (d) LDR
  9. 9.🧩 Which component senses how bright it is? (a) LDR (b) capacitor (c) buzzer (d) potentiometer
  10. 10.🧩 Which component limits the current? (a) capacitor (b) buzzer (c) diode (d) resistor
  11. 11.True or false: a diode boosts a small signal. (a) True (b) False
  12. 12.🧩 Which component blows if current is high? (a) potentiometer (b) transistor (c) fuse (d) LDR
  13. 13.What does a potentiometer do? (a) turns a fan or wheels (b) smooths a wobbly supply (c) senses how hot it is (d) is a resistance knob
  14. 14.True or false: a thermistor turns a fan or wheels. (a) True (b) False
  15. 15.What does a buzzer do? (a) smooths a wobbly supply (b) lets current go one way (c) makes things spin (d) makes a beeping sound
  16. 16.True or false: a motor turns a fan or wheels. (a) False (b) True
  17. 17.What does a transistor do? (a) makes a beeping sound (b) boosts a small signal (c) has coloured bands (d) turns a fan or wheels
  18. 18.🧩 Which component turns a fan or wheels? (a) LED (b) fuse (c) motor (d) resistor
  19. 19.True or false: a buzzer senses how bright it is. (a) False (b) True
  20. 20.🧩 Which component lets current go one way? (a) capacitor (b) motor (c) diode (d) transistor
  21. 21.True or false: an LDR senses how bright it is. (a) False (b) True
  22. 22.🧩 Which component glows using little power? (a) buzzer (b) diode (c) LED (d) motor
  23. 23.What does an LDR do? (a) senses how bright it is (b) boosts a small signal (c) lets current go one way (d) glows using little power
  24. 24.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a capacitor (c) a buzzer (d) a diode
  25. 25.True or false: a capacitor smooths a wobbly supply. (a) True (b) False
  26. 26.What does a buzzer do? (a) has coloured bands (b) limits the current (c) beeps for an alarm (d) glows using little power
  27. 27.🧩 Which component makes things spin? (a) motor (b) capacitor (c) buzzer (d) thermistor
  28. 28.True or false: an LED glows using little power. (a) False (b) True
  29. 29.What does a motor do? (a) makes things spin (b) limits the current (c) senses how hot it is (d) has coloured bands
  30. 30.🧩 Which component stores a little charge? (a) buzzer (b) capacitor (c) potentiometer (d) thermistor
  31. 31.True or false: a resistor limits the current. (a) False (b) True
  32. 32.True or false: a resistor stores a little charge. (a) False (b) True
  33. 33.True or false: a diode limits the current. (a) False (b) True
  34. 34.🧩 Which component makes a beeping sound? (a) LDR (b) buzzer (c) diode (d) motor
  35. 35.True or false: a buzzer smooths a wobbly supply. (a) True (b) False
  36. 36.True or false: a thermistor lets current go one way. (a) True (b) False
  37. 37.True or false: a buzzer makes a beeping sound. (a) True (b) False
  38. 38.What does a fuse do? (a) glows using little power (b) makes things spin (c) blows if current is high (d) has coloured bands
  39. 39.🧩 Which part changes electrical energy into movement? (a) a resistor (b) a motor (c) an LED (d) a fuse
  40. 40.🧩 Which component senses how hot it is? (a) buzzer (b) diode (c) LED (d) thermistor

Answer key

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

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