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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 481 · 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.What does a resistor do? (a) makes things spin (b) makes a beeping sound (c) has coloured bands (d) beeps for an alarm
  2. 2.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a buzzer (c) a resistor (d) a diode
  3. 3.What does a motor do? (a) limits the current (b) beeps for an alarm (c) makes things spin (d) glows using little power
  4. 4.🧩 Which component beeps for an alarm? (a) motor (b) LDR (c) resistor (d) buzzer
  5. 5.🧩 Which component makes a beeping sound? (a) transistor (b) resistor (c) buzzer (d) potentiometer
  6. 6.🧩 Which component boosts a small signal? (a) diode (b) motor (c) transistor (d) potentiometer
  7. 7.🧩 A capacitor in a circuit can … (a) make light (b) spin a wheel (c) measure heat (d) store charge briefly
  8. 8.What does a potentiometer do? (a) senses how bright it is (b) is a resistance knob (c) has coloured bands (d) smooths a wobbly supply
  9. 9.🧩 Which part changes electrical energy into movement? (a) an LED (b) a resistor (c) a motor (d) a fuse
  10. 10.🧩 Which component has coloured bands? (a) potentiometer (b) thermistor (c) fuse (d) resistor
  11. 11.True or false: a buzzer beeps for an alarm. (a) False (b) True
  12. 12.What does a buzzer do? (a) makes a beeping sound (b) senses how hot it is (c) lets current go one way (d) turns a fan or wheels
  13. 13.True or false: an LED stores a little charge. (a) True (b) False
  14. 14.True or false: a capacitor stores a little charge. (a) True (b) False
  15. 15.True or false: a resistor has coloured bands. (a) False (b) True
  16. 16.True or false: a transistor lets current go one way. (a) True (b) False
  17. 17.🧩 Which component glows using little power? (a) fuse (b) diode (c) motor (d) LED
  18. 18.What does a fuse do? (a) senses how hot it is (b) stores a little charge (c) is a resistance knob (d) blows if current is high
  19. 19.True or false: a fuse senses how bright it is. (a) False (b) True
  20. 20.True or false: a fuse glows using little power. (a) False (b) True
  21. 21.🧩 Which component is a resistance knob? (a) buzzer (b) transistor (c) potentiometer (d) capacitor
  22. 22.What does a capacitor do? (a) smooths a wobbly supply (b) lets current go one way (c) has coloured bands (d) turns a fan or wheels
  23. 23.True or false: an LDR limits the current. (a) False (b) True
  24. 24.What does a thermistor do? (a) senses how hot it is (b) limits the current (c) is a resistance knob (d) blows if current is high
  25. 25.🧩 Which component lets current go one way? (a) thermistor (b) diode (c) motor (d) fuse
  26. 26.True or false: a motor turns a fan or wheels. (a) False (b) True
  27. 27.True or false: an LED glows using little power. (a) False (b) True
  28. 28.What does a transistor do? (a) smooths a wobbly supply (b) boosts a small signal (c) makes a beeping sound (d) lets current go one way
  29. 29.True or false: an LDR makes a beeping sound. (a) True (b) False
  30. 30.What does a capacitor do? (a) is a resistance knob (b) glows using little power (c) limits the current (d) stores a little charge
  31. 31.True or false: a thermistor stores a little charge. (a) True (b) False
  32. 32.🧩 Which component makes things spin? (a) LED (b) buzzer (c) capacitor (d) motor
  33. 33.🧩 Which component limits the current? (a) buzzer (b) resistor (c) motor (d) capacitor
  34. 34.🧩 Which component turns a fan or wheels? (a) potentiometer (b) buzzer (c) motor (d) transistor
  35. 35.True or false: a motor lets current go one way. (a) True (b) False
  36. 36.What does a diode do? (a) has coloured bands (b) limits the current (c) turns a fan or wheels (d) lets current go one way
  37. 37.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
  38. 38.True or false: a buzzer makes a beeping sound. (a) False (b) True
  39. 39.True or false: a fuse limits the current. (a) True (b) False
  40. 40.True or false: a fuse blows if current is high. (a) False (b) True

Answer key

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

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