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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 574 · 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.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
  2. 2.🧩 Which component boosts a small signal? (a) transistor (b) buzzer (c) resistor (d) LED
  3. 3.🧩 Which part changes electrical energy into sound? (a) a diode (b) a resistor (c) a buzzer (d) a capacitor
  4. 4.True or false: a fuse makes a beeping sound. (a) False (b) True
  5. 5.🧩 Which component blows if current is high? (a) thermistor (b) fuse (c) capacitor (d) transistor
  6. 6.🧩 Which component beeps for an alarm? (a) diode (b) thermistor (c) motor (d) buzzer
  7. 7.🧩 A capacitor in a circuit can … (a) make light (b) store charge briefly (c) spin a wheel (d) measure heat
  8. 8.What does a fuse do? (a) limits the current (b) boosts a small signal (c) lets current go one way (d) blows if current is high
  9. 9.🧩 Which component senses how bright it is? (a) thermistor (b) LDR (c) transistor (d) diode
  10. 10.🧩 Which component lets current go one way? (a) transistor (b) LDR (c) LED (d) diode
  11. 11.🧩 Which component turns a fan or wheels? (a) buzzer (b) thermistor (c) capacitor (d) motor
  12. 12.True or false: a fuse blows if current is high. (a) True (b) False
  13. 13.🧩 Which component limits the current? (a) resistor (b) LED (c) capacitor (d) fuse
  14. 14.What does an LDR do? (a) glows using little power (b) senses how bright it is (c) beeps for an alarm (d) limits the current
  15. 15.🧩 Which component smooths a wobbly supply? (a) fuse (b) resistor (c) capacitor (d) diode
  16. 16.What does a diode do? (a) lets current go one way (b) turns a fan or wheels (c) stores a little charge (d) smooths a wobbly supply
  17. 17.🧩 Which part changes electrical energy into movement? (a) a fuse (b) a resistor (c) an LED (d) a motor
  18. 18.🧩 Which component glows using little power? (a) LED (b) thermistor (c) potentiometer (d) resistor
  19. 19.What does an LED do? (a) has coloured bands (b) stores a little charge (c) glows using little power (d) smooths a wobbly supply
  20. 20.True or false: a diode lets current go one way. (a) False (b) True
  21. 21.What does a transistor do? (a) is a resistance knob (b) limits the current (c) boosts a small signal (d) senses how bright it is
  22. 22.🧩 Which component has coloured bands? (a) motor (b) capacitor (c) buzzer (d) resistor
  23. 23.🧩 Which component makes things spin? (a) fuse (b) motor (c) capacitor (d) resistor
  24. 24.What does a motor do? (a) smooths a wobbly supply (b) glows using little power (c) limits the current (d) turns a fan or wheels
  25. 25.True or false: a potentiometer smooths a wobbly supply. (a) True (b) False
  26. 26.What does a resistor do? (a) makes a beeping sound (b) has coloured bands (c) senses how hot it is (d) smooths a wobbly supply
  27. 27.🧩 Which component is a resistance knob? (a) capacitor (b) buzzer (c) LED (d) potentiometer
  28. 28.True or false: a thermistor is a resistance knob. (a) False (b) True
  29. 29.True or false: a buzzer makes a beeping sound. (a) False (b) True
  30. 30.True or false: an LED glows using little power. (a) True (b) False
  31. 31.True or false: a capacitor stores a little charge. (a) True (b) False
  32. 32.What does a capacitor do? (a) senses how hot it is (b) glows using little power (c) stores a little charge (d) boosts a small signal
  33. 33.True or false: a transistor blows if current is high. (a) True (b) False
  34. 34.True or false: a resistor makes a beeping sound. (a) False (b) True
  35. 35.What does a thermistor do? (a) has coloured bands (b) senses how hot it is (c) limits the current (d) makes things spin
  36. 36.🧩 Which component makes a beeping sound? (a) transistor (b) buzzer (c) LDR (d) LED
  37. 37.🧩 Which component stores a little charge? (a) motor (b) transistor (c) capacitor (d) resistor
  38. 38.True or false: a potentiometer stores a little charge. (a) True (b) False
  39. 39.True or false: a resistor limits the current. (a) True (b) False
  40. 40.🧩 Which component senses how hot it is? (a) diode (b) buzzer (c) transistor (d) thermistor

Answer key

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

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