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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 50 · 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 is a resistance knob? (a) buzzer (b) potentiometer (c) fuse (d) motor
  2. 2.🧩 Which component smooths a wobbly supply? (a) capacitor (b) transistor (c) buzzer (d) motor
  3. 3.🧩 Which component makes a beeping sound? (a) LED (b) thermistor (c) buzzer (d) transistor
  4. 4.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a diode (c) a buzzer (d) a resistor
  5. 5.🧩 Which component senses how hot it is? (a) potentiometer (b) thermistor (c) diode (d) transistor
  6. 6.🧩 Which component makes things spin? (a) transistor (b) motor (c) thermistor (d) LDR
  7. 7.True or false: a thermistor limits the current. (a) False (b) True
  8. 8.What does a buzzer do? (a) senses how hot it is (b) smooths a wobbly supply (c) turns a fan or wheels (d) beeps for an alarm
  9. 9.What does a thermistor do? (a) limits the current (b) smooths a wobbly supply (c) glows using little power (d) senses how hot it is
  10. 10.True or false: a buzzer beeps for an alarm. (a) False (b) True
  11. 11.What does a motor do? (a) beeps for an alarm (b) limits the current (c) makes things spin (d) is a resistance knob
  12. 12.🧩 Which component limits the current? (a) resistor (b) diode (c) potentiometer (d) LDR
  13. 13.🧩 Which component turns a fan or wheels? (a) LED (b) fuse (c) motor (d) resistor
  14. 14.True or false: an LDR turns a fan or wheels. (a) False (b) True
  15. 15.True or false: a motor turns a fan or wheels. (a) False (b) True
  16. 16.🧩 Which part changes electrical energy into movement? (a) a resistor (b) an LED (c) a fuse (d) a motor
  17. 17.🧩 Which component blows if current is high? (a) LED (b) fuse (c) thermistor (d) buzzer
  18. 18.True or false: a capacitor smooths a wobbly supply. (a) True (b) False
  19. 19.True or false: a resistor beeps for an alarm. (a) True (b) False
  20. 20.True or false: a diode turns a fan or wheels. (a) True (b) False
  21. 21.What does a resistor do? (a) stores a little charge (b) makes things spin (c) limits the current (d) smooths a wobbly supply
  22. 22.What does a capacitor do? (a) senses how hot it is (b) stores a little charge (c) makes things spin (d) has coloured bands
  23. 23.🧩 A capacitor in a circuit can … (a) spin a wheel (b) measure heat (c) make light (d) store charge briefly
  24. 24.🧩 Which component has coloured bands? (a) potentiometer (b) capacitor (c) resistor (d) thermistor
  25. 25.True or false: a resistor limits the current. (a) True (b) False
  26. 26.What does a fuse do? (a) makes a beeping sound (b) turns a fan or wheels (c) lets current go one way (d) blows if current is high
  27. 27.True or false: a buzzer makes a beeping sound. (a) False (b) True
  28. 28.True or false: a potentiometer is a resistance knob. (a) False (b) True
  29. 29.What does a capacitor do? (a) is a resistance knob (b) makes a beeping sound (c) boosts a small signal (d) smooths a wobbly supply
  30. 30.True or false: an LDR limits the current. (a) True (b) False
  31. 31.True or false: a motor senses how hot it is. (a) True (b) False
  32. 32.True or false: a capacitor stores a little charge. (a) True (b) False
  33. 33.What does a diode do? (a) lets current go one way (b) has coloured bands (c) senses how hot it is (d) turns a fan or wheels
  34. 34.True or false: an LED makes things spin. (a) False (b) True
  35. 35.What does a buzzer do? (a) smooths a wobbly supply (b) makes things spin (c) makes a beeping sound (d) lets current go one way
  36. 36.🧩 Which component beeps for an alarm? (a) motor (b) diode (c) LDR (d) buzzer
  37. 37.What does an LED do? (a) glows using little power (b) makes a beeping sound (c) is a resistance knob (d) makes things spin
  38. 38.True or false: an LED glows using little power. (a) True (b) False
  39. 39.True or false: a fuse limits the current. (a) False (b) True
  40. 40.True or false: a resistor stores a little charge. (a) False (b) True

Answer key

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

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