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Electronics Worksheet: Electronic Components

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

Answer key

  1. resistor
  2. stores a little charge
  3. makes a beeping sound
  4. motor
  5. False
  6. a motor
  7. senses how bright it is
  8. True
  9. False
  10. makes things spin
  11. False
  12. boosts a small signal
  13. motor
  14. diode
  15. buzzer
  16. beeps for an alarm
  17. store charge briefly
  18. True
  19. False
  20. False
  21. thermistor
  22. False
  23. fuse
  24. False
  25. True
  26. True
  27. False
  28. True
  29. capacitor
  30. a buzzer
  31. limits the current
  32. True
  33. potentiometer
  34. False
  35. has coloured bands
  36. False
  37. resistor
  38. False
  39. turns a fan or wheels
  40. True

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