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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 351 · 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 a beeping sound? (a) LDR (b) LED (c) diode (d) buzzer
  2. 2.🧩 Which component limits the current? (a) capacitor (b) resistor (c) LDR (d) buzzer
  3. 3.What does a diode do? (a) has coloured bands (b) stores a little charge (c) beeps for an alarm (d) lets current go one way
  4. 4.True or false: an LDR glows using little power. (a) False (b) True
  5. 5.What does a capacitor do? (a) makes things spin (b) senses how hot it is (c) blows if current is high (d) smooths a wobbly supply
  6. 6.🧩 Which part changes electrical energy into movement? (a) a motor (b) a resistor (c) an LED (d) a fuse
  7. 7.🧩 Which component has coloured bands? (a) capacitor (b) resistor (c) fuse (d) transistor
  8. 8.🧩 Which component beeps for an alarm? (a) resistor (b) transistor (c) LDR (d) buzzer
  9. 9.🧩 Which part changes electrical energy into sound? (a) a buzzer (b) a diode (c) a resistor (d) a capacitor
  10. 10.True or false: a diode lets current go one way. (a) True (b) False
  11. 11.🧩 Which component smooths a wobbly supply? (a) resistor (b) transistor (c) LED (d) capacitor
  12. 12.What does a transistor do? (a) stores a little charge (b) makes things spin (c) boosts a small signal (d) is a resistance knob
  13. 13.What does a fuse do? (a) smooths a wobbly supply (b) blows if current is high (c) has coloured bands (d) beeps for an alarm
  14. 14.True or false: a resistor limits the current. (a) True (b) False
  15. 15.🧩 Which component turns a fan or wheels? (a) resistor (b) LED (c) fuse (d) motor
  16. 16.🧩 Which component senses how hot it is? (a) fuse (b) thermistor (c) capacitor (d) motor
  17. 17.🧩 A capacitor in a circuit can … (a) store charge briefly (b) make light (c) measure heat (d) spin a wheel
  18. 18.🧩 Which component is a resistance knob? (a) buzzer (b) transistor (c) potentiometer (d) LDR
  19. 19.True or false: an LDR limits the current. (a) False (b) True
  20. 20.True or false: a transistor boosts a small signal. (a) True (b) False
  21. 21.What does an LDR do? (a) senses how bright it is (b) makes a beeping sound (c) boosts a small signal (d) has coloured bands
  22. 22.True or false: a resistor lets current go one way. (a) True (b) False
  23. 23.🧩 Which component boosts a small signal? (a) thermistor (b) capacitor (c) transistor (d) buzzer
  24. 24.True or false: a fuse blows if current is high. (a) True (b) False
  25. 25.What does a potentiometer do? (a) is a resistance knob (b) turns a fan or wheels (c) blows if current is high (d) beeps for an alarm
  26. 26.True or false: a transistor beeps for an alarm. (a) True (b) False
  27. 27.True or false: a resistor has coloured bands. (a) True (b) False
  28. 28.🧩 Which component blows if current is high? (a) motor (b) capacitor (c) transistor (d) fuse
  29. 29.True or false: a thermistor limits the current. (a) True (b) False
  30. 30.What does a thermistor do? (a) boosts a small signal (b) makes a beeping sound (c) blows if current is high (d) senses how hot it is
  31. 31.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
  32. 32.True or false: an LED turns a fan or wheels. (a) False (b) True
  33. 33.True or false: an LDR turns a fan or wheels. (a) False (b) True
  34. 34.🧩 Which component senses how bright it is? (a) motor (b) diode (c) LDR (d) thermistor
  35. 35.What does a buzzer do? (a) senses how hot it is (b) limits the current (c) senses how bright it is (d) beeps for an alarm
  36. 36.True or false: a capacitor limits the current. (a) True (b) False
  37. 37.True or false: a diode has coloured bands. (a) False (b) True
  38. 38.What does a motor do? (a) stores a little charge (b) senses how bright it is (c) makes things spin (d) limits the current
  39. 39.True or false: an LED senses how hot it is. (a) False (b) True
  40. 40.🧩 Which component stores a little charge? (a) diode (b) capacitor (c) potentiometer (d) LDR

Answer key

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

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