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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 716 · 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 beeps for an alarm? (a) potentiometer (b) buzzer (c) transistor (d) LDR
  2. 2.🧩 Which component glows using little power? (a) LED (b) motor (c) fuse (d) potentiometer
  3. 3.What does a thermistor do? (a) glows using little power (b) makes a beeping sound (c) senses how hot it is (d) lets current go one way
  4. 4.True or false: a resistor beeps for an alarm. (a) False (b) True
  5. 5.What does an LDR do? (a) senses how bright it is (b) is a resistance knob (c) beeps for an alarm (d) senses how hot it is
  6. 6.🧩 A capacitor in a circuit can … (a) store charge briefly (b) spin a wheel (c) make light (d) measure heat
  7. 7.🧩 Which part changes electrical energy into movement? (a) an LED (b) a resistor (c) a fuse (d) a motor
  8. 8.What does a potentiometer do? (a) has coloured bands (b) boosts a small signal (c) senses how bright it is (d) is a resistance knob
  9. 9.🧩 Which component limits the current? (a) capacitor (b) resistor (c) transistor (d) diode
  10. 10.What does a motor do? (a) turns a fan or wheels (b) glows using little power (c) blows if current is high (d) smooths a wobbly supply
  11. 11.True or false: a resistor limits the current. (a) False (b) True
  12. 12.🧩 Which component boosts a small signal? (a) transistor (b) buzzer (c) LDR (d) diode
  13. 13.True or false: a fuse makes a beeping sound. (a) True (b) False
  14. 14.True or false: a thermistor stores a little charge. (a) False (b) True
  15. 15.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a capacitor (c) a diode (d) a buzzer
  16. 16.True or false: a potentiometer stores a little charge. (a) True (b) False
  17. 17.True or false: a diode limits the current. (a) False (b) True
  18. 18.True or false: an LED glows using little power. (a) False (b) True
  19. 19.True or false: a buzzer makes a beeping sound. (a) False (b) True
  20. 20.What does a buzzer do? (a) limits the current (b) stores a little charge (c) blows if current is high (d) makes a beeping sound
  21. 21.🧩 Which component stores a little charge? (a) LED (b) buzzer (c) potentiometer (d) capacitor
  22. 22.What does a buzzer do? (a) turns a fan or wheels (b) limits the current (c) beeps for an alarm (d) smooths a wobbly supply
  23. 23.True or false: a potentiometer is a resistance knob. (a) False (b) True
  24. 24.🧩 Which component senses how hot it is? (a) fuse (b) thermistor (c) transistor (d) resistor
  25. 25.🧩 Which component lets current go one way? (a) buzzer (b) LED (c) thermistor (d) diode
  26. 26.True or false: a resistor is a resistance knob. (a) False (b) True
  27. 27.🧩 Which component senses how bright it is? (a) fuse (b) resistor (c) LDR (d) potentiometer
  28. 28.🧩 Which component smooths a wobbly supply? (a) diode (b) transistor (c) capacitor (d) thermistor
  29. 29.What does a transistor do? (a) senses how hot it is (b) boosts a small signal (c) beeps for an alarm (d) makes things spin
  30. 30.True or false: a transistor turns a fan or wheels. (a) True (b) False
  31. 31.True or false: a thermistor makes things spin. (a) False (b) True
  32. 32.What does a capacitor do? (a) is a resistance knob (b) makes a beeping sound (c) smooths a wobbly supply (d) boosts a small signal
  33. 33.True or false: a thermistor senses how hot it is. (a) True (b) False
  34. 34.True or false: a capacitor stores a little charge. (a) False (b) True
  35. 35.🧩 Which component makes things spin? (a) capacitor (b) motor (c) fuse (d) diode
  36. 36.True or false: a resistor smooths a wobbly supply. (a) False (b) True
  37. 37.What does a resistor do? (a) is a resistance knob (b) limits the current (c) makes a beeping sound (d) blows if current is high
  38. 38.🧩 Which component makes a beeping sound? (a) LED (b) fuse (c) thermistor (d) buzzer
  39. 39.True or false: a motor turns a fan or wheels. (a) True (b) False
  40. 40.🧩 Which component turns a fan or wheels? (a) buzzer (b) motor (c) transistor (d) diode

Answer key

  1. buzzer
  2. LED
  3. senses how hot it is
  4. False
  5. senses how bright it is
  6. store charge briefly
  7. a motor
  8. is a resistance knob
  9. resistor
  10. turns a fan or wheels
  11. True
  12. transistor
  13. False
  14. False
  15. a buzzer
  16. False
  17. False
  18. True
  19. True
  20. makes a beeping sound
  21. capacitor
  22. beeps for an alarm
  23. True
  24. thermistor
  25. diode
  26. False
  27. LDR
  28. capacitor
  29. boosts a small signal
  30. False
  31. False
  32. smooths a wobbly supply
  33. True
  34. True
  35. motor
  36. False
  37. limits the current
  38. buzzer
  39. True
  40. motor

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