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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 705 · 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 is a resistance knob? (a) capacitor (b) LED (c) LDR (d) potentiometer
  2. 2.True or false: a capacitor smooths a wobbly supply. (a) True (b) False
  3. 3.🧩 Which part changes electrical energy into movement? (a) a resistor (b) a fuse (c) a motor (d) an LED
  4. 4.True or false: an LED boosts a small signal. (a) True (b) False
  5. 5.What does a fuse do? (a) turns a fan or wheels (b) makes a beeping sound (c) blows if current is high (d) stores a little charge
  6. 6.True or false: a potentiometer stores a little charge. (a) True (b) False
  7. 7.What does a potentiometer do? (a) is a resistance knob (b) has coloured bands (c) lets current go one way (d) smooths a wobbly supply
  8. 8.🧩 Which part changes electrical energy into sound? (a) a buzzer (b) a capacitor (c) a diode (d) a resistor
  9. 9.🧩 A capacitor in a circuit can … (a) measure heat (b) make light (c) spin a wheel (d) store charge briefly
  10. 10.True or false: a transistor smooths a wobbly supply. (a) True (b) False
  11. 11.What does a capacitor do? (a) blows if current is high (b) limits the current (c) makes things spin (d) smooths a wobbly supply
  12. 12.True or false: a thermistor senses how hot it is. (a) False (b) True
  13. 13.What does a buzzer do? (a) beeps for an alarm (b) has coloured bands (c) smooths a wobbly supply (d) lets current go one way
  14. 14.🧩 Which component makes things spin? (a) LDR (b) resistor (c) motor (d) thermistor
  15. 15.What does a resistor do? (a) limits the current (b) turns a fan or wheels (c) glows using little power (d) stores a little charge
  16. 16.True or false: a resistor beeps for an alarm. (a) False (b) True
  17. 17.What does a transistor do? (a) beeps for an alarm (b) boosts a small signal (c) makes a beeping sound (d) blows if current is high
  18. 18.What does a resistor do? (a) makes a beeping sound (b) is a resistance knob (c) makes things spin (d) has coloured bands
  19. 19.🧩 Which component has coloured bands? (a) buzzer (b) thermistor (c) transistor (d) resistor
  20. 20.True or false: a transistor has coloured bands. (a) False (b) True
  21. 21.🧩 Which component limits the current? (a) potentiometer (b) thermistor (c) resistor (d) buzzer
  22. 22.True or false: a capacitor stores a little charge. (a) True (b) False
  23. 23.What does a diode do? (a) makes things spin (b) limits the current (c) stores a little charge (d) lets current go one way
  24. 24.🧩 Which component boosts a small signal? (a) thermistor (b) potentiometer (c) transistor (d) diode
  25. 25.🧩 Which component makes a beeping sound? (a) fuse (b) resistor (c) capacitor (d) buzzer
  26. 26.True or false: a transistor boosts a small signal. (a) True (b) False
  27. 27.What does a capacitor do? (a) has coloured bands (b) makes a beeping sound (c) stores a little charge (d) limits the current
  28. 28.What does a motor do? (a) senses how bright it is (b) turns a fan or wheels (c) beeps for an alarm (d) makes a beeping sound
  29. 29.True or false: an LED glows using little power. (a) True (b) False
  30. 30.🧩 Which component turns a fan or wheels? (a) resistor (b) motor (c) LED (d) buzzer
  31. 31.True or false: a resistor limits the current. (a) False (b) True
  32. 32.🧩 Which component glows using little power? (a) resistor (b) LED (c) potentiometer (d) fuse
  33. 33.What does an LED do? (a) is a resistance knob (b) glows using little power (c) blows if current is high (d) smooths a wobbly supply
  34. 34.🧩 Which component senses how hot it is? (a) motor (b) LED (c) capacitor (d) thermistor
  35. 35.What does a motor do? (a) makes things spin (b) boosts a small signal (c) senses how hot it is (d) limits the current
  36. 36.True or false: a capacitor is a resistance knob. (a) True (b) False
  37. 37.🧩 Which component lets current go one way? (a) buzzer (b) diode (c) capacitor (d) LED
  38. 38.True or false: a motor makes things spin. (a) False (b) True
  39. 39.🧩 Which component smooths a wobbly supply? (a) capacitor (b) LED (c) fuse (d) resistor
  40. 40.True or false: a motor senses how hot it is. (a) True (b) False

Answer key

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

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