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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 123 · 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) lets current go one way (b) blows if current is high (c) smooths a wobbly supply (d) boosts a small signal
  2. 2.🧩 Which component stores a little charge? (a) resistor (b) fuse (c) capacitor (d) diode
  3. 3.True or false: a resistor has coloured bands. (a) True (b) False
  4. 4.🧩 Which component lets current go one way? (a) buzzer (b) diode (c) motor (d) resistor
  5. 5.🧩 A capacitor in a circuit can … (a) make light (b) spin a wheel (c) store charge briefly (d) measure heat
  6. 6.🧩 Which component beeps for an alarm? (a) LDR (b) fuse (c) motor (d) buzzer
  7. 7.🧩 Which component makes a beeping sound? (a) buzzer (b) thermistor (c) motor (d) LED
  8. 8.True or false: a buzzer makes a beeping sound. (a) True (b) False
  9. 9.🧩 Which component smooths a wobbly supply? (a) fuse (b) diode (c) potentiometer (d) capacitor
  10. 10.What does a resistor do? (a) glows using little power (b) limits the current (c) makes a beeping sound (d) blows if current is high
  11. 11.True or false: a buzzer limits the current. (a) True (b) False
  12. 12.🧩 Which part changes electrical energy into movement? (a) a fuse (b) a resistor (c) a motor (d) an LED
  13. 13.What does a transistor do? (a) stores a little charge (b) boosts a small signal (c) senses how hot it is (d) has coloured bands
  14. 14.What does a potentiometer do? (a) turns a fan or wheels (b) beeps for an alarm (c) senses how bright it is (d) is a resistance knob
  15. 15.What does a motor do? (a) stores a little charge (b) turns a fan or wheels (c) lets current go one way (d) makes a beeping sound
  16. 16.🧩 Which component senses how bright it is? (a) LDR (b) capacitor (c) motor (d) fuse
  17. 17.What does a diode do? (a) lets current go one way (b) boosts a small signal (c) blows if current is high (d) limits the current
  18. 18.What does a capacitor do? (a) beeps for an alarm (b) stores a little charge (c) lets current go one way (d) makes a beeping sound
  19. 19.True or false: a capacitor senses how bright it is. (a) True (b) False
  20. 20.🧩 Which component senses how hot it is? (a) thermistor (b) diode (c) motor (d) potentiometer
  21. 21.True or false: an LED lets current go one way. (a) True (b) False
  22. 22.True or false: a transistor smooths a wobbly supply. (a) False (b) True
  23. 23.🧩 Which component is a resistance knob? (a) potentiometer (b) LED (c) buzzer (d) transistor
  24. 24.What does a buzzer do? (a) stores a little charge (b) makes a beeping sound (c) senses how hot it is (d) makes things spin
  25. 25.True or false: a potentiometer has coloured bands. (a) True (b) False
  26. 26.🧩 Which component has coloured bands? (a) LED (b) LDR (c) thermistor (d) resistor
  27. 27.What does a buzzer do? (a) senses how bright it is (b) senses how hot it is (c) boosts a small signal (d) beeps for an alarm
  28. 28.🧩 Which part changes electrical energy into sound? (a) a diode (b) a buzzer (c) a capacitor (d) a resistor
  29. 29.🧩 Which component blows if current is high? (a) LED (b) capacitor (c) motor (d) fuse
  30. 30.True or false: a motor makes things spin. (a) True (b) False
  31. 31.True or false: a thermistor beeps for an alarm. (a) False (b) True
  32. 32.True or false: a motor turns a fan or wheels. (a) False (b) True
  33. 33.🧩 Which component limits the current? (a) capacitor (b) resistor (c) potentiometer (d) buzzer
  34. 34.True or false: a diode smooths a wobbly supply. (a) True (b) False
  35. 35.What does an LED do? (a) smooths a wobbly supply (b) senses how bright it is (c) glows using little power (d) senses how hot it is
  36. 36.What does a motor do? (a) lets current go one way (b) makes things spin (c) senses how hot it is (d) blows if current is high
  37. 37.True or false: a capacitor stores a little charge. (a) True (b) False
  38. 38.🧩 Which component turns a fan or wheels? (a) potentiometer (b) LDR (c) buzzer (d) motor
  39. 39.True or false: a thermistor senses how hot it is. (a) True (b) False
  40. 40.🧩 Which component glows using little power? (a) motor (b) LED (c) resistor (d) transistor

Answer key

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

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