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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 634 · 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 transistor do? (a) is a resistance knob (b) boosts a small signal (c) glows using little power (d) stores a little charge
  2. 2.What does an LDR do? (a) is a resistance knob (b) senses how bright it is (c) blows if current is high (d) stores a little charge
  3. 3.🧩 Which component senses how bright it is? (a) diode (b) capacitor (c) LDR (d) motor
  4. 4.🧩 Which component turns a fan or wheels? (a) thermistor (b) motor (c) diode (d) fuse
  5. 5.🧩 Which component limits the current? (a) buzzer (b) motor (c) diode (d) resistor
  6. 6.True or false: a buzzer beeps for an alarm. (a) False (b) True
  7. 7.What does a fuse do? (a) blows if current is high (b) has coloured bands (c) beeps for an alarm (d) limits the current
  8. 8.🧩 Which component has coloured bands? (a) capacitor (b) LDR (c) transistor (d) resistor
  9. 9.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a diode (c) a resistor (d) a buzzer
  10. 10.True or false: a resistor glows using little power. (a) True (b) False
  11. 11.What does a thermistor do? (a) boosts a small signal (b) lets current go one way (c) turns a fan or wheels (d) senses how hot it is
  12. 12.True or false: a capacitor turns a fan or wheels. (a) True (b) False
  13. 13.What does a motor do? (a) blows if current is high (b) turns a fan or wheels (c) boosts a small signal (d) glows using little power
  14. 14.What does a diode do? (a) blows if current is high (b) makes things spin (c) lets current go one way (d) smooths a wobbly supply
  15. 15.What does a resistor do? (a) senses how bright it is (b) is a resistance knob (c) has coloured bands (d) lets current go one way
  16. 16.🧩 A capacitor in a circuit can … (a) store charge briefly (b) spin a wheel (c) make light (d) measure heat
  17. 17.What does a capacitor do? (a) limits the current (b) makes a beeping sound (c) stores a little charge (d) lets current go one way
  18. 18.🧩 Which part changes electrical energy into movement? (a) an LED (b) a resistor (c) a fuse (d) a motor
  19. 19.What does a buzzer do? (a) lets current go one way (b) turns a fan or wheels (c) makes a beeping sound (d) makes things spin
  20. 20.True or false: a capacitor has coloured bands. (a) True (b) False
  21. 21.What does a motor do? (a) makes a beeping sound (b) has coloured bands (c) smooths a wobbly supply (d) makes things spin
  22. 22.What does a potentiometer do? (a) is a resistance knob (b) blows if current is high (c) has coloured bands (d) glows using little power
  23. 23.True or false: a motor limits the current. (a) True (b) False
  24. 24.🧩 Which component senses how hot it is? (a) LED (b) buzzer (c) transistor (d) thermistor
  25. 25.🧩 Which component smooths a wobbly supply? (a) capacitor (b) motor (c) LDR (d) fuse
  26. 26.True or false: a motor turns a fan or wheels. (a) True (b) False
  27. 27.True or false: a buzzer makes a beeping sound. (a) True (b) False
  28. 28.True or false: a buzzer glows using little power. (a) True (b) False
  29. 29.True or false: a thermistor limits the current. (a) True (b) False
  30. 30.True or false: a buzzer is a resistance knob. (a) True (b) False
  31. 31.True or false: a thermistor stores a little charge. (a) False (b) True
  32. 32.🧩 Which component glows using little power? (a) LED (b) thermistor (c) resistor (d) fuse
  33. 33.True or false: a diode smooths a wobbly supply. (a) True (b) False
  34. 34.🧩 Which component lets current go one way? (a) diode (b) LDR (c) buzzer (d) thermistor
  35. 35.🧩 Which component makes things spin? (a) fuse (b) motor (c) thermistor (d) potentiometer
  36. 36.🧩 Which component stores a little charge? (a) LED (b) resistor (c) thermistor (d) capacitor
  37. 37.True or false: a motor makes things spin. (a) True (b) False
  38. 38.True or false: a motor blows if current is high. (a) True (b) False
  39. 39.🧩 Which component boosts a small signal? (a) potentiometer (b) motor (c) diode (d) transistor
  40. 40.True or false: a resistor limits the current. (a) False (b) True

Answer key

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

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