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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 262 · 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.🧩 Which component has coloured bands? (a) LED (b) LDR (c) resistor (d) buzzer
  2. 2.🧩 A capacitor in a circuit can … (a) measure heat (b) spin a wheel (c) store charge briefly (d) make light
  3. 3.What does an LED do? (a) stores a little charge (b) is a resistance knob (c) makes things spin (d) glows using little power
  4. 4.What does a buzzer do? (a) makes a beeping sound (b) senses how hot it is (c) boosts a small signal (d) glows using little power
  5. 5.True or false: a buzzer beeps for an alarm. (a) True (b) False
  6. 6.🧩 Which component beeps for an alarm? (a) buzzer (b) capacitor (c) LED (d) fuse
  7. 7.🧩 Which part changes electrical energy into movement? (a) a fuse (b) a resistor (c) a motor (d) an LED
  8. 8.🧩 Which component senses how bright it is? (a) thermistor (b) diode (c) LDR (d) LED
  9. 9.🧩 Which component senses how hot it is? (a) transistor (b) LED (c) thermistor (d) buzzer
  10. 10.🧩 Which component turns a fan or wheels? (a) motor (b) LED (c) capacitor (d) fuse
  11. 11.🧩 Which component stores a little charge? (a) LED (b) capacitor (c) diode (d) transistor
  12. 12.True or false: a fuse beeps for an alarm. (a) True (b) False
  13. 13.True or false: a diode boosts a small signal. (a) True (b) False
  14. 14.True or false: a fuse makes things spin. (a) False (b) True
  15. 15.What does an LDR do? (a) is a resistance knob (b) senses how bright it is (c) limits the current (d) stores a little charge
  16. 16.True or false: a resistor has coloured bands. (a) False (b) True
  17. 17.What does a transistor do? (a) boosts a small signal (b) is a resistance knob (c) beeps for an alarm (d) senses how bright it is
  18. 18.🧩 Which component boosts a small signal? (a) transistor (b) diode (c) fuse (d) LDR
  19. 19.What does a buzzer do? (a) has coloured bands (b) stores a little charge (c) makes things spin (d) beeps for an alarm
  20. 20.True or false: an LED has coloured bands. (a) True (b) False
  21. 21.True or false: a thermistor blows if current is high. (a) False (b) True
  22. 22.🧩 Which component lets current go one way? (a) transistor (b) fuse (c) LED (d) diode
  23. 23.True or false: a diode lets current go one way. (a) True (b) False
  24. 24.True or false: a motor makes things spin. (a) True (b) False
  25. 25.True or false: an LED glows using little power. (a) False (b) True
  26. 26.True or false: a resistor limits the current. (a) False (b) True
  27. 27.🧩 Which component blows if current is high? (a) diode (b) transistor (c) thermistor (d) fuse
  28. 28.What does a motor do? (a) stores a little charge (b) senses how bright it is (c) turns a fan or wheels (d) glows using little power
  29. 29.True or false: a transistor boosts a small signal. (a) False (b) True
  30. 30.True or false: a buzzer makes a beeping sound. (a) False (b) True
  31. 31.🧩 Which component makes a beeping sound? (a) potentiometer (b) buzzer (c) transistor (d) LDR
  32. 32.What does a diode do? (a) turns a fan or wheels (b) limits the current (c) smooths a wobbly supply (d) lets current go one way
  33. 33.What does a capacitor do? (a) senses how hot it is (b) limits the current (c) turns a fan or wheels (d) smooths a wobbly supply
  34. 34.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a capacitor (c) a diode (d) a buzzer
  35. 35.True or false: a resistor stores a little charge. (a) False (b) True
  36. 36.True or false: an LDR has coloured bands. (a) True (b) False
  37. 37.🧩 Which component makes things spin? (a) fuse (b) buzzer (c) thermistor (d) motor
  38. 38.🧩 Which component glows using little power? (a) resistor (b) LED (c) thermistor (d) capacitor
  39. 39.True or false: a potentiometer makes a beeping sound. (a) False (b) True
  40. 40.True or false: a buzzer is a resistance knob. (a) False (b) True

Answer key

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

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