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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 328 · 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) measure heat (b) make light (c) store charge briefly (d) spin a wheel
  2. 2.🧩 Which part changes electrical energy into movement? (a) a fuse (b) a resistor (c) an LED (d) a motor
  3. 3.True or false: an LED makes a beeping sound. (a) True (b) False
  4. 4.True or false: a capacitor stores a little charge. (a) True (b) False
  5. 5.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a resistor (c) a buzzer (d) a diode
  6. 6.True or false: a potentiometer is a resistance knob. (a) False (b) True
  7. 7.What does a diode do? (a) stores a little charge (b) lets current go one way (c) turns a fan or wheels (d) makes a beeping sound
  8. 8.True or false: a capacitor limits the current. (a) True (b) False
  9. 9.True or false: a buzzer glows using little power. (a) False (b) True
  10. 10.🧩 Which component makes a beeping sound? (a) diode (b) capacitor (c) buzzer (d) motor
  11. 11.What does an LED do? (a) lets current go one way (b) boosts a small signal (c) senses how hot it is (d) glows using little power
  12. 12.True or false: a thermistor boosts a small signal. (a) False (b) True
  13. 13.🧩 Which component blows if current is high? (a) transistor (b) buzzer (c) fuse (d) potentiometer
  14. 14.True or false: a motor turns a fan or wheels. (a) True (b) False
  15. 15.True or false: an LDR smooths a wobbly supply. (a) True (b) False
  16. 16.🧩 Which component has coloured bands? (a) LDR (b) fuse (c) resistor (d) diode
  17. 17.True or false: a motor makes things spin. (a) False (b) True
  18. 18.True or false: a thermistor senses how hot it is. (a) False (b) True
  19. 19.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
  20. 20.What does a resistor do? (a) blows if current is high (b) makes a beeping sound (c) beeps for an alarm (d) has coloured bands
  21. 21.🧩 Which component stores a little charge? (a) resistor (b) fuse (c) capacitor (d) LED
  22. 22.What does a capacitor do? (a) makes a beeping sound (b) beeps for an alarm (c) stores a little charge (d) turns a fan or wheels
  23. 23.What does a potentiometer do? (a) glows using little power (b) beeps for an alarm (c) limits the current (d) is a resistance knob
  24. 24.True or false: a buzzer makes a beeping sound. (a) False (b) True
  25. 25.What does a buzzer do? (a) beeps for an alarm (b) senses how bright it is (c) turns a fan or wheels (d) boosts a small signal
  26. 26.What does a transistor do? (a) smooths a wobbly supply (b) beeps for an alarm (c) boosts a small signal (d) senses how bright it is
  27. 27.🧩 Which component beeps for an alarm? (a) capacitor (b) potentiometer (c) buzzer (d) LED
  28. 28.True or false: a buzzer senses how hot it is. (a) True (b) False
  29. 29.🧩 Which component glows using little power? (a) resistor (b) motor (c) LED (d) potentiometer
  30. 30.True or false: a capacitor beeps for an alarm. (a) False (b) True
  31. 31.🧩 Which component limits the current? (a) transistor (b) motor (c) capacitor (d) resistor
  32. 32.🧩 Which component turns a fan or wheels? (a) diode (b) LDR (c) fuse (d) motor
  33. 33.True or false: a fuse is a resistance knob. (a) True (b) False
  34. 34.🧩 Which component smooths a wobbly supply? (a) resistor (b) capacitor (c) motor (d) diode
  35. 35.True or false: a thermistor stores a little charge. (a) False (b) True
  36. 36.🧩 Which component lets current go one way? (a) motor (b) resistor (c) transistor (d) diode
  37. 37.True or false: a potentiometer makes a beeping sound. (a) False (b) True
  38. 38.True or false: a transistor boosts a small signal. (a) False (b) True
  39. 39.True or false: a motor smooths a wobbly supply. (a) True (b) False
  40. 40.True or false: a fuse blows if current is high. (a) True (b) False

Answer key

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

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