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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 122 · 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 transistor boosts a small signal. (a) False (b) True
  2. 2.True or false: a motor turns a fan or wheels. (a) True (b) False
  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 part changes electrical energy into movement? (a) a motor (b) a resistor (c) a fuse (d) an LED
  5. 5.🧩 Which component turns a fan or wheels? (a) motor (b) diode (c) potentiometer (d) capacitor
  6. 6.What does a potentiometer do? (a) stores a little charge (b) lets current go one way (c) limits the current (d) is a resistance knob
  7. 7.🧩 Which component blows if current is high? (a) fuse (b) potentiometer (c) LDR (d) LED
  8. 8.True or false: a resistor has coloured bands. (a) False (b) True
  9. 9.🧩 Which component senses how hot it is? (a) diode (b) capacitor (c) resistor (d) thermistor
  10. 10.True or false: a buzzer limits the current. (a) False (b) True
  11. 11.🧩 Which component makes things spin? (a) LED (b) fuse (c) motor (d) transistor
  12. 12.🧩 Which component glows using little power? (a) LED (b) transistor (c) resistor (d) capacitor
  13. 13.What does a thermistor do? (a) is a resistance knob (b) makes a beeping sound (c) senses how hot it is (d) limits the current
  14. 14.True or false: a diode smooths a wobbly supply. (a) True (b) False
  15. 15.True or false: a thermistor beeps for an alarm. (a) False (b) True
  16. 16.🧩 Which component lets current go one way? (a) resistor (b) buzzer (c) diode (d) LED
  17. 17.🧩 Which component beeps for an alarm? (a) LDR (b) transistor (c) buzzer (d) resistor
  18. 18.True or false: a thermistor senses how hot it is. (a) True (b) False
  19. 19.What does a motor do? (a) is a resistance knob (b) turns a fan or wheels (c) boosts a small signal (d) stores a little charge
  20. 20.True or false: a potentiometer senses how hot it is. (a) True (b) False
  21. 21.🧩 Which component has coloured bands? (a) resistor (b) motor (c) LDR (d) transistor
  22. 22.What does a fuse do? (a) blows if current is high (b) stores a little charge (c) boosts a small signal (d) makes a beeping sound
  23. 23.What does a buzzer do? (a) senses how hot it is (b) limits the current (c) senses how bright it is (d) makes a beeping sound
  24. 24.What does a diode do? (a) stores a little charge (b) senses how hot it is (c) lets current go one way (d) glows using little power
  25. 25.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a buzzer (c) a capacitor (d) a diode
  26. 26.True or false: a buzzer beeps for an alarm. (a) True (b) False
  27. 27.True or false: a diode beeps for an alarm. (a) True (b) False
  28. 28.🧩 Which component limits the current? (a) thermistor (b) resistor (c) fuse (d) capacitor
  29. 29.What does a capacitor do? (a) makes a beeping sound (b) stores a little charge (c) has coloured bands (d) beeps for an alarm
  30. 30.What does an LDR do? (a) has coloured bands (b) turns a fan or wheels (c) senses how bright it is (d) boosts a small signal
  31. 31.True or false: a fuse has coloured bands. (a) False (b) True
  32. 32.True or false: a fuse senses how hot it is. (a) True (b) False
  33. 33.True or false: a buzzer lets current go one way. (a) False (b) True
  34. 34.True or false: a buzzer makes a beeping sound. (a) True (b) False
  35. 35.What does an LED do? (a) glows using little power (b) blows if current is high (c) lets current go one way (d) stores a little charge
  36. 36.True or false: a resistor limits the current. (a) False (b) True
  37. 37.True or false: a capacitor stores a little charge. (a) True (b) False
  38. 38.🧩 Which component stores a little charge? (a) LDR (b) capacitor (c) LED (d) buzzer
  39. 39.True or false: a diode lets current go one way. (a) False (b) True
  40. 40.What does a resistor do? (a) makes a beeping sound (b) limits the current (c) beeps for an alarm (d) stores a little charge

Answer key

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

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