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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 411 · 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.What does a capacitor do? (a) makes a beeping sound (b) limits the current (c) smooths a wobbly supply (d) blows if current is high
  2. 2.What does a thermistor do? (a) smooths a wobbly supply (b) makes a beeping sound (c) blows if current is high (d) senses how hot it is
  3. 3.🧩 Which component makes a beeping sound? (a) LED (b) buzzer (c) resistor (d) capacitor
  4. 4.What does a fuse do? (a) turns a fan or wheels (b) limits the current (c) blows if current is high (d) glows using little power
  5. 5.What does a resistor do? (a) beeps for an alarm (b) has coloured bands (c) smooths a wobbly supply (d) is a resistance knob
  6. 6.True or false: a transistor boosts a small signal. (a) True (b) False
  7. 7.🧩 Which component has coloured bands? (a) LDR (b) buzzer (c) resistor (d) thermistor
  8. 8.True or false: a potentiometer limits the current. (a) True (b) False
  9. 9.What does a resistor do? (a) makes things spin (b) stores a little charge (c) blows if current is high (d) limits the current
  10. 10.What does an LDR do? (a) has coloured bands (b) is a resistance knob (c) makes a beeping sound (d) senses how bright it is
  11. 11.🧩 Which component beeps for an alarm? (a) fuse (b) buzzer (c) LDR (d) motor
  12. 12.🧩 Which component smooths a wobbly supply? (a) transistor (b) potentiometer (c) buzzer (d) capacitor
  13. 13.True or false: an LED glows using little power. (a) True (b) False
  14. 14.True or false: a capacitor stores a little charge. (a) False (b) True
  15. 15.🧩 Which component stores a little charge? (a) buzzer (b) capacitor (c) motor (d) resistor
  16. 16.🧩 Which part changes electrical energy into movement? (a) a fuse (b) an LED (c) a motor (d) a resistor
  17. 17.🧩 A capacitor in a circuit can … (a) make light (b) store charge briefly (c) spin a wheel (d) measure heat
  18. 18.True or false: an LED senses how hot it is. (a) True (b) False
  19. 19.🧩 Which component limits the current? (a) buzzer (b) motor (c) resistor (d) thermistor
  20. 20.🧩 Which component turns a fan or wheels? (a) fuse (b) transistor (c) LED (d) motor
  21. 21.True or false: a motor turns a fan or wheels. (a) False (b) True
  22. 22.True or false: a buzzer makes a beeping sound. (a) True (b) False
  23. 23.What does a capacitor do? (a) has coloured bands (b) stores a little charge (c) blows if current is high (d) senses how hot it is
  24. 24.What does a buzzer do? (a) turns a fan or wheels (b) makes a beeping sound (c) limits the current (d) stores a little charge
  25. 25.🧩 Which component senses how bright it is? (a) fuse (b) LED (c) transistor (d) LDR
  26. 26.What does a diode do? (a) lets current go one way (b) glows using little power (c) turns a fan or wheels (d) smooths a wobbly supply
  27. 27.True or false: a capacitor makes things spin. (a) True (b) False
  28. 28.🧩 Which part changes electrical energy into sound? (a) a diode (b) a buzzer (c) a resistor (d) a capacitor
  29. 29.🧩 Which component senses how hot it is? (a) capacitor (b) LED (c) fuse (d) thermistor
  30. 30.What does a transistor do? (a) smooths a wobbly supply (b) makes a beeping sound (c) has coloured bands (d) boosts a small signal
  31. 31.True or false: a resistor has coloured bands. (a) False (b) True
  32. 32.True or false: a fuse limits the current. (a) False (b) True
  33. 33.True or false: a resistor glows using little power. (a) False (b) True
  34. 34.True or false: a potentiometer is a resistance knob. (a) False (b) True
  35. 35.🧩 Which component glows using little power? (a) buzzer (b) motor (c) fuse (d) LED
  36. 36.True or false: a buzzer is a resistance knob. (a) False (b) True
  37. 37.What does an LED do? (a) makes a beeping sound (b) has coloured bands (c) smooths a wobbly supply (d) glows using little power
  38. 38.🧩 Which component blows if current is high? (a) LED (b) potentiometer (c) LDR (d) fuse
  39. 39.True or false: a resistor limits the current. (a) True (b) False
  40. 40.What does a motor do? (a) smooths a wobbly supply (b) boosts a small signal (c) turns a fan or wheels (d) blows if current is high

Answer key

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

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