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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 283 · 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 fuse senses how hot it is. (a) True (b) False
  2. 2.What does a buzzer do? (a) senses how bright it is (b) makes a beeping sound (c) limits the current (d) stores a little charge
  3. 3.🧩 A capacitor in a circuit can … (a) spin a wheel (b) make light (c) measure heat (d) store charge briefly
  4. 4.True or false: a buzzer has coloured bands. (a) False (b) True
  5. 5.What does a diode do? (a) stores a little charge (b) glows using little power (c) lets current go one way (d) blows if current is high
  6. 6.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a buzzer (c) a diode (d) a capacitor
  7. 7.🧩 Which part changes electrical energy into movement? (a) a fuse (b) an LED (c) a resistor (d) a motor
  8. 8.What does a resistor do? (a) smooths a wobbly supply (b) senses how bright it is (c) boosts a small signal (d) has coloured bands
  9. 9.🧩 Which component is a resistance knob? (a) potentiometer (b) thermistor (c) buzzer (d) LED
  10. 10.True or false: a resistor limits the current. (a) True (b) False
  11. 11.What does a fuse do? (a) smooths a wobbly supply (b) turns a fan or wheels (c) blows if current is high (d) lets current go one way
  12. 12.True or false: a diode smooths a wobbly supply. (a) False (b) True
  13. 13.True or false: a buzzer beeps for an alarm. (a) True (b) False
  14. 14.🧩 Which component lets current go one way? (a) LED (b) potentiometer (c) resistor (d) diode
  15. 15.🧩 Which component stores a little charge? (a) capacitor (b) motor (c) buzzer (d) thermistor
  16. 16.What does a resistor do? (a) boosts a small signal (b) senses how bright it is (c) limits the current (d) senses how hot it is
  17. 17.🧩 Which component glows using little power? (a) LED (b) potentiometer (c) buzzer (d) capacitor
  18. 18.🧩 Which component smooths a wobbly supply? (a) capacitor (b) buzzer (c) fuse (d) potentiometer
  19. 19.True or false: a motor makes things spin. (a) False (b) True
  20. 20.What does a capacitor do? (a) stores a little charge (b) blows if current is high (c) lets current go one way (d) senses how bright it is
  21. 21.True or false: a fuse blows if current is high. (a) False (b) True
  22. 22.True or false: a diode has coloured bands. (a) False (b) True
  23. 23.🧩 Which component limits the current? (a) resistor (b) buzzer (c) fuse (d) diode
  24. 24.True or false: an LDR limits the current. (a) False (b) True
  25. 25.What does a transistor do? (a) boosts a small signal (b) makes things spin (c) limits the current (d) senses how bright it is
  26. 26.True or false: an LDR glows using little power. (a) False (b) True
  27. 27.True or false: a capacitor stores a little charge. (a) False (b) True
  28. 28.True or false: a transistor makes things spin. (a) True (b) False
  29. 29.🧩 Which component beeps for an alarm? (a) fuse (b) buzzer (c) transistor (d) motor
  30. 30.What does an LDR do? (a) makes things spin (b) smooths a wobbly supply (c) senses how bright it is (d) lets current go one way
  31. 31.True or false: a potentiometer makes things spin. (a) False (b) True
  32. 32.What does a potentiometer do? (a) senses how bright it is (b) is a resistance knob (c) makes a beeping sound (d) smooths a wobbly supply
  33. 33.True or false: a resistor boosts a small signal. (a) False (b) True
  34. 34.🧩 Which component makes things spin? (a) thermistor (b) motor (c) buzzer (d) resistor
  35. 35.🧩 Which component senses how bright it is? (a) motor (b) potentiometer (c) LDR (d) buzzer
  36. 36.True or false: an LED is a resistance knob. (a) True (b) False
  37. 37.True or false: a resistor has coloured bands. (a) True (b) False
  38. 38.True or false: a capacitor limits the current. (a) True (b) False
  39. 39.True or false: a transistor has coloured bands. (a) False (b) True
  40. 40.🧩 Which component turns a fan or wheels? (a) motor (b) capacitor (c) LDR (d) potentiometer

Answer key

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

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