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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 157 · 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) boosts a small signal (b) limits the current (c) senses how hot it is (d) has coloured bands
  2. 2.True or false: a transistor boosts a small signal. (a) True (b) False
  3. 3.True or false: a capacitor stores a little charge. (a) False (b) True
  4. 4.True or false: a buzzer has coloured bands. (a) False (b) True
  5. 5.True or false: a capacitor is a resistance knob. (a) False (b) True
  6. 6.🧩 Which part changes electrical energy into movement? (a) a resistor (b) an LED (c) a fuse (d) a motor
  7. 7.🧩 A capacitor in a circuit can … (a) make light (b) spin a wheel (c) store charge briefly (d) measure heat
  8. 8.True or false: a potentiometer lets current go one way. (a) True (b) False
  9. 9.What does a thermistor do? (a) beeps for an alarm (b) blows if current is high (c) limits the current (d) senses how hot it is
  10. 10.What does a resistor do? (a) limits the current (b) makes things spin (c) stores a little charge (d) beeps for an alarm
  11. 11.🧩 Which component stores a little charge? (a) LED (b) potentiometer (c) capacitor (d) resistor
  12. 12.True or false: a motor senses how bright it is. (a) True (b) False
  13. 13.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a diode (c) a buzzer (d) a capacitor
  14. 14.What does a potentiometer do? (a) senses how hot it is (b) glows using little power (c) limits the current (d) is a resistance knob
  15. 15.True or false: a buzzer beeps for an alarm. (a) True (b) False
  16. 16.🧩 Which component blows if current is high? (a) fuse (b) transistor (c) potentiometer (d) resistor
  17. 17.What does a motor do? (a) turns a fan or wheels (b) boosts a small signal (c) beeps for an alarm (d) is a resistance knob
  18. 18.True or false: a diode lets current go one way. (a) True (b) False
  19. 19.🧩 Which component beeps for an alarm? (a) thermistor (b) fuse (c) buzzer (d) diode
  20. 20.True or false: a capacitor makes a beeping sound. (a) True (b) False
  21. 21.🧩 Which component limits the current? (a) resistor (b) motor (c) diode (d) thermistor
  22. 22.True or false: a transistor senses how hot it is. (a) True (b) False
  23. 23.🧩 Which component senses how hot it is? (a) transistor (b) thermistor (c) resistor (d) diode
  24. 24.🧩 Which component makes a beeping sound? (a) thermistor (b) fuse (c) buzzer (d) potentiometer
  25. 25.🧩 Which component lets current go one way? (a) transistor (b) potentiometer (c) diode (d) motor
  26. 26.True or false: a diode glows using little power. (a) False (b) True
  27. 27.True or false: a transistor beeps for an alarm. (a) True (b) False
  28. 28.True or false: a resistor glows using little power. (a) False (b) True
  29. 29.🧩 Which component smooths a wobbly supply? (a) capacitor (b) thermistor (c) buzzer (d) diode
  30. 30.🧩 Which component boosts a small signal? (a) motor (b) diode (c) potentiometer (d) transistor
  31. 31.🧩 Which component glows using little power? (a) LDR (b) fuse (c) resistor (d) LED
  32. 32.What does an LDR do? (a) is a resistance knob (b) senses how bright it is (c) limits the current (d) senses how hot it is
  33. 33.🧩 Which component has coloured bands? (a) thermistor (b) potentiometer (c) fuse (d) resistor
  34. 34.🧩 Which component makes things spin? (a) motor (b) diode (c) buzzer (d) fuse
  35. 35.What does a fuse do? (a) lets current go one way (b) blows if current is high (c) boosts a small signal (d) makes things spin
  36. 36.True or false: an LED makes things spin. (a) False (b) True
  37. 37.True or false: a thermistor makes things spin. (a) True (b) False
  38. 38.What does a capacitor do? (a) limits the current (b) makes a beeping sound (c) is a resistance knob (d) stores a little charge
  39. 39.True or false: a resistor beeps for an alarm. (a) True (b) False
  40. 40.True or false: a motor limits the current. (a) False (b) True

Answer key

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

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