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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 691 · 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 glows using little power? (a) potentiometer (b) buzzer (c) transistor (d) LED
  2. 2.True or false: a buzzer is a resistance knob. (a) False (b) True
  3. 3.🧩 A capacitor in a circuit can … (a) store charge briefly (b) make light (c) measure heat (d) spin a wheel
  4. 4.🧩 Which part changes electrical energy into sound? (a) a buzzer (b) a capacitor (c) a resistor (d) a diode
  5. 5.🧩 Which component is a resistance knob? (a) transistor (b) potentiometer (c) LED (d) thermistor
  6. 6.What does an LDR do? (a) boosts a small signal (b) glows using little power (c) lets current go one way (d) senses how bright it is
  7. 7.True or false: a fuse smooths a wobbly supply. (a) False (b) True
  8. 8.True or false: an LDR senses how bright it is. (a) False (b) True
  9. 9.True or false: a buzzer senses how bright it is. (a) False (b) True
  10. 10.🧩 Which component makes a beeping sound? (a) thermistor (b) capacitor (c) buzzer (d) transistor
  11. 11.What does a resistor do? (a) stores a little charge (b) boosts a small signal (c) limits the current (d) senses how bright it is
  12. 12.🧩 Which component beeps for an alarm? (a) motor (b) buzzer (c) potentiometer (d) transistor
  13. 13.True or false: an LED has coloured bands. (a) True (b) False
  14. 14.🧩 Which component senses how bright it is? (a) transistor (b) motor (c) thermistor (d) LDR
  15. 15.🧩 Which component limits the current? (a) resistor (b) LED (c) thermistor (d) diode
  16. 16.True or false: a diode limits the current. (a) False (b) True
  17. 17.🧩 Which component has coloured bands? (a) capacitor (b) resistor (c) LED (d) buzzer
  18. 18.What does a motor do? (a) makes a beeping sound (b) limits the current (c) turns a fan or wheels (d) senses how hot it is
  19. 19.What does an LED do? (a) makes a beeping sound (b) glows using little power (c) has coloured bands (d) limits the current
  20. 20.True or false: an LED lets current go one way. (a) True (b) False
  21. 21.True or false: a thermistor has coloured bands. (a) True (b) False
  22. 22.🧩 Which part changes electrical energy into movement? (a) a fuse (b) a motor (c) an LED (d) a resistor
  23. 23.True or false: a capacitor boosts a small signal. (a) True (b) False
  24. 24.True or false: a potentiometer is a resistance knob. (a) True (b) False
  25. 25.What does a diode do? (a) is a resistance knob (b) senses how hot it is (c) limits the current (d) lets current go one way
  26. 26.True or false: a capacitor makes things spin. (a) True (b) False
  27. 27.🧩 Which component stores a little charge? (a) motor (b) transistor (c) resistor (d) capacitor
  28. 28.What does a transistor do? (a) senses how bright it is (b) boosts a small signal (c) smooths a wobbly supply (d) stores a little charge
  29. 29.True or false: a buzzer glows using little power. (a) False (b) True
  30. 30.True or false: a capacitor lets current go one way. (a) False (b) True
  31. 31.True or false: a capacitor smooths a wobbly supply. (a) True (b) False
  32. 32.True or false: a motor makes things spin. (a) False (b) True
  33. 33.What does a motor do? (a) senses how bright it is (b) makes things spin (c) stores a little charge (d) has coloured bands
  34. 34.True or false: a motor stores a little charge. (a) True (b) False
  35. 35.True or false: a resistor smooths a wobbly supply. (a) False (b) True
  36. 36.🧩 Which component blows if current is high? (a) fuse (b) resistor (c) buzzer (d) capacitor
  37. 37.True or false: a motor turns a fan or wheels. (a) False (b) True
  38. 38.True or false: a buzzer beeps for an alarm. (a) False (b) True
  39. 39.🧩 Which component makes things spin? (a) LDR (b) fuse (c) LED (d) motor
  40. 40.True or false: a potentiometer beeps for an alarm. (a) True (b) False

Answer key

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

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