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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 400 · 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) measure heat (d) store charge briefly
  2. 2.🧩 Which component limits the current? (a) capacitor (b) fuse (c) diode (d) resistor
  3. 3.What does a thermistor do? (a) makes things spin (b) senses how hot it is (c) beeps for an alarm (d) boosts a small signal
  4. 4.🧩 Which component makes a beeping sound? (a) LDR (b) fuse (c) thermistor (d) buzzer
  5. 5.What does a potentiometer do? (a) boosts a small signal (b) is a resistance knob (c) makes a beeping sound (d) smooths a wobbly supply
  6. 6.🧩 Which component beeps for an alarm? (a) capacitor (b) LDR (c) buzzer (d) resistor
  7. 7.What does an LED do? (a) glows using little power (b) makes a beeping sound (c) has coloured bands (d) lets current go one way
  8. 8.🧩 Which component is a resistance knob? (a) thermistor (b) potentiometer (c) buzzer (d) LDR
  9. 9.What does a buzzer do? (a) stores a little charge (b) beeps for an alarm (c) senses how bright it is (d) blows if current is high
  10. 10.🧩 Which component blows if current is high? (a) buzzer (b) fuse (c) capacitor (d) thermistor
  11. 11.What does a diode do? (a) turns a fan or wheels (b) stores a little charge (c) lets current go one way (d) smooths a wobbly supply
  12. 12.What does a fuse do? (a) senses how bright it is (b) makes a beeping sound (c) turns a fan or wheels (d) blows if current is high
  13. 13.True or false: a resistor stores a little charge. (a) True (b) False
  14. 14.True or false: a diode lets current go one way. (a) True (b) False
  15. 15.🧩 Which component senses how hot it is? (a) capacitor (b) thermistor (c) resistor (d) potentiometer
  16. 16.🧩 Which component lets current go one way? (a) buzzer (b) transistor (c) diode (d) LDR
  17. 17.What does a resistor do? (a) glows using little power (b) blows if current is high (c) limits the current (d) senses how bright it is
  18. 18.🧩 Which component senses how bright it is? (a) motor (b) resistor (c) LED (d) LDR
  19. 19.What does a buzzer do? (a) makes a beeping sound (b) stores a little charge (c) has coloured bands (d) is a resistance knob
  20. 20.True or false: a thermistor has coloured bands. (a) True (b) False
  21. 21.🧩 Which component boosts a small signal? (a) diode (b) transistor (c) buzzer (d) LDR
  22. 22.What does an LDR do? (a) smooths a wobbly supply (b) senses how bright it is (c) stores a little charge (d) has coloured bands
  23. 23.True or false: a buzzer makes a beeping sound. (a) False (b) True
  24. 24.True or false: a buzzer smooths a wobbly supply. (a) False (b) True
  25. 25.True or false: an LED glows using little power. (a) False (b) True
  26. 26.🧩 Which component glows using little power? (a) capacitor (b) LED (c) thermistor (d) transistor
  27. 27.True or false: a resistor senses how bright it is. (a) False (b) True
  28. 28.🧩 Which part changes electrical energy into sound? (a) a buzzer (b) a diode (c) a resistor (d) a capacitor
  29. 29.🧩 Which part changes electrical energy into movement? (a) a fuse (b) a motor (c) a resistor (d) an LED
  30. 30.True or false: an LDR blows if current is high. (a) False (b) True
  31. 31.True or false: a diode makes things spin. (a) False (b) True
  32. 32.True or false: a capacitor glows using little power. (a) False (b) True
  33. 33.True or false: a motor makes things spin. (a) True (b) False
  34. 34.What does a transistor do? (a) makes a beeping sound (b) has coloured bands (c) stores a little charge (d) boosts a small signal
  35. 35.True or false: a potentiometer smooths a wobbly supply. (a) False (b) True
  36. 36.True or false: a buzzer turns a fan or wheels. (a) False (b) True
  37. 37.What does a resistor do? (a) beeps for an alarm (b) has coloured bands (c) glows using little power (d) boosts a small signal
  38. 38.🧩 Which component makes things spin? (a) motor (b) fuse (c) thermistor (d) LDR
  39. 39.True or false: a capacitor senses how bright it is. (a) True (b) False
  40. 40.True or false: a resistor turns a fan or wheels. (a) False (b) True

Answer key

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

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