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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 371 · 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 smooths a wobbly supply? (a) LED (b) capacitor (c) thermistor (d) transistor
  2. 2.What does a resistor do? (a) blows if current is high (b) glows using little power (c) is a resistance knob (d) has coloured bands
  3. 3.🧩 Which component blows if current is high? (a) thermistor (b) resistor (c) diode (d) fuse
  4. 4.True or false: a thermistor senses how bright it is. (a) True (b) False
  5. 5.True or false: a fuse senses how bright it is. (a) True (b) False
  6. 6.What does a thermistor do? (a) senses how bright it is (b) stores a little charge (c) is a resistance knob (d) senses how hot it is
  7. 7.🧩 A capacitor in a circuit can … (a) measure heat (b) make light (c) spin a wheel (d) store charge briefly
  8. 8.True or false: a buzzer makes a beeping sound. (a) True (b) False
  9. 9.What does a capacitor do? (a) limits the current (b) smooths a wobbly supply (c) glows using little power (d) makes a beeping sound
  10. 10.🧩 Which component senses how bright it is? (a) buzzer (b) potentiometer (c) LDR (d) LED
  11. 11.🧩 Which part changes electrical energy into sound? (a) a diode (b) a resistor (c) a buzzer (d) a capacitor
  12. 12.What does an LDR do? (a) is a resistance knob (b) senses how bright it is (c) boosts a small signal (d) limits the current
  13. 13.🧩 Which component stores a little charge? (a) LDR (b) capacitor (c) thermistor (d) resistor
  14. 14.True or false: a thermistor beeps for an alarm. (a) False (b) True
  15. 15.🧩 Which component senses how hot it is? (a) LED (b) fuse (c) thermistor (d) transistor
  16. 16.True or false: a capacitor smooths a wobbly supply. (a) True (b) False
  17. 17.What does a buzzer do? (a) makes things spin (b) is a resistance knob (c) beeps for an alarm (d) glows using little power
  18. 18.What does a capacitor do? (a) lets current go one way (b) makes things spin (c) stores a little charge (d) glows using little power
  19. 19.What does a buzzer do? (a) is a resistance knob (b) makes things spin (c) senses how bright it is (d) makes a beeping sound
  20. 20.🧩 Which component turns a fan or wheels? (a) motor (b) buzzer (c) resistor (d) LED
  21. 21.🧩 Which part changes electrical energy into movement? (a) an LED (b) a fuse (c) a motor (d) a resistor
  22. 22.True or false: an LDR senses how bright it is. (a) False (b) True
  23. 23.True or false: a resistor is a resistance knob. (a) True (b) False
  24. 24.True or false: a potentiometer boosts a small signal. (a) False (b) True
  25. 25.True or false: a transistor lets current go one way. (a) False (b) True
  26. 26.What does a transistor do? (a) boosts a small signal (b) blows if current is high (c) is a resistance knob (d) senses how hot it is
  27. 27.🧩 Which component makes things spin? (a) thermistor (b) capacitor (c) buzzer (d) motor
  28. 28.True or false: a motor turns a fan or wheels. (a) True (b) False
  29. 29.True or false: a buzzer limits the current. (a) False (b) True
  30. 30.What does a motor do? (a) glows using little power (b) makes things spin (c) limits the current (d) smooths a wobbly supply
  31. 31.True or false: a transistor smooths a wobbly supply. (a) False (b) True
  32. 32.🧩 Which component has coloured bands? (a) LDR (b) thermistor (c) potentiometer (d) resistor
  33. 33.🧩 Which component lets current go one way? (a) resistor (b) buzzer (c) diode (d) LDR
  34. 34.🧩 Which component limits the current? (a) resistor (b) fuse (c) buzzer (d) potentiometer
  35. 35.True or false: an LED glows using little power. (a) False (b) True
  36. 36.True or false: a resistor has coloured bands. (a) False (b) True
  37. 37.🧩 Which component makes a beeping sound? (a) buzzer (b) fuse (c) resistor (d) LDR
  38. 38.True or false: a resistor senses how bright it is. (a) True (b) False
  39. 39.True or false: a motor makes things spin. (a) False (b) True
  40. 40.What does an LED do? (a) blows if current is high (b) turns a fan or wheels (c) glows using little power (d) boosts a small signal

Answer key

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

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