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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 394 · 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 glows using little power? (a) potentiometer (b) diode (c) capacitor (d) LED
  2. 2.🧩 Which component blows if current is high? (a) transistor (b) fuse (c) thermistor (d) diode
  3. 3.🧩 A capacitor in a circuit can … (a) store charge briefly (b) make light (c) measure heat (d) spin a wheel
  4. 4.What does a buzzer do? (a) glows using little power (b) is a resistance knob (c) beeps for an alarm (d) limits the current
  5. 5.What does a capacitor do? (a) stores a little charge (b) lets current go one way (c) has coloured bands (d) turns a fan or wheels
  6. 6.True or false: a motor senses how hot it is. (a) True (b) False
  7. 7.What does a diode do? (a) senses how hot it is (b) is a resistance knob (c) lets current go one way (d) boosts a small signal
  8. 8.🧩 Which component makes a beeping sound? (a) potentiometer (b) diode (c) motor (d) buzzer
  9. 9.True or false: a diode lets current go one way. (a) False (b) True
  10. 10.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a diode (c) a resistor (d) a buzzer
  11. 11.What does a buzzer do? (a) boosts a small signal (b) turns a fan or wheels (c) has coloured bands (d) makes a beeping sound
  12. 12.🧩 Which part changes electrical energy into movement? (a) an LED (b) a fuse (c) a resistor (d) a motor
  13. 13.What does a transistor do? (a) glows using little power (b) is a resistance knob (c) boosts a small signal (d) makes things spin
  14. 14.True or false: a resistor limits the current. (a) False (b) True
  15. 15.What does a motor do? (a) beeps for an alarm (b) blows if current is high (c) smooths a wobbly supply (d) turns a fan or wheels
  16. 16.True or false: a motor turns a fan or wheels. (a) True (b) False
  17. 17.True or false: a fuse blows if current is high. (a) True (b) False
  18. 18.🧩 Which component has coloured bands? (a) motor (b) buzzer (c) resistor (d) diode
  19. 19.What does a thermistor do? (a) senses how hot it is (b) makes a beeping sound (c) is a resistance knob (d) smooths a wobbly supply
  20. 20.True or false: a transistor stores a little charge. (a) False (b) True
  21. 21.True or false: an LED glows using little power. (a) False (b) True
  22. 22.🧩 Which component limits the current? (a) buzzer (b) LDR (c) thermistor (d) resistor
  23. 23.What does an LED do? (a) makes things spin (b) glows using little power (c) limits the current (d) lets current go one way
  24. 24.What does a fuse do? (a) makes a beeping sound (b) glows using little power (c) blows if current is high (d) lets current go one way
  25. 25.True or false: a resistor makes things spin. (a) False (b) True
  26. 26.True or false: a buzzer beeps for an alarm. (a) False (b) True
  27. 27.True or false: a motor makes things spin. (a) False (b) True
  28. 28.True or false: an LDR turns a fan or wheels. (a) False (b) True
  29. 29.🧩 Which component turns a fan or wheels? (a) motor (b) resistor (c) thermistor (d) buzzer
  30. 30.True or false: a resistor has coloured bands. (a) True (b) False
  31. 31.🧩 Which component is a resistance knob? (a) potentiometer (b) motor (c) thermistor (d) resistor
  32. 32.True or false: a potentiometer stores a little charge. (a) False (b) True
  33. 33.True or false: a buzzer stores a little charge. (a) False (b) True
  34. 34.🧩 Which component senses how bright it is? (a) LDR (b) fuse (c) resistor (d) diode
  35. 35.True or false: an LDR senses how hot it is. (a) False (b) True
  36. 36.What does a potentiometer do? (a) is a resistance knob (b) makes a beeping sound (c) blows if current is high (d) senses how bright it is
  37. 37.🧩 Which component boosts a small signal? (a) thermistor (b) potentiometer (c) resistor (d) transistor
  38. 38.True or false: a thermistor senses how hot it is. (a) False (b) True
  39. 39.🧩 Which component senses how hot it is? (a) buzzer (b) capacitor (c) resistor (d) thermistor
  40. 40.True or false: a thermistor limits the current. (a) False (b) True

Answer key

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

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