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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 559 · 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 makes things spin? (a) motor (b) fuse (c) buzzer (d) LED
  2. 2.🧩 Which component turns a fan or wheels? (a) fuse (b) resistor (c) transistor (d) motor
  3. 3.What does a resistor do? (a) smooths a wobbly supply (b) is a resistance knob (c) has coloured bands (d) makes things spin
  4. 4.True or false: a capacitor beeps for an alarm. (a) True (b) False
  5. 5.True or false: a buzzer senses how hot it is. (a) True (b) False
  6. 6.🧩 Which component is a resistance knob? (a) thermistor (b) buzzer (c) potentiometer (d) LED
  7. 7.🧩 Which part changes electrical energy into movement? (a) a resistor (b) a motor (c) a fuse (d) an LED
  8. 8.🧩 A capacitor in a circuit can … (a) measure heat (b) make light (c) spin a wheel (d) store charge briefly
  9. 9.What does an LDR do? (a) beeps for an alarm (b) lets current go one way (c) is a resistance knob (d) senses how bright it is
  10. 10.🧩 Which part changes electrical energy into sound? (a) a buzzer (b) a capacitor (c) a resistor (d) a diode
  11. 11.True or false: a buzzer smooths a wobbly supply. (a) False (b) True
  12. 12.🧩 Which component beeps for an alarm? (a) LDR (b) potentiometer (c) diode (d) buzzer
  13. 13.🧩 Which component boosts a small signal? (a) capacitor (b) transistor (c) motor (d) potentiometer
  14. 14.True or false: a transistor senses how bright it is. (a) False (b) True
  15. 15.What does a capacitor do? (a) makes things spin (b) boosts a small signal (c) is a resistance knob (d) stores a little charge
  16. 16.True or false: a transistor has coloured bands. (a) False (b) True
  17. 17.True or false: a fuse has coloured bands. (a) False (b) True
  18. 18.What does a transistor do? (a) makes things spin (b) is a resistance knob (c) turns a fan or wheels (d) boosts a small signal
  19. 19.What does a fuse do? (a) stores a little charge (b) is a resistance knob (c) blows if current is high (d) limits the current
  20. 20.What does a capacitor do? (a) boosts a small signal (b) blows if current is high (c) smooths a wobbly supply (d) glows using little power
  21. 21.What does a diode do? (a) glows using little power (b) boosts a small signal (c) lets current go one way (d) limits the current
  22. 22.🧩 Which component senses how bright it is? (a) fuse (b) capacitor (c) LDR (d) LED
  23. 23.True or false: a buzzer beeps for an alarm. (a) True (b) False
  24. 24.What does a buzzer do? (a) stores a little charge (b) limits the current (c) makes a beeping sound (d) senses how hot it is
  25. 25.What does an LED do? (a) glows using little power (b) blows if current is high (c) smooths a wobbly supply (d) makes things spin
  26. 26.True or false: a thermistor senses how hot it is. (a) False (b) True
  27. 27.True or false: a potentiometer makes a beeping sound. (a) False (b) True
  28. 28.🧩 Which component blows if current is high? (a) motor (b) buzzer (c) fuse (d) LDR
  29. 29.🧩 Which component makes a beeping sound? (a) buzzer (b) potentiometer (c) LED (d) fuse
  30. 30.What does a buzzer do? (a) smooths a wobbly supply (b) blows if current is high (c) senses how bright it is (d) beeps for an alarm
  31. 31.What does a resistor do? (a) boosts a small signal (b) limits the current (c) beeps for an alarm (d) is a resistance knob
  32. 32.True or false: a diode senses how hot it is. (a) False (b) True
  33. 33.True or false: a capacitor makes things spin. (a) True (b) False
  34. 34.True or false: a diode lets current go one way. (a) True (b) False
  35. 35.True or false: a capacitor smooths a wobbly supply. (a) True (b) False
  36. 36.True or false: a diode has coloured bands. (a) True (b) False
  37. 37.What does a motor do? (a) makes things spin (b) blows if current is high (c) lets current go one way (d) limits the current
  38. 38.True or false: a motor makes things spin. (a) False (b) True
  39. 39.🧩 Which component senses how hot it is? (a) buzzer (b) fuse (c) thermistor (d) diode
  40. 40.True or false: a capacitor lets current go one way. (a) True (b) False

Answer key

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

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