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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 103 · 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 fuse do? (a) blows if current is high (b) glows using little power (c) makes a beeping sound (d) stores a little charge
  2. 2.🧩 Which part changes electrical energy into movement? (a) a resistor (b) an LED (c) a fuse (d) a motor
  3. 3.What does an LDR do? (a) boosts a small signal (b) makes things spin (c) blows if current is high (d) senses how bright it is
  4. 4.True or false: a buzzer lets current go one way. (a) False (b) True
  5. 5.What does a buzzer do? (a) beeps for an alarm (b) blows if current is high (c) is a resistance knob (d) senses how bright it is
  6. 6.🧩 Which component glows using little power? (a) potentiometer (b) buzzer (c) fuse (d) LED
  7. 7.True or false: a potentiometer is a resistance knob. (a) True (b) False
  8. 8.🧩 Which component senses how hot it is? (a) motor (b) fuse (c) thermistor (d) resistor
  9. 9.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a diode (c) a capacitor (d) a buzzer
  10. 10.True or false: a diode senses how bright it is. (a) True (b) False
  11. 11.🧩 A capacitor in a circuit can … (a) store charge briefly (b) make light (c) spin a wheel (d) measure heat
  12. 12.What does a diode do? (a) is a resistance knob (b) has coloured bands (c) senses how hot it is (d) lets current go one way
  13. 13.🧩 Which component boosts a small signal? (a) LDR (b) buzzer (c) LED (d) transistor
  14. 14.True or false: a motor makes things spin. (a) True (b) False
  15. 15.What does a capacitor do? (a) stores a little charge (b) turns a fan or wheels (c) senses how bright it is (d) boosts a small signal
  16. 16.🧩 Which component beeps for an alarm? (a) buzzer (b) capacitor (c) thermistor (d) LED
  17. 17.True or false: a capacitor boosts a small signal. (a) False (b) True
  18. 18.True or false: a potentiometer makes things spin. (a) True (b) False
  19. 19.🧩 Which component limits the current? (a) transistor (b) resistor (c) motor (d) buzzer
  20. 20.True or false: an LED glows using little power. (a) True (b) False
  21. 21.🧩 Which component has coloured bands? (a) resistor (b) potentiometer (c) buzzer (d) motor
  22. 22.🧩 Which component turns a fan or wheels? (a) thermistor (b) motor (c) LDR (d) diode
  23. 23.What does an LED do? (a) glows using little power (b) beeps for an alarm (c) has coloured bands (d) limits the current
  24. 24.🧩 Which component is a resistance knob? (a) thermistor (b) resistor (c) potentiometer (d) fuse
  25. 25.What does a potentiometer do? (a) senses how bright it is (b) lets current go one way (c) is a resistance knob (d) has coloured bands
  26. 26.What does a buzzer do? (a) blows if current is high (b) boosts a small signal (c) makes a beeping sound (d) turns a fan or wheels
  27. 27.🧩 Which component makes things spin? (a) motor (b) resistor (c) diode (d) LED
  28. 28.True or false: a resistor beeps for an alarm. (a) True (b) False
  29. 29.True or false: a thermistor senses how bright it is. (a) False (b) True
  30. 30.True or false: a resistor limits the current. (a) True (b) False
  31. 31.🧩 Which component stores a little charge? (a) capacitor (b) potentiometer (c) thermistor (d) diode
  32. 32.What does a resistor do? (a) boosts a small signal (b) is a resistance knob (c) lets current go one way (d) limits the current
  33. 33.True or false: a capacitor smooths a wobbly supply. (a) True (b) False
  34. 34.True or false: a thermistor is a resistance knob. (a) True (b) False
  35. 35.What does a capacitor do? (a) is a resistance knob (b) smooths a wobbly supply (c) senses how hot it is (d) glows using little power
  36. 36.True or false: a buzzer makes a beeping sound. (a) False (b) True
  37. 37.What does a motor do? (a) has coloured bands (b) lets current go one way (c) turns a fan or wheels (d) stores a little charge
  38. 38.True or false: an LED stores a little charge. (a) False (b) True
  39. 39.True or false: a diode lets current go one way. (a) False (b) True
  40. 40.True or false: a resistor has coloured bands. (a) False (b) True

Answer key

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

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