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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 684 · 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) LDR (b) potentiometer (c) buzzer (d) transistor
  2. 2.True or false: a fuse blows if current is high. (a) False (b) True
  3. 3.🧩 Which part changes electrical energy into sound? (a) a diode (b) a resistor (c) a capacitor (d) a buzzer
  4. 4.🧩 Which component glows using little power? (a) thermistor (b) capacitor (c) LED (d) fuse
  5. 5.What does a resistor do? (a) lets current go one way (b) stores a little charge (c) glows using little power (d) limits the current
  6. 6.🧩 Which part changes electrical energy into movement? (a) a resistor (b) an LED (c) a fuse (d) a motor
  7. 7.What does a buzzer do? (a) beeps for an alarm (b) blows if current is high (c) smooths a wobbly supply (d) glows using little power
  8. 8.🧩 Which component makes a beeping sound? (a) fuse (b) motor (c) capacitor (d) buzzer
  9. 9.True or false: a diode lets current go one way. (a) True (b) False
  10. 10.True or false: a diode is a resistance knob. (a) True (b) False
  11. 11.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
  12. 12.🧩 A capacitor in a circuit can … (a) measure heat (b) store charge briefly (c) make light (d) spin a wheel
  13. 13.True or false: a buzzer beeps for an alarm. (a) False (b) True
  14. 14.What does a buzzer do? (a) glows using little power (b) boosts a small signal (c) lets current go one way (d) makes a beeping sound
  15. 15.🧩 Which component smooths a wobbly supply? (a) LED (b) transistor (c) buzzer (d) capacitor
  16. 16.🧩 Which component beeps for an alarm? (a) resistor (b) buzzer (c) LED (d) diode
  17. 17.What does an LED do? (a) has coloured bands (b) stores a little charge (c) blows if current is high (d) glows using little power
  18. 18.🧩 Which component stores a little charge? (a) potentiometer (b) capacitor (c) buzzer (d) motor
  19. 19.🧩 Which component has coloured bands? (a) potentiometer (b) transistor (c) resistor (d) capacitor
  20. 20.🧩 Which component blows if current is high? (a) motor (b) LDR (c) fuse (d) resistor
  21. 21.🧩 Which component limits the current? (a) diode (b) resistor (c) motor (d) LDR
  22. 22.What does a thermistor do? (a) limits the current (b) senses how hot it is (c) stores a little charge (d) makes things spin
  23. 23.True or false: a potentiometer makes things spin. (a) True (b) False
  24. 24.🧩 Which component turns a fan or wheels? (a) fuse (b) resistor (c) motor (d) LED
  25. 25.True or false: a thermistor senses how bright it is. (a) False (b) True
  26. 26.What does a diode do? (a) limits the current (b) senses how bright it is (c) stores a little charge (d) lets current go one way
  27. 27.🧩 Which component boosts a small signal? (a) transistor (b) potentiometer (c) thermistor (d) LDR
  28. 28.True or false: a motor turns a fan or wheels. (a) True (b) False
  29. 29.True or false: a resistor has coloured bands. (a) False (b) True
  30. 30.What does a capacitor do? (a) has coloured bands (b) lets current go one way (c) stores a little charge (d) senses how bright it is
  31. 31.True or false: a fuse senses how bright it is. (a) True (b) False
  32. 32.What does a transistor do? (a) limits the current (b) boosts a small signal (c) is a resistance knob (d) smooths a wobbly supply
  33. 33.True or false: a thermistor senses how hot it is. (a) True (b) False
  34. 34.What does an LDR do? (a) lets current go one way (b) senses how hot it is (c) turns a fan or wheels (d) senses how bright it is
  35. 35.True or false: a capacitor makes things spin. (a) True (b) False
  36. 36.🧩 Which component makes things spin? (a) LED (b) fuse (c) capacitor (d) motor
  37. 37.True or false: a fuse senses how hot it is. (a) True (b) False
  38. 38.True or false: a capacitor limits the current. (a) True (b) False
  39. 39.True or false: a resistor senses how hot it is. (a) True (b) False
  40. 40.🧩 Which component lets current go one way? (a) fuse (b) resistor (c) diode (d) potentiometer

Answer key

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

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