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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 172 · 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.🧩 A capacitor in a circuit can … (a) store charge briefly (b) measure heat (c) spin a wheel (d) make light
  2. 2.What does a buzzer do? (a) boosts a small signal (b) smooths a wobbly supply (c) lets current go one way (d) beeps for an alarm
  3. 3.🧩 Which component glows using little power? (a) transistor (b) buzzer (c) LED (d) diode
  4. 4.True or false: a buzzer makes a beeping sound. (a) False (b) True
  5. 5.🧩 Which component smooths a wobbly supply? (a) LDR (b) diode (c) capacitor (d) thermistor
  6. 6.🧩 Which component makes a beeping sound? (a) diode (b) resistor (c) thermistor (d) buzzer
  7. 7.🧩 Which component blows if current is high? (a) fuse (b) potentiometer (c) buzzer (d) resistor
  8. 8.What does a diode do? (a) senses how hot it is (b) turns a fan or wheels (c) lets current go one way (d) stores a little charge
  9. 9.What does a resistor do? (a) lets current go one way (b) makes a beeping sound (c) limits the current (d) stores a little charge
  10. 10.What does a buzzer do? (a) makes a beeping sound (b) has coloured bands (c) glows using little power (d) lets current go one way
  11. 11.🧩 Which part changes electrical energy into movement? (a) an LED (b) a fuse (c) a motor (d) a resistor
  12. 12.What does a motor do? (a) has coloured bands (b) stores a little charge (c) makes things spin (d) is a resistance knob
  13. 13.🧩 Which component beeps for an alarm? (a) LED (b) resistor (c) transistor (d) buzzer
  14. 14.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a buzzer (c) a resistor (d) a diode
  15. 15.True or false: an LDR senses how bright it is. (a) False (b) True
  16. 16.What does a thermistor do? (a) makes things spin (b) boosts a small signal (c) senses how hot it is (d) smooths a wobbly supply
  17. 17.True or false: a thermistor makes things spin. (a) False (b) True
  18. 18.True or false: a transistor stores a little charge. (a) False (b) True
  19. 19.🧩 Which component turns a fan or wheels? (a) diode (b) motor (c) transistor (d) fuse
  20. 20.🧩 Which component makes things spin? (a) fuse (b) potentiometer (c) resistor (d) motor
  21. 21.🧩 Which component limits the current? (a) potentiometer (b) LED (c) buzzer (d) resistor
  22. 22.🧩 Which component senses how hot it is? (a) transistor (b) potentiometer (c) LDR (d) thermistor
  23. 23.True or false: a motor makes things spin. (a) True (b) False
  24. 24.What does an LDR do? (a) senses how bright it is (b) is a resistance knob (c) makes things spin (d) stores a little charge
  25. 25.True or false: a thermistor lets current go one way. (a) False (b) True
  26. 26.🧩 Which component stores a little charge? (a) buzzer (b) thermistor (c) capacitor (d) LED
  27. 27.🧩 Which component is a resistance knob? (a) LED (b) fuse (c) LDR (d) potentiometer
  28. 28.🧩 Which component has coloured bands? (a) resistor (b) buzzer (c) LED (d) potentiometer
  29. 29.🧩 Which component senses how bright it is? (a) diode (b) transistor (c) LDR (d) thermistor
  30. 30.🧩 Which component lets current go one way? (a) potentiometer (b) diode (c) buzzer (d) LED
  31. 31.True or false: a fuse blows if current is high. (a) False (b) True
  32. 32.True or false: an LED has coloured bands. (a) True (b) False
  33. 33.True or false: a resistor senses how bright it is. (a) True (b) False
  34. 34.True or false: an LED turns a fan or wheels. (a) False (b) True
  35. 35.What does a motor do? (a) is a resistance knob (b) lets current go one way (c) turns a fan or wheels (d) has coloured bands
  36. 36.True or false: a capacitor is a resistance knob. (a) False (b) True
  37. 37.What does an LED do? (a) senses how bright it is (b) has coloured bands (c) boosts a small signal (d) glows using little power
  38. 38.True or false: a diode lets current go one way. (a) False (b) True
  39. 39.True or false: a buzzer beeps for an alarm. (a) True (b) False
  40. 40.True or false: a motor smooths a wobbly supply. (a) True (b) False

Answer key

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

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