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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 173 · 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.🧩 A capacitor in a circuit can … (a) spin a wheel (b) make light (c) store charge briefly (d) measure heat
  2. 2.True or false: an LDR senses how bright it is. (a) False (b) True
  3. 3.What does a fuse do? (a) blows if current is high (b) makes a beeping sound (c) is a resistance knob (d) lets current go one way
  4. 4.True or false: a buzzer makes a beeping sound. (a) False (b) True
  5. 5.🧩 Which component senses how hot it is? (a) transistor (b) LDR (c) thermistor (d) resistor
  6. 6.What does a thermistor do? (a) limits the current (b) senses how bright it is (c) senses how hot it is (d) glows using little power
  7. 7.🧩 Which component makes a beeping sound? (a) diode (b) buzzer (c) resistor (d) motor
  8. 8.True or false: a buzzer smooths a wobbly supply. (a) True (b) False
  9. 9.🧩 Which part changes electrical energy into sound? (a) a buzzer (b) a diode (c) a resistor (d) a capacitor
  10. 10.🧩 Which part changes electrical energy into movement? (a) a motor (b) an LED (c) a resistor (d) a fuse
  11. 11.True or false: a fuse blows if current is high. (a) False (b) True
  12. 12.🧩 Which component stores a little charge? (a) capacitor (b) buzzer (c) motor (d) resistor
  13. 13.What does a buzzer do? (a) senses how bright it is (b) makes a beeping sound (c) glows using little power (d) senses how hot it is
  14. 14.True or false: a diode lets current go one way. (a) True (b) False
  15. 15.What does a transistor do? (a) senses how bright it is (b) boosts a small signal (c) beeps for an alarm (d) blows if current is high
  16. 16.🧩 Which component senses how bright it is? (a) LED (b) LDR (c) transistor (d) fuse
  17. 17.What does a resistor do? (a) is a resistance knob (b) limits the current (c) stores a little charge (d) makes a beeping sound
  18. 18.🧩 Which component smooths a wobbly supply? (a) capacitor (b) buzzer (c) thermistor (d) resistor
  19. 19.🧩 Which component is a resistance knob? (a) potentiometer (b) buzzer (c) resistor (d) diode
  20. 20.🧩 Which component limits the current? (a) potentiometer (b) diode (c) resistor (d) transistor
  21. 21.🧩 Which component lets current go one way? (a) LED (b) transistor (c) fuse (d) diode
  22. 22.🧩 Which component makes things spin? (a) LDR (b) transistor (c) fuse (d) motor
  23. 23.True or false: a capacitor makes things spin. (a) False (b) True
  24. 24.True or false: a diode turns a fan or wheels. (a) True (b) False
  25. 25.What does a capacitor do? (a) glows using little power (b) stores a little charge (c) senses how bright it is (d) senses how hot it is
  26. 26.What does an LDR do? (a) turns a fan or wheels (b) smooths a wobbly supply (c) senses how bright it is (d) makes a beeping sound
  27. 27.True or false: a thermistor boosts a small signal. (a) False (b) True
  28. 28.True or false: a capacitor makes a beeping sound. (a) False (b) True
  29. 29.🧩 Which component glows using little power? (a) thermistor (b) capacitor (c) LED (d) diode
  30. 30.True or false: a motor makes things spin. (a) False (b) True
  31. 31.True or false: a transistor has coloured bands. (a) False (b) True
  32. 32.True or false: a capacitor stores a little charge. (a) False (b) True
  33. 33.What does a buzzer do? (a) beeps for an alarm (b) limits the current (c) makes things spin (d) turns a fan or wheels
  34. 34.🧩 Which component beeps for an alarm? (a) diode (b) motor (c) LDR (d) buzzer
  35. 35.What does a thermistor do? (a) stores a little charge (b) senses how hot it is (c) lets current go one way (d) boosts a small signal
  36. 36.🧩 Which component turns a fan or wheels? (a) buzzer (b) resistor (c) motor (d) fuse
  37. 37.What does a motor do? (a) stores a little charge (b) limits the current (c) makes things spin (d) beeps for an alarm
  38. 38.🧩 Which component has coloured bands? (a) buzzer (b) LED (c) resistor (d) capacitor
  39. 39.True or false: an LED glows using little power. (a) True (b) False
  40. 40.🧩 Which component blows if current is high? (a) fuse (b) potentiometer (c) LDR (d) buzzer

Answer key

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

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