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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 213 · 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 smooths a wobbly supply? (a) LDR (b) potentiometer (c) fuse (d) capacitor
  2. 2.What does a transistor do? (a) has coloured bands (b) smooths a wobbly supply (c) boosts a small signal (d) beeps for an alarm
  3. 3.🧩 Which part changes electrical energy into movement? (a) a motor (b) an LED (c) a resistor (d) a fuse
  4. 4.What does a diode do? (a) makes a beeping sound (b) makes things spin (c) glows using little power (d) lets current go one way
  5. 5.True or false: a buzzer blows if current is high. (a) False (b) True
  6. 6.True or false: a diode beeps for an alarm. (a) True (b) False
  7. 7.🧩 Which component beeps for an alarm? (a) diode (b) buzzer (c) LDR (d) LED
  8. 8.🧩 A capacitor in a circuit can … (a) spin a wheel (b) measure heat (c) store charge briefly (d) make light
  9. 9.🧩 Which component boosts a small signal? (a) buzzer (b) fuse (c) resistor (d) transistor
  10. 10.🧩 Which component limits the current? (a) capacitor (b) transistor (c) resistor (d) fuse
  11. 11.What does an LED do? (a) has coloured bands (b) boosts a small signal (c) senses how hot it is (d) glows using little power
  12. 12.🧩 Which component makes things spin? (a) thermistor (b) motor (c) transistor (d) potentiometer
  13. 13.🧩 Which component stores a little charge? (a) resistor (b) thermistor (c) LED (d) capacitor
  14. 14.True or false: a potentiometer makes a beeping sound. (a) True (b) False
  15. 15.🧩 Which component makes a beeping sound? (a) resistor (b) LED (c) transistor (d) buzzer
  16. 16.What does a potentiometer do? (a) boosts a small signal (b) lets current go one way (c) is a resistance knob (d) makes things spin
  17. 17.🧩 Which part changes electrical energy into sound? (a) a buzzer (b) a capacitor (c) a diode (d) a resistor
  18. 18.🧩 Which component senses how hot it is? (a) LDR (b) thermistor (c) potentiometer (d) resistor
  19. 19.What does a buzzer do? (a) beeps for an alarm (b) turns a fan or wheels (c) smooths a wobbly supply (d) lets current go one way
  20. 20.True or false: a resistor smooths a wobbly supply. (a) False (b) True
  21. 21.🧩 Which component has coloured bands? (a) fuse (b) motor (c) resistor (d) thermistor
  22. 22.What does a resistor do? (a) glows using little power (b) makes a beeping sound (c) beeps for an alarm (d) has coloured bands
  23. 23.True or false: a motor smooths a wobbly supply. (a) True (b) False
  24. 24.True or false: a potentiometer has coloured bands. (a) True (b) False
  25. 25.What does a fuse do? (a) beeps for an alarm (b) senses how hot it is (c) blows if current is high (d) glows using little power
  26. 26.True or false: a capacitor stores a little charge. (a) False (b) True
  27. 27.True or false: an LED turns a fan or wheels. (a) False (b) True
  28. 28.True or false: a motor makes things spin. (a) False (b) True
  29. 29.What does a thermistor do? (a) smooths a wobbly supply (b) glows using little power (c) is a resistance knob (d) senses how hot it is
  30. 30.True or false: a transistor stores a little charge. (a) True (b) False
  31. 31.What does a resistor do? (a) makes things spin (b) makes a beeping sound (c) limits the current (d) senses how hot it is
  32. 32.🧩 Which component blows if current is high? (a) resistor (b) diode (c) fuse (d) buzzer
  33. 33.True or false: a fuse makes a beeping sound. (a) False (b) True
  34. 34.🧩 Which component senses how bright it is? (a) motor (b) thermistor (c) LDR (d) buzzer
  35. 35.True or false: a diode glows using little power. (a) True (b) False
  36. 36.🧩 Which component turns a fan or wheels? (a) fuse (b) resistor (c) thermistor (d) motor
  37. 37.True or false: a resistor limits the current. (a) False (b) True
  38. 38.True or false: a thermistor makes a beeping sound. (a) False (b) True
  39. 39.True or false: a fuse stores a little charge. (a) True (b) False
  40. 40.🧩 Which component glows using little power? (a) thermistor (b) LED (c) LDR (d) transistor

Answer key

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

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