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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 206 · 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) makes a beeping sound (b) glows using little power (c) boosts a small signal (d) turns a fan or wheels
  2. 2.🧩 Which component boosts a small signal? (a) thermistor (b) transistor (c) diode (d) LDR
  3. 3.🧩 A capacitor in a circuit can … (a) spin a wheel (b) make light (c) measure heat (d) store charge briefly
  4. 4.🧩 Which component has coloured bands? (a) capacitor (b) resistor (c) LED (d) thermistor
  5. 5.🧩 Which component limits the current? (a) diode (b) resistor (c) fuse (d) LED
  6. 6.True or false: a potentiometer smooths a wobbly supply. (a) False (b) True
  7. 7.What does a diode do? (a) turns a fan or wheels (b) senses how bright it is (c) limits the current (d) lets current go one way
  8. 8.🧩 Which component glows using little power? (a) fuse (b) LDR (c) buzzer (d) LED
  9. 9.What does a fuse do? (a) has coloured bands (b) stores a little charge (c) makes a beeping sound (d) blows if current is high
  10. 10.True or false: an LDR turns a fan or wheels. (a) False (b) True
  11. 11.What does a potentiometer do? (a) turns a fan or wheels (b) beeps for an alarm (c) blows if current is high (d) is a resistance knob
  12. 12.🧩 Which component blows if current is high? (a) fuse (b) potentiometer (c) buzzer (d) transistor
  13. 13.What does a resistor do? (a) limits the current (b) beeps for an alarm (c) stores a little charge (d) boosts a small signal
  14. 14.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a diode (c) a buzzer (d) a resistor
  15. 15.🧩 Which component makes things spin? (a) LDR (b) potentiometer (c) diode (d) motor
  16. 16.🧩 Which component makes a beeping sound? (a) fuse (b) diode (c) buzzer (d) resistor
  17. 17.🧩 Which component smooths a wobbly supply? (a) motor (b) potentiometer (c) capacitor (d) diode
  18. 18.What does a capacitor do? (a) stores a little charge (b) turns a fan or wheels (c) lets current go one way (d) has coloured bands
  19. 19.🧩 Which component senses how hot it is? (a) LDR (b) thermistor (c) capacitor (d) motor
  20. 20.What does an LDR do? (a) limits the current (b) smooths a wobbly supply (c) senses how bright it is (d) turns a fan or wheels
  21. 21.What does an LED do? (a) blows if current is high (b) glows using little power (c) boosts a small signal (d) is a resistance knob
  22. 22.True or false: a buzzer is a resistance knob. (a) True (b) False
  23. 23.True or false: a motor turns a fan or wheels. (a) False (b) True
  24. 24.What does a thermistor do? (a) senses how hot it is (b) senses how bright it is (c) lets current go one way (d) stores a little charge
  25. 25.What does a buzzer do? (a) blows if current is high (b) has coloured bands (c) makes a beeping sound (d) senses how hot it is
  26. 26.What does a capacitor do? (a) boosts a small signal (b) lets current go one way (c) senses how hot it is (d) smooths a wobbly supply
  27. 27.🧩 Which component lets current go one way? (a) thermistor (b) diode (c) resistor (d) LDR
  28. 28.True or false: a potentiometer is a resistance knob. (a) True (b) False
  29. 29.🧩 Which component senses how bright it is? (a) diode (b) LDR (c) resistor (d) thermistor
  30. 30.🧩 Which part changes electrical energy into movement? (a) a fuse (b) a resistor (c) an LED (d) a motor
  31. 31.True or false: a motor makes things spin. (a) True (b) False
  32. 32.True or false: a capacitor makes things spin. (a) True (b) False
  33. 33.🧩 Which component is a resistance knob? (a) resistor (b) potentiometer (c) capacitor (d) fuse
  34. 34.True or false: a buzzer senses how hot it is. (a) True (b) False
  35. 35.True or false: a thermistor senses how hot it is. (a) False (b) True
  36. 36.True or false: a transistor stores a little charge. (a) False (b) True
  37. 37.True or false: a buzzer lets current go one way. (a) False (b) True
  38. 38.🧩 Which component turns a fan or wheels? (a) resistor (b) motor (c) LED (d) capacitor
  39. 39.🧩 Which component limits the current? (a) capacitor (b) resistor (c) motor (d) fuse
  40. 40.True or false: a diode limits the current. (a) True (b) False

Answer key

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

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