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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 354 · 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 part changes electrical energy into sound? (a) a diode (b) a resistor (c) a buzzer (d) a capacitor
  2. 2.🧩 Which component blows if current is high? (a) potentiometer (b) LED (c) buzzer (d) fuse
  3. 3.🧩 Which part changes electrical energy into movement? (a) a resistor (b) an LED (c) a motor (d) a fuse
  4. 4.True or false: an LDR stores a little charge. (a) True (b) False
  5. 5.🧩 Which component senses how hot it is? (a) transistor (b) thermistor (c) capacitor (d) potentiometer
  6. 6.🧩 Which component is a resistance knob? (a) resistor (b) potentiometer (c) LED (d) motor
  7. 7.True or false: a thermistor stores a little charge. (a) True (b) False
  8. 8.What does a fuse do? (a) boosts a small signal (b) blows if current is high (c) limits the current (d) has coloured bands
  9. 9.True or false: a transistor makes a beeping sound. (a) True (b) False
  10. 10.True or false: a transistor lets current go one way. (a) False (b) True
  11. 11.🧩 Which component has coloured bands? (a) resistor (b) thermistor (c) LED (d) potentiometer
  12. 12.True or false: a buzzer beeps for an alarm. (a) False (b) True
  13. 13.🧩 Which component smooths a wobbly supply? (a) resistor (b) capacitor (c) motor (d) diode
  14. 14.🧩 A capacitor in a circuit can … (a) measure heat (b) store charge briefly (c) make light (d) spin a wheel
  15. 15.True or false: a diode senses how hot it is. (a) True (b) False
  16. 16.🧩 Which component senses how bright it is? (a) buzzer (b) capacitor (c) LED (d) LDR
  17. 17.🧩 Which component glows using little power? (a) diode (b) fuse (c) LED (d) buzzer
  18. 18.🧩 Which component makes things spin? (a) LED (b) potentiometer (c) motor (d) capacitor
  19. 19.What does a thermistor do? (a) turns a fan or wheels (b) makes things spin (c) glows using little power (d) senses how hot it is
  20. 20.What does a buzzer do? (a) makes a beeping sound (b) smooths a wobbly supply (c) glows using little power (d) limits the current
  21. 21.🧩 Which component turns a fan or wheels? (a) motor (b) resistor (c) thermistor (d) buzzer
  22. 22.What does a capacitor do? (a) beeps for an alarm (b) smooths a wobbly supply (c) senses how bright it is (d) senses how hot it is
  23. 23.🧩 Which component limits the current? (a) LED (b) resistor (c) buzzer (d) potentiometer
  24. 24.🧩 Which component beeps for an alarm? (a) LDR (b) LED (c) diode (d) buzzer
  25. 25.True or false: a transistor stores a little charge. (a) False (b) True
  26. 26.What does a resistor do? (a) smooths a wobbly supply (b) stores a little charge (c) limits the current (d) turns a fan or wheels
  27. 27.True or false: a capacitor makes a beeping sound. (a) False (b) True
  28. 28.What does a diode do? (a) stores a little charge (b) smooths a wobbly supply (c) lets current go one way (d) senses how bright it is
  29. 29.🧩 Which component makes a beeping sound? (a) thermistor (b) buzzer (c) capacitor (d) fuse
  30. 30.What does an LED do? (a) senses how bright it is (b) has coloured bands (c) smooths a wobbly supply (d) glows using little power
  31. 31.🧩 Which component stores a little charge? (a) thermistor (b) diode (c) capacitor (d) fuse
  32. 32.True or false: a resistor blows if current is high. (a) True (b) False
  33. 33.What does a motor do? (a) blows if current is high (b) senses how hot it is (c) smooths a wobbly supply (d) makes things spin
  34. 34.True or false: a capacitor has coloured bands. (a) True (b) False
  35. 35.What does a resistor do? (a) senses how bright it is (b) senses how hot it is (c) turns a fan or wheels (d) has coloured bands
  36. 36.What does a buzzer do? (a) is a resistance knob (b) blows if current is high (c) boosts a small signal (d) beeps for an alarm
  37. 37.True or false: a potentiometer senses how hot it is. (a) True (b) False
  38. 38.🧩 Which component boosts a small signal? (a) transistor (b) capacitor (c) resistor (d) fuse
  39. 39.True or false: a resistor beeps for an alarm. (a) True (b) False
  40. 40.What does an LDR do? (a) senses how bright it is (b) smooths a wobbly supply (c) blows if current is high (d) makes things spin

Answer key

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

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