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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 589 · 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) make light (b) measure heat (c) store charge briefly (d) spin a wheel
  2. 2.🧩 Which component limits the current? (a) transistor (b) motor (c) resistor (d) capacitor
  3. 3.What does a capacitor do? (a) glows using little power (b) senses how bright it is (c) smooths a wobbly supply (d) is a resistance knob
  4. 4.True or false: a buzzer senses how bright it is. (a) True (b) False
  5. 5.🧩 Which component has coloured bands? (a) fuse (b) LED (c) transistor (d) resistor
  6. 6.🧩 Which component senses how bright it is? (a) motor (b) LDR (c) buzzer (d) LED
  7. 7.🧩 Which component lets current go one way? (a) thermistor (b) diode (c) LED (d) capacitor
  8. 8.What does a diode do? (a) lets current go one way (b) boosts a small signal (c) senses how bright it is (d) smooths a wobbly supply
  9. 9.True or false: a capacitor is a resistance knob. (a) False (b) True
  10. 10.True or false: a buzzer senses how hot it is. (a) False (b) True
  11. 11.🧩 Which component smooths a wobbly supply? (a) capacitor (b) LED (c) resistor (d) diode
  12. 12.True or false: a diode smooths a wobbly supply. (a) False (b) True
  13. 13.True or false: a resistor glows using little power. (a) False (b) True
  14. 14.🧩 Which component boosts a small signal? (a) motor (b) LDR (c) transistor (d) potentiometer
  15. 15.What does an LDR do? (a) senses how bright it is (b) limits the current (c) glows using little power (d) boosts a small signal
  16. 16.True or false: a potentiometer senses how bright it is. (a) True (b) False
  17. 17.True or false: an LED glows using little power. (a) True (b) False
  18. 18.True or false: a resistor limits the current. (a) False (b) True
  19. 19.What does a transistor do? (a) turns a fan or wheels (b) stores a little charge (c) is a resistance knob (d) boosts a small signal
  20. 20.What does a capacitor do? (a) boosts a small signal (b) blows if current is high (c) stores a little charge (d) makes things spin
  21. 21.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a buzzer (c) a diode (d) a capacitor
  22. 22.What does a buzzer do? (a) stores a little charge (b) makes things spin (c) glows using little power (d) beeps for an alarm
  23. 23.True or false: a capacitor beeps for an alarm. (a) False (b) True
  24. 24.True or false: a potentiometer is a resistance knob. (a) False (b) True
  25. 25.True or false: a resistor senses how hot it is. (a) False (b) True
  26. 26.🧩 Which part changes electrical energy into movement? (a) an LED (b) a fuse (c) a resistor (d) a motor
  27. 27.🧩 Which component makes a beeping sound? (a) fuse (b) capacitor (c) buzzer (d) LED
  28. 28.True or false: a thermistor senses how hot it is. (a) True (b) False
  29. 29.What does a resistor do? (a) makes a beeping sound (b) limits the current (c) senses how bright it is (d) stores a little charge
  30. 30.What does a resistor do? (a) blows if current is high (b) has coloured bands (c) senses how bright it is (d) beeps for an alarm
  31. 31.True or false: a motor turns a fan or wheels. (a) False (b) True
  32. 32.True or false: a capacitor boosts a small signal. (a) True (b) False
  33. 33.🧩 Which component glows using little power? (a) diode (b) resistor (c) LED (d) fuse
  34. 34.What does a potentiometer do? (a) boosts a small signal (b) beeps for an alarm (c) is a resistance knob (d) lets current go one way
  35. 35.🧩 Which component blows if current is high? (a) resistor (b) potentiometer (c) fuse (d) buzzer
  36. 36.True or false: a transistor limits the current. (a) True (b) False
  37. 37.True or false: a buzzer turns a fan or wheels. (a) True (b) False
  38. 38.True or false: a motor makes a beeping sound. (a) True (b) False
  39. 39.🧩 Which component turns a fan or wheels? (a) motor (b) thermistor (c) capacitor (d) fuse
  40. 40.What does a motor do? (a) has coloured bands (b) smooths a wobbly supply (c) makes things spin (d) is a resistance knob

Answer key

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

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