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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 541 · 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) spin a wheel (c) make light (d) measure heat
  2. 2.True or false: a diode stores a little charge. (a) True (b) False
  3. 3.🧩 Which part changes electrical energy into sound? (a) a buzzer (b) a diode (c) a capacitor (d) a resistor
  4. 4.🧩 Which component smooths a wobbly supply? (a) capacitor (b) LED (c) diode (d) resistor
  5. 5.🧩 Which component makes things spin? (a) resistor (b) capacitor (c) LED (d) motor
  6. 6.🧩 Which component stores a little charge? (a) motor (b) fuse (c) capacitor (d) diode
  7. 7.True or false: a buzzer lets current go one way. (a) True (b) False
  8. 8.🧩 Which component turns a fan or wheels? (a) thermistor (b) resistor (c) LED (d) motor
  9. 9.🧩 Which component has coloured bands? (a) fuse (b) LDR (c) resistor (d) buzzer
  10. 10.🧩 Which component beeps for an alarm? (a) buzzer (b) LED (c) diode (d) motor
  11. 11.🧩 Which component senses how hot it is? (a) thermistor (b) transistor (c) LDR (d) fuse
  12. 12.True or false: a potentiometer is a resistance knob. (a) True (b) False
  13. 13.True or false: an LED turns a fan or wheels. (a) False (b) True
  14. 14.True or false: a thermistor stores a little charge. (a) True (b) False
  15. 15.True or false: an LED glows using little power. (a) True (b) False
  16. 16.What does an LED do? (a) stores a little charge (b) smooths a wobbly supply (c) turns a fan or wheels (d) glows using little power
  17. 17.What does a diode do? (a) turns a fan or wheels (b) lets current go one way (c) limits the current (d) stores a little charge
  18. 18.🧩 Which part changes electrical energy into movement? (a) an LED (b) a motor (c) a resistor (d) a fuse
  19. 19.What does a resistor do? (a) boosts a small signal (b) lets current go one way (c) blows if current is high (d) limits the current
  20. 20.What does a transistor do? (a) senses how hot it is (b) smooths a wobbly supply (c) boosts a small signal (d) beeps for an alarm
  21. 21.True or false: a motor beeps for an alarm. (a) False (b) True
  22. 22.What does a motor do? (a) lets current go one way (b) blows if current is high (c) has coloured bands (d) makes things spin
  23. 23.🧩 Which component is a resistance knob? (a) potentiometer (b) fuse (c) LDR (d) LED
  24. 24.What does a buzzer do? (a) makes a beeping sound (b) senses how hot it is (c) has coloured bands (d) makes things spin
  25. 25.🧩 Which component limits the current? (a) potentiometer (b) LDR (c) thermistor (d) resistor
  26. 26.What does a capacitor do? (a) lets current go one way (b) stores a little charge (c) turns a fan or wheels (d) senses how bright it is
  27. 27.What does an LDR do? (a) is a resistance knob (b) makes things spin (c) beeps for an alarm (d) senses how bright it is
  28. 28.True or false: a thermistor senses how hot it is. (a) False (b) True
  29. 29.🧩 Which component lets current go one way? (a) LED (b) buzzer (c) LDR (d) diode
  30. 30.What does a buzzer do? (a) is a resistance knob (b) senses how hot it is (c) beeps for an alarm (d) smooths a wobbly supply
  31. 31.🧩 Which component makes a beeping sound? (a) fuse (b) buzzer (c) motor (d) capacitor
  32. 32.True or false: a diode beeps for an alarm. (a) False (b) True
  33. 33.What does a potentiometer do? (a) stores a little charge (b) is a resistance knob (c) makes things spin (d) senses how hot it is
  34. 34.True or false: a motor makes things spin. (a) True (b) False
  35. 35.What does a fuse do? (a) boosts a small signal (b) blows if current is high (c) senses how bright it is (d) smooths a wobbly supply
  36. 36.What does a motor do? (a) glows using little power (b) blows if current is high (c) limits the current (d) turns a fan or wheels
  37. 37.🧩 Which component boosts a small signal? (a) capacitor (b) fuse (c) transistor (d) LED
  38. 38.🧩 Which component senses how bright it is? (a) diode (b) motor (c) potentiometer (d) LDR
  39. 39.True or false: a motor is a resistance knob. (a) False (b) True
  40. 40.True or false: a resistor has coloured bands. (a) True (b) False

Answer key

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

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