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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 387 · 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 fuse do? (a) blows if current is high (b) lets current go one way (c) limits the current (d) makes a beeping sound
  2. 2.🧩 Which component limits the current? (a) buzzer (b) resistor (c) capacitor (d) LED
  3. 3.🧩 Which component boosts a small signal? (a) buzzer (b) LED (c) transistor (d) diode
  4. 4.True or false: a potentiometer smooths a wobbly supply. (a) True (b) False
  5. 5.True or false: a resistor senses how hot it is. (a) True (b) False
  6. 6.🧩 Which component senses how hot it is? (a) transistor (b) thermistor (c) LED (d) motor
  7. 7.What does a potentiometer do? (a) is a resistance knob (b) limits the current (c) makes a beeping sound (d) senses how bright it is
  8. 8.What does a diode do? (a) makes things spin (b) lets current go one way (c) beeps for an alarm (d) has coloured bands
  9. 9.🧩 Which component smooths a wobbly supply? (a) thermistor (b) resistor (c) capacitor (d) buzzer
  10. 10.What does a thermistor do? (a) limits the current (b) stores a little charge (c) has coloured bands (d) senses how hot it is
  11. 11.True or false: a potentiometer is a resistance knob. (a) False (b) True
  12. 12.🧩 Which part changes electrical energy into movement? (a) an LED (b) a fuse (c) a motor (d) a resistor
  13. 13.True or false: a buzzer turns a fan or wheels. (a) True (b) False
  14. 14.🧩 Which part changes electrical energy into sound? (a) a buzzer (b) a resistor (c) a capacitor (d) a diode
  15. 15.What does an LDR do? (a) makes a beeping sound (b) blows if current is high (c) smooths a wobbly supply (d) senses how bright it is
  16. 16.True or false: a buzzer makes a beeping sound. (a) True (b) False
  17. 17.What does an LED do? (a) senses how hot it is (b) smooths a wobbly supply (c) glows using little power (d) lets current go one way
  18. 18.What does a transistor do? (a) blows if current is high (b) boosts a small signal (c) lets current go one way (d) stores a little charge
  19. 19.True or false: a thermistor senses how hot it is. (a) True (b) False
  20. 20.True or false: a thermistor is a resistance knob. (a) True (b) False
  21. 21.True or false: an LED glows using little power. (a) False (b) True
  22. 22.What does a resistor do? (a) has coloured bands (b) beeps for an alarm (c) lets current go one way (d) senses how bright it is
  23. 23.🧩 A capacitor in a circuit can … (a) spin a wheel (b) measure heat (c) store charge briefly (d) make light
  24. 24.What does a motor do? (a) senses how hot it is (b) is a resistance knob (c) makes things spin (d) glows using little power
  25. 25.What does a buzzer do? (a) stores a little charge (b) senses how hot it is (c) makes things spin (d) beeps for an alarm
  26. 26.True or false: a transistor glows using little power. (a) True (b) False
  27. 27.True or false: an LED smooths a wobbly supply. (a) False (b) True
  28. 28.🧩 Which component stores a little charge? (a) capacitor (b) motor (c) resistor (d) diode
  29. 29.🧩 Which component is a resistance knob? (a) buzzer (b) resistor (c) potentiometer (d) LED
  30. 30.True or false: a transistor boosts a small signal. (a) False (b) True
  31. 31.🧩 Which component senses how bright it is? (a) potentiometer (b) thermistor (c) capacitor (d) LDR
  32. 32.🧩 Which component makes a beeping sound? (a) buzzer (b) potentiometer (c) transistor (d) capacitor
  33. 33.🧩 Which component lets current go one way? (a) LED (b) thermistor (c) capacitor (d) diode
  34. 34.🧩 Which component turns a fan or wheels? (a) fuse (b) transistor (c) motor (d) capacitor
  35. 35.True or false: a motor has coloured bands. (a) True (b) False
  36. 36.True or false: a diode lets current go one way. (a) False (b) True
  37. 37.True or false: a resistor has coloured bands. (a) True (b) False
  38. 38.🧩 Which component blows if current is high? (a) buzzer (b) fuse (c) potentiometer (d) LED
  39. 39.True or false: a buzzer stores a little charge. (a) False (b) True
  40. 40.True or false: a buzzer blows if current is high. (a) False (b) True

Answer key

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

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