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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 512 · 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 movement? (a) a resistor (b) an LED (c) a motor (d) a fuse
  2. 2.🧩 Which component limits the current? (a) resistor (b) potentiometer (c) LED (d) fuse
  3. 3.What does a resistor do? (a) senses how hot it is (b) blows if current is high (c) boosts a small signal (d) has coloured bands
  4. 4.True or false: a buzzer makes a beeping sound. (a) True (b) False
  5. 5.🧩 Which component smooths a wobbly supply? (a) capacitor (b) resistor (c) diode (d) buzzer
  6. 6.🧩 Which part changes electrical energy into sound? (a) a buzzer (b) a capacitor (c) a diode (d) a resistor
  7. 7.True or false: an LDR makes a beeping sound. (a) True (b) False
  8. 8.🧩 A capacitor in a circuit can … (a) store charge briefly (b) make light (c) measure heat (d) spin a wheel
  9. 9.What does a thermistor do? (a) turns a fan or wheels (b) stores a little charge (c) beeps for an alarm (d) senses how hot it is
  10. 10.True or false: an LDR stores a little charge. (a) True (b) False
  11. 11.What does a capacitor do? (a) limits the current (b) stores a little charge (c) has coloured bands (d) lets current go one way
  12. 12.What does a fuse do? (a) has coloured bands (b) lets current go one way (c) stores a little charge (d) blows if current is high
  13. 13.What does a capacitor do? (a) beeps for an alarm (b) limits the current (c) lets current go one way (d) smooths a wobbly supply
  14. 14.🧩 Which component lets current go one way? (a) resistor (b) diode (c) buzzer (d) thermistor
  15. 15.🧩 Which component blows if current is high? (a) fuse (b) potentiometer (c) LDR (d) buzzer
  16. 16.🧩 Which component glows using little power? (a) thermistor (b) fuse (c) transistor (d) LED
  17. 17.🧩 Which component senses how bright it is? (a) thermistor (b) capacitor (c) LDR (d) fuse
  18. 18.What does a potentiometer do? (a) senses how bright it is (b) makes things spin (c) smooths a wobbly supply (d) is a resistance knob
  19. 19.True or false: an LDR senses how bright it is. (a) False (b) True
  20. 20.True or false: a resistor is a resistance knob. (a) False (b) True
  21. 21.🧩 Which component stores a little charge? (a) capacitor (b) transistor (c) LED (d) potentiometer
  22. 22.What does a buzzer do? (a) makes things spin (b) makes a beeping sound (c) turns a fan or wheels (d) stores a little charge
  23. 23.🧩 Which component turns a fan or wheels? (a) potentiometer (b) motor (c) transistor (d) LED
  24. 24.🧩 Which component beeps for an alarm? (a) buzzer (b) motor (c) resistor (d) transistor
  25. 25.🧩 Which component senses how hot it is? (a) diode (b) buzzer (c) thermistor (d) motor
  26. 26.True or false: a resistor limits the current. (a) True (b) False
  27. 27.What does a transistor do? (a) boosts a small signal (b) turns a fan or wheels (c) makes a beeping sound (d) limits the current
  28. 28.What does a diode do? (a) beeps for an alarm (b) senses how bright it is (c) lets current go one way (d) turns a fan or wheels
  29. 29.True or false: a potentiometer is a resistance knob. (a) False (b) True
  30. 30.🧩 Which component has coloured bands? (a) potentiometer (b) LED (c) transistor (d) resistor
  31. 31.True or false: a motor beeps for an alarm. (a) True (b) False
  32. 32.True or false: a motor turns a fan or wheels. (a) False (b) True
  33. 33.True or false: a buzzer boosts a small signal. (a) False (b) True
  34. 34.True or false: a resistor smooths a wobbly supply. (a) True (b) False
  35. 35.True or false: a fuse makes things spin. (a) True (b) False
  36. 36.True or false: a resistor has coloured bands. (a) True (b) False
  37. 37.True or false: a capacitor makes a beeping sound. (a) False (b) True
  38. 38.🧩 Which component makes things spin? (a) LED (b) capacitor (c) thermistor (d) motor
  39. 39.🧩 Which component is a resistance knob? (a) potentiometer (b) diode (c) LDR (d) transistor
  40. 40.True or false: a diode lets current go one way. (a) False (b) True

Answer key

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

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