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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 47 · 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 smooths a wobbly supply? (a) potentiometer (b) thermistor (c) capacitor (d) fuse
  2. 2.🧩 Which component makes a beeping sound? (a) potentiometer (b) LED (c) buzzer (d) transistor
  3. 3.🧩 Which part changes electrical energy into movement? (a) a motor (b) a fuse (c) a resistor (d) an LED
  4. 4.🧩 Which component makes things spin? (a) LDR (b) diode (c) fuse (d) motor
  5. 5.True or false: a capacitor senses how hot it is. (a) True (b) False
  6. 6.🧩 Which component turns a fan or wheels? (a) LED (b) motor (c) resistor (d) fuse
  7. 7.🧩 Which component has coloured bands? (a) diode (b) resistor (c) motor (d) buzzer
  8. 8.True or false: a potentiometer smooths a wobbly supply. (a) False (b) True
  9. 9.🧩 Which component senses how hot it is? (a) potentiometer (b) fuse (c) capacitor (d) thermistor
  10. 10.🧩 Which component beeps for an alarm? (a) capacitor (b) motor (c) resistor (d) buzzer
  11. 11.What does a thermistor do? (a) blows if current is high (b) senses how hot it is (c) smooths a wobbly supply (d) senses how bright it is
  12. 12.🧩 Which component limits the current? (a) capacitor (b) LED (c) resistor (d) potentiometer
  13. 13.What does a resistor do? (a) smooths a wobbly supply (b) limits the current (c) turns a fan or wheels (d) stores a little charge
  14. 14.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a buzzer (c) a resistor (d) a diode
  15. 15.🧩 Which component is a resistance knob? (a) diode (b) potentiometer (c) resistor (d) transistor
  16. 16.What does a buzzer do? (a) has coloured bands (b) smooths a wobbly supply (c) blows if current is high (d) beeps for an alarm
  17. 17.What does a fuse do? (a) blows if current is high (b) limits the current (c) makes a beeping sound (d) smooths a wobbly supply
  18. 18.True or false: a resistor senses how hot it is. (a) False (b) True
  19. 19.What does a resistor do? (a) has coloured bands (b) boosts a small signal (c) makes a beeping sound (d) smooths a wobbly supply
  20. 20.True or false: a fuse blows if current is high. (a) False (b) True
  21. 21.What does a transistor do? (a) stores a little charge (b) boosts a small signal (c) is a resistance knob (d) smooths a wobbly supply
  22. 22.What does an LDR do? (a) smooths a wobbly supply (b) stores a little charge (c) is a resistance knob (d) senses how bright it is
  23. 23.True or false: a capacitor beeps for an alarm. (a) True (b) False
  24. 24.True or false: a transistor limits the current. (a) False (b) True
  25. 25.True or false: a thermistor has coloured bands. (a) False (b) True
  26. 26.🧩 Which component senses how bright it is? (a) LDR (b) thermistor (c) capacitor (d) potentiometer
  27. 27.What does a capacitor do? (a) glows using little power (b) makes things spin (c) smooths a wobbly supply (d) lets current go one way
  28. 28.True or false: a diode smooths a wobbly supply. (a) True (b) False
  29. 29.True or false: a transistor boosts a small signal. (a) False (b) True
  30. 30.What does an LED do? (a) blows if current is high (b) lets current go one way (c) beeps for an alarm (d) glows using little power
  31. 31.True or false: a motor makes things spin. (a) True (b) False
  32. 32.True or false: an LDR turns a fan or wheels. (a) False (b) True
  33. 33.True or false: a resistor makes a beeping sound. (a) False (b) True
  34. 34.🧩 A capacitor in a circuit can … (a) measure heat (b) make light (c) store charge briefly (d) spin a wheel
  35. 35.True or false: a potentiometer is a resistance knob. (a) True (b) False
  36. 36.🧩 Which component glows using little power? (a) LED (b) thermistor (c) diode (d) capacitor
  37. 37.🧩 Which component lets current go one way? (a) diode (b) capacitor (c) potentiometer (d) motor
  38. 38.True or false: a buzzer makes a beeping sound. (a) True (b) False
  39. 39.What does a capacitor do? (a) makes things spin (b) stores a little charge (c) limits the current (d) senses how bright it is
  40. 40.🧩 Which component stores a little charge? (a) transistor (b) capacitor (c) fuse (d) diode

Answer key

  1. capacitor
  2. buzzer
  3. a motor
  4. motor
  5. False
  6. motor
  7. resistor
  8. False
  9. thermistor
  10. buzzer
  11. senses how hot it is
  12. resistor
  13. limits the current
  14. a buzzer
  15. potentiometer
  16. beeps for an alarm
  17. blows if current is high
  18. False
  19. has coloured bands
  20. True
  21. boosts a small signal
  22. senses how bright it is
  23. False
  24. False
  25. False
  26. LDR
  27. smooths a wobbly supply
  28. False
  29. True
  30. glows using little power
  31. True
  32. False
  33. False
  34. store charge briefly
  35. True
  36. LED
  37. diode
  38. True
  39. stores a little charge
  40. capacitor

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