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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 690 · 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 part changes electrical energy into sound? (a) a buzzer (b) a diode (c) a capacitor (d) a resistor
  2. 2.True or false: a buzzer senses how bright it is. (a) False (b) True
  3. 3.True or false: a motor turns a fan or wheels. (a) False (b) True
  4. 4.🧩 Which component stores a little charge? (a) thermistor (b) capacitor (c) motor (d) LDR
  5. 5.What does a buzzer do? (a) makes things spin (b) is a resistance knob (c) beeps for an alarm (d) has coloured bands
  6. 6.What does a buzzer do? (a) makes things spin (b) blows if current is high (c) makes a beeping sound (d) glows using little power
  7. 7.What does an LED do? (a) boosts a small signal (b) limits the current (c) senses how bright it is (d) glows using little power
  8. 8.🧩 Which component makes things spin? (a) potentiometer (b) LDR (c) capacitor (d) motor
  9. 9.True or false: a thermistor limits the current. (a) True (b) False
  10. 10.🧩 Which component limits the current? (a) motor (b) resistor (c) thermistor (d) potentiometer
  11. 11.True or false: a buzzer beeps for an alarm. (a) True (b) False
  12. 12.True or false: a resistor has coloured bands. (a) True (b) False
  13. 13.🧩 Which part changes electrical energy into movement? (a) a resistor (b) a fuse (c) a motor (d) an LED
  14. 14.🧩 Which component smooths a wobbly supply? (a) transistor (b) resistor (c) LED (d) capacitor
  15. 15.🧩 A capacitor in a circuit can … (a) make light (b) store charge briefly (c) spin a wheel (d) measure heat
  16. 16.What does a potentiometer do? (a) boosts a small signal (b) is a resistance knob (c) stores a little charge (d) limits the current
  17. 17.What does a resistor do? (a) is a resistance knob (b) turns a fan or wheels (c) boosts a small signal (d) has coloured bands
  18. 18.True or false: a diode turns a fan or wheels. (a) True (b) False
  19. 19.What does a thermistor do? (a) makes things spin (b) senses how bright it is (c) senses how hot it is (d) has coloured bands
  20. 20.🧩 Which component senses how bright it is? (a) capacitor (b) diode (c) potentiometer (d) LDR
  21. 21.🧩 Which component blows if current is high? (a) capacitor (b) thermistor (c) fuse (d) transistor
  22. 22.True or false: a fuse boosts a small signal. (a) True (b) False
  23. 23.🧩 Which component has coloured bands? (a) diode (b) motor (c) potentiometer (d) resistor
  24. 24.What does a capacitor do? (a) blows if current is high (b) boosts a small signal (c) stores a little charge (d) limits the current
  25. 25.What does a transistor do? (a) lets current go one way (b) boosts a small signal (c) turns a fan or wheels (d) limits the current
  26. 26.🧩 Which component glows using little power? (a) resistor (b) transistor (c) LED (d) capacitor
  27. 27.🧩 Which component beeps for an alarm? (a) buzzer (b) thermistor (c) LDR (d) LED
  28. 28.True or false: an LDR senses how bright it is. (a) True (b) False
  29. 29.True or false: a transistor senses how bright it is. (a) True (b) False
  30. 30.What does a motor do? (a) senses how bright it is (b) is a resistance knob (c) smooths a wobbly supply (d) makes things spin
  31. 31.What does an LDR do? (a) senses how hot it is (b) senses how bright it is (c) makes a beeping sound (d) glows using little power
  32. 32.True or false: a potentiometer smooths a wobbly supply. (a) True (b) False
  33. 33.True or false: a capacitor lets current go one way. (a) True (b) False
  34. 34.True or false: a potentiometer glows using little power. (a) True (b) False
  35. 35.🧩 Which component makes a beeping sound? (a) thermistor (b) resistor (c) buzzer (d) capacitor
  36. 36.True or false: a resistor limits the current. (a) True (b) False
  37. 37.What does a motor do? (a) turns a fan or wheels (b) boosts a small signal (c) makes a beeping sound (d) senses how hot it is
  38. 38.True or false: an LDR makes things spin. (a) True (b) False
  39. 39.🧩 Which component senses how hot it is? (a) thermistor (b) LDR (c) diode (d) motor
  40. 40.True or false: a motor makes things spin. (a) True (b) False

Answer key

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

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