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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 548 · 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 fuse (d) a motor
  2. 2.🧩 Which component turns a fan or wheels? (a) resistor (b) fuse (c) transistor (d) motor
  3. 3.True or false: a transistor boosts a small signal. (a) False (b) True
  4. 4.True or false: an LDR has coloured bands. (a) False (b) True
  5. 5.🧩 Which component smooths a wobbly supply? (a) transistor (b) LED (c) buzzer (d) capacitor
  6. 6.🧩 Which component limits the current? (a) resistor (b) thermistor (c) motor (d) buzzer
  7. 7.What does a buzzer do? (a) has coloured bands (b) glows using little power (c) makes a beeping sound (d) smooths a wobbly supply
  8. 8.🧩 Which component senses how bright it is? (a) buzzer (b) fuse (c) capacitor (d) LDR
  9. 9.What does a potentiometer do? (a) glows using little power (b) makes a beeping sound (c) limits the current (d) is a resistance knob
  10. 10.🧩 Which component lets current go one way? (a) diode (b) capacitor (c) transistor (d) LED
  11. 11.True or false: a fuse makes things spin. (a) True (b) False
  12. 12.🧩 Which component stores a little charge? (a) motor (b) LDR (c) thermistor (d) capacitor
  13. 13.🧩 Which part changes electrical energy into sound? (a) a buzzer (b) a diode (c) a capacitor (d) a resistor
  14. 14.True or false: a buzzer makes a beeping sound. (a) False (b) True
  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 capacitor do? (a) beeps for an alarm (b) smooths a wobbly supply (c) senses how hot it is (d) makes things spin
  17. 17.True or false: an LDR limits the current. (a) True (b) False
  18. 18.What does an LDR do? (a) senses how bright it is (b) has coloured bands (c) limits the current (d) blows if current is high
  19. 19.🧩 Which component blows if current is high? (a) potentiometer (b) buzzer (c) transistor (d) fuse
  20. 20.What does a thermistor do? (a) glows using little power (b) has coloured bands (c) blows if current is high (d) senses how hot it is
  21. 21.True or false: an LDR senses how bright it is. (a) True (b) False
  22. 22.True or false: a fuse glows using little power. (a) True (b) False
  23. 23.🧩 Which component boosts a small signal? (a) LDR (b) resistor (c) transistor (d) thermistor
  24. 24.🧩 Which component makes things spin? (a) LDR (b) motor (c) LED (d) fuse
  25. 25.What does a motor do? (a) stores a little charge (b) senses how bright it is (c) makes things spin (d) has coloured bands
  26. 26.What does a transistor do? (a) boosts a small signal (b) glows using little power (c) lets current go one way (d) smooths a wobbly supply
  27. 27.True or false: a buzzer lets current go one way. (a) True (b) False
  28. 28.What does a diode do? (a) smooths a wobbly supply (b) stores a little charge (c) glows using little power (d) lets current go one way
  29. 29.True or false: a potentiometer smooths a wobbly supply. (a) False (b) True
  30. 30.What does a resistor do? (a) glows using little power (b) turns a fan or wheels (c) has coloured bands (d) stores a little charge
  31. 31.🧩 Which component beeps for an alarm? (a) buzzer (b) transistor (c) LED (d) LDR
  32. 32.What does a fuse do? (a) lets current go one way (b) is a resistance knob (c) makes a beeping sound (d) blows if current is high
  33. 33.True or false: a motor has coloured bands. (a) True (b) False
  34. 34.True or false: a resistor has coloured bands. (a) True (b) False
  35. 35.True or false: an LED is a resistance knob. (a) False (b) True
  36. 36.True or false: an LED has coloured bands. (a) False (b) True
  37. 37.True or false: a transistor blows if current is high. (a) True (b) False
  38. 38.True or false: a transistor senses how hot it is. (a) True (b) False
  39. 39.🧩 Which component glows using little power? (a) LDR (b) resistor (c) fuse (d) LED
  40. 40.🧩 Which component makes a beeping sound? (a) capacitor (b) buzzer (c) LED (d) diode

Answer key

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

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