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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 160 · 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 makes a beeping sound? (a) potentiometer (b) LED (c) buzzer (d) capacitor
  2. 2.True or false: a transistor boosts a small signal. (a) False (b) True
  3. 3.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a capacitor (c) a diode (d) a buzzer
  4. 4.True or false: a fuse blows if current is high. (a) False (b) True
  5. 5.🧩 A capacitor in a circuit can … (a) measure heat (b) spin a wheel (c) store charge briefly (d) make light
  6. 6.True or false: a thermistor senses how hot it is. (a) True (b) False
  7. 7.🧩 Which component senses how hot it is? (a) thermistor (b) capacitor (c) fuse (d) potentiometer
  8. 8.🧩 Which component has coloured bands? (a) buzzer (b) motor (c) LED (d) resistor
  9. 9.What does a resistor do? (a) senses how hot it is (b) blows if current is high (c) makes a beeping sound (d) limits the current
  10. 10.True or false: a buzzer beeps for an alarm. (a) False (b) True
  11. 11.True or false: a motor stores a little charge. (a) True (b) False
  12. 12.True or false: a motor blows if current is high. (a) False (b) True
  13. 13.🧩 Which component glows using little power? (a) LDR (b) potentiometer (c) transistor (d) LED
  14. 14.What does a buzzer do? (a) limits the current (b) beeps for an alarm (c) senses how hot it is (d) blows if current is high
  15. 15.What does a potentiometer do? (a) smooths a wobbly supply (b) is a resistance knob (c) has coloured bands (d) senses how bright it is
  16. 16.What does a fuse do? (a) smooths a wobbly supply (b) blows if current is high (c) beeps for an alarm (d) makes a beeping sound
  17. 17.True or false: an LDR lets current go one way. (a) False (b) True
  18. 18.True or false: a diode limits the current. (a) True (b) False
  19. 19.True or false: an LED glows using little power. (a) True (b) False
  20. 20.🧩 Which component beeps for an alarm? (a) LDR (b) buzzer (c) transistor (d) capacitor
  21. 21.True or false: a capacitor glows using little power. (a) True (b) False
  22. 22.🧩 Which part changes electrical energy into movement? (a) a fuse (b) an LED (c) a motor (d) a resistor
  23. 23.True or false: a resistor has coloured bands. (a) True (b) False
  24. 24.What does a capacitor do? (a) senses how hot it is (b) smooths a wobbly supply (c) boosts a small signal (d) lets current go one way
  25. 25.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
  26. 26.🧩 Which component is a resistance knob? (a) motor (b) transistor (c) resistor (d) potentiometer
  27. 27.What does a capacitor do? (a) glows using little power (b) lets current go one way (c) blows if current is high (d) stores a little charge
  28. 28.🧩 Which component turns a fan or wheels? (a) buzzer (b) potentiometer (c) motor (d) diode
  29. 29.🧩 Which component blows if current is high? (a) potentiometer (b) transistor (c) thermistor (d) fuse
  30. 30.What does an LED do? (a) glows using little power (b) smooths a wobbly supply (c) beeps for an alarm (d) stores a little charge
  31. 31.True or false: an LED has coloured bands. (a) True (b) False
  32. 32.True or false: a motor lets current go one way. (a) False (b) True
  33. 33.True or false: a motor turns a fan or wheels. (a) True (b) False
  34. 34.True or false: a motor makes things spin. (a) False (b) True
  35. 35.True or false: an LDR limits the current. (a) False (b) True
  36. 36.True or false: a resistor limits the current. (a) False (b) True
  37. 37.What does a motor do? (a) has coloured bands (b) stores a little charge (c) makes things spin (d) limits the current
  38. 38.🧩 Which component makes things spin? (a) capacitor (b) potentiometer (c) motor (d) buzzer
  39. 39.True or false: a motor is a resistance knob. (a) True (b) False
  40. 40.What does an LDR do? (a) has coloured bands (b) turns a fan or wheels (c) lets current go one way (d) senses how bright it is

Answer key

  1. buzzer
  2. True
  3. a buzzer
  4. True
  5. store charge briefly
  6. True
  7. thermistor
  8. resistor
  9. limits the current
  10. True
  11. False
  12. False
  13. LED
  14. beeps for an alarm
  15. is a resistance knob
  16. blows if current is high
  17. False
  18. False
  19. True
  20. buzzer
  21. False
  22. a motor
  23. True
  24. smooths a wobbly supply
  25. True
  26. potentiometer
  27. stores a little charge
  28. motor
  29. fuse
  30. glows using little power
  31. False
  32. False
  33. True
  34. True
  35. False
  36. True
  37. makes things spin
  38. motor
  39. False
  40. senses how bright it is

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