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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 425 · 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) limits the current (b) boosts a small signal (c) turns a fan or wheels (d) glows using little power
  2. 2.What does a buzzer do? (a) stores a little charge (b) smooths a wobbly supply (c) makes a beeping sound (d) turns a fan or wheels
  3. 3.🧩 Which component stores a little charge? (a) transistor (b) buzzer (c) capacitor (d) motor
  4. 4.🧩 Which component boosts a small signal? (a) transistor (b) resistor (c) LED (d) potentiometer
  5. 5.What does a capacitor do? (a) beeps for an alarm (b) smooths a wobbly supply (c) blows if current is high (d) limits the current
  6. 6.🧩 A capacitor in a circuit can … (a) measure heat (b) store charge briefly (c) make light (d) spin a wheel
  7. 7.🧩 Which component glows using little power? (a) transistor (b) capacitor (c) motor (d) LED
  8. 8.🧩 Which component lets current go one way? (a) buzzer (b) capacitor (c) transistor (d) diode
  9. 9.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a diode (c) a capacitor (d) a buzzer
  10. 10.True or false: a motor makes things spin. (a) True (b) False
  11. 11.What does an LED do? (a) senses how hot it is (b) limits the current (c) is a resistance knob (d) glows using little power
  12. 12.🧩 Which part changes electrical energy into movement? (a) a fuse (b) an LED (c) a resistor (d) a motor
  13. 13.🧩 Which component smooths a wobbly supply? (a) LED (b) fuse (c) buzzer (d) capacitor
  14. 14.🧩 Which component senses how hot it is? (a) buzzer (b) diode (c) fuse (d) thermistor
  15. 15.🧩 Which component limits the current? (a) LED (b) capacitor (c) LDR (d) resistor
  16. 16.True or false: an LED glows using little power. (a) False (b) True
  17. 17.What does a fuse do? (a) limits the current (b) senses how bright it is (c) blows if current is high (d) turns a fan or wheels
  18. 18.What does a diode do? (a) has coloured bands (b) glows using little power (c) smooths a wobbly supply (d) lets current go one way
  19. 19.True or false: a buzzer lets current go one way. (a) False (b) True
  20. 20.What does a thermistor do? (a) makes a beeping sound (b) stores a little charge (c) senses how hot it is (d) smooths a wobbly supply
  21. 21.True or false: a transistor makes a beeping sound. (a) True (b) False
  22. 22.True or false: a capacitor smooths a wobbly supply. (a) True (b) False
  23. 23.🧩 Which component makes a beeping sound? (a) transistor (b) thermistor (c) buzzer (d) LDR
  24. 24.True or false: a diode lets current go one way. (a) False (b) True
  25. 25.What does a resistor do? (a) senses how hot it is (b) beeps for an alarm (c) has coloured bands (d) is a resistance knob
  26. 26.What does a transistor do? (a) stores a little charge (b) has coloured bands (c) blows if current is high (d) boosts a small signal
  27. 27.True or false: a resistor limits the current. (a) True (b) False
  28. 28.🧩 Which component makes things spin? (a) motor (b) capacitor (c) diode (d) transistor
  29. 29.What does a capacitor do? (a) limits the current (b) stores a little charge (c) senses how bright it is (d) lets current go one way
  30. 30.🧩 Which component turns a fan or wheels? (a) resistor (b) motor (c) thermistor (d) potentiometer
  31. 31.🧩 Which component is a resistance knob? (a) diode (b) capacitor (c) thermistor (d) potentiometer
  32. 32.🧩 Which component beeps for an alarm? (a) capacitor (b) transistor (c) LDR (d) buzzer
  33. 33.What does a motor do? (a) senses how hot it is (b) glows using little power (c) has coloured bands (d) turns a fan or wheels
  34. 34.True or false: an LDR senses how bright it is. (a) True (b) False
  35. 35.🧩 Which component has coloured bands? (a) fuse (b) thermistor (c) resistor (d) motor
  36. 36.True or false: a transistor stores a little charge. (a) False (b) True
  37. 37.True or false: a potentiometer makes things spin. (a) True (b) False
  38. 38.True or false: a diode senses how hot it is. (a) False (b) True
  39. 39.True or false: a thermistor senses how hot it is. (a) True (b) False
  40. 40.True or false: a potentiometer smooths a wobbly supply. (a) False (b) True

Answer key

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

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