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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 555 · 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 stores a little charge? (a) fuse (b) LDR (c) thermistor (d) capacitor
  2. 2.True or false: a diode makes a beeping sound. (a) True (b) False
  3. 3.True or false: a capacitor limits the current. (a) True (b) False
  4. 4.🧩 A capacitor in a circuit can … (a) make light (b) spin a wheel (c) store charge briefly (d) measure heat
  5. 5.🧩 Which part changes electrical energy into movement? (a) a motor (b) an LED (c) a fuse (d) a resistor
  6. 6.True or false: an LED is a resistance knob. (a) True (b) False
  7. 7.True or false: a buzzer makes a beeping sound. (a) False (b) True
  8. 8.True or false: a capacitor senses how hot it is. (a) False (b) True
  9. 9.🧩 Which component beeps for an alarm? (a) buzzer (b) thermistor (c) transistor (d) capacitor
  10. 10.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a resistor (c) a diode (d) a buzzer
  11. 11.🧩 Which component limits the current? (a) resistor (b) fuse (c) diode (d) transistor
  12. 12.What does a diode do? (a) stores a little charge (b) makes a beeping sound (c) lets current go one way (d) limits the current
  13. 13.What does a fuse do? (a) beeps for an alarm (b) boosts a small signal (c) lets current go one way (d) blows if current is high
  14. 14.What does a thermistor do? (a) makes things spin (b) stores a little charge (c) makes a beeping sound (d) senses how hot it is
  15. 15.🧩 Which component makes a beeping sound? (a) motor (b) potentiometer (c) thermistor (d) buzzer
  16. 16.🧩 Which component blows if current is high? (a) motor (b) buzzer (c) LDR (d) fuse
  17. 17.🧩 Which component is a resistance knob? (a) capacitor (b) motor (c) potentiometer (d) buzzer
  18. 18.🧩 Which component turns a fan or wheels? (a) motor (b) LDR (c) LED (d) capacitor
  19. 19.True or false: a thermistor makes things spin. (a) True (b) False
  20. 20.True or false: a transistor lets current go one way. (a) False (b) True
  21. 21.What does a motor do? (a) senses how bright it is (b) senses how hot it is (c) makes things spin (d) blows if current is high
  22. 22.True or false: a motor senses how hot it is. (a) True (b) False
  23. 23.🧩 Which component makes things spin? (a) LED (b) buzzer (c) motor (d) fuse
  24. 24.True or false: a motor turns a fan or wheels. (a) False (b) True
  25. 25.🧩 Which component senses how bright it is? (a) fuse (b) transistor (c) resistor (d) LDR
  26. 26.True or false: a potentiometer senses how bright it is. (a) False (b) True
  27. 27.🧩 Which component smooths a wobbly supply? (a) fuse (b) potentiometer (c) diode (d) capacitor
  28. 28.True or false: a buzzer senses how bright it is. (a) True (b) False
  29. 29.True or false: a transistor smooths a wobbly supply. (a) False (b) True
  30. 30.What does an LED do? (a) glows using little power (b) has coloured bands (c) boosts a small signal (d) smooths a wobbly supply
  31. 31.What does a transistor do? (a) boosts a small signal (b) makes things spin (c) has coloured bands (d) lets current go one way
  32. 32.What does a motor do? (a) limits the current (b) senses how hot it is (c) blows if current is high (d) turns a fan or wheels
  33. 33.True or false: a potentiometer beeps for an alarm. (a) False (b) True
  34. 34.🧩 Which component glows using little power? (a) resistor (b) capacitor (c) LED (d) motor
  35. 35.True or false: a fuse has coloured bands. (a) True (b) False
  36. 36.True or false: a transistor beeps for an alarm. (a) False (b) True
  37. 37.True or false: an LED glows using little power. (a) False (b) True
  38. 38.What does a buzzer do? (a) senses how bright it is (b) makes things spin (c) beeps for an alarm (d) boosts a small signal
  39. 39.What does a resistor do? (a) makes a beeping sound (b) is a resistance knob (c) lets current go one way (d) has coloured bands
  40. 40.True or false: a resistor limits the current. (a) False (b) True

Answer key

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

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