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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 551 · 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.What does a resistor do? (a) limits the current (b) senses how hot it is (c) turns a fan or wheels (d) makes things spin
  2. 2.🧩 Which component lets current go one way? (a) diode (b) buzzer (c) LDR (d) capacitor
  3. 3.🧩 Which component senses how hot it is? (a) transistor (b) thermistor (c) capacitor (d) resistor
  4. 4.What does a motor do? (a) blows if current is high (b) limits the current (c) makes things spin (d) makes a beeping sound
  5. 5.True or false: a motor senses how hot it is. (a) True (b) False
  6. 6.What does a capacitor do? (a) makes a beeping sound (b) smooths a wobbly supply (c) senses how bright it is (d) boosts a small signal
  7. 7.🧩 A capacitor in a circuit can … (a) make light (b) measure heat (c) spin a wheel (d) store charge briefly
  8. 8.🧩 Which part changes electrical energy into movement? (a) a resistor (b) an LED (c) a motor (d) a fuse
  9. 9.🧩 Which part changes electrical energy into sound? (a) a buzzer (b) a resistor (c) a diode (d) a capacitor
  10. 10.What does a transistor do? (a) beeps for an alarm (b) limits the current (c) turns a fan or wheels (d) boosts a small signal
  11. 11.🧩 Which component beeps for an alarm? (a) transistor (b) diode (c) buzzer (d) LDR
  12. 12.🧩 Which component glows using little power? (a) LED (b) buzzer (c) thermistor (d) resistor
  13. 13.What does an LDR do? (a) stores a little charge (b) has coloured bands (c) smooths a wobbly supply (d) senses how bright it is
  14. 14.What does a fuse do? (a) glows using little power (b) has coloured bands (c) blows if current is high (d) stores a little charge
  15. 15.🧩 Which component blows if current is high? (a) transistor (b) buzzer (c) capacitor (d) fuse
  16. 16.What does an LED do? (a) stores a little charge (b) makes a beeping sound (c) glows using little power (d) beeps for an alarm
  17. 17.What does a buzzer do? (a) boosts a small signal (b) stores a little charge (c) has coloured bands (d) makes a beeping sound
  18. 18.True or false: a diode lets current go one way. (a) False (b) True
  19. 19.True or false: a resistor stores a little charge. (a) True (b) False
  20. 20.True or false: a transistor senses how hot it is. (a) True (b) False
  21. 21.True or false: a motor beeps for an alarm. (a) True (b) False
  22. 22.True or false: a diode has coloured bands. (a) True (b) False
  23. 23.True or false: a resistor limits the current. (a) True (b) False
  24. 24.What does a thermistor do? (a) glows using little power (b) makes a beeping sound (c) limits the current (d) senses how hot it is
  25. 25.True or false: a buzzer smooths a wobbly supply. (a) False (b) True
  26. 26.What does a buzzer do? (a) boosts a small signal (b) beeps for an alarm (c) lets current go one way (d) limits the current
  27. 27.🧩 Which component makes a beeping sound? (a) LDR (b) capacitor (c) fuse (d) buzzer
  28. 28.True or false: a thermistor stores a little charge. (a) True (b) False
  29. 29.🧩 Which component limits the current? (a) fuse (b) thermistor (c) transistor (d) resistor
  30. 30.🧩 Which component senses how bright it is? (a) LED (b) thermistor (c) potentiometer (d) LDR
  31. 31.True or false: a motor has coloured bands. (a) True (b) False
  32. 32.🧩 Which component makes things spin? (a) motor (b) LED (c) resistor (d) transistor
  33. 33.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
  34. 34.True or false: a resistor has coloured bands. (a) True (b) False
  35. 35.True or false: a thermistor senses how hot it is. (a) True (b) False
  36. 36.🧩 Which component is a resistance knob? (a) buzzer (b) potentiometer (c) resistor (d) transistor
  37. 37.True or false: a potentiometer makes a beeping sound. (a) True (b) False
  38. 38.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
  39. 39.What does a resistor do? (a) senses how bright it is (b) makes things spin (c) makes a beeping sound (d) has coloured bands
  40. 40.🧩 Which component has coloured bands? (a) LDR (b) diode (c) thermistor (d) resistor

Answer key

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

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