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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 528 · 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 glows using little power? (a) resistor (b) diode (c) LED (d) buzzer
  2. 2.🧩 Which component senses how bright it is? (a) thermistor (b) potentiometer (c) fuse (d) LDR
  3. 3.True or false: a resistor has coloured bands. (a) False (b) True
  4. 4.True or false: a buzzer senses how hot it is. (a) True (b) False
  5. 5.🧩 Which component smooths a wobbly supply? (a) fuse (b) transistor (c) potentiometer (d) capacitor
  6. 6.🧩 Which part changes electrical energy into movement? (a) an LED (b) a motor (c) a fuse (d) a resistor
  7. 7.What does a fuse do? (a) lets current go one way (b) blows if current is high (c) senses how hot it is (d) stores a little charge
  8. 8.🧩 Which component blows if current is high? (a) fuse (b) motor (c) diode (d) thermistor
  9. 9.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a buzzer (c) a diode (d) a capacitor
  10. 10.🧩 Which component lets current go one way? (a) thermistor (b) potentiometer (c) diode (d) buzzer
  11. 11.True or false: a transistor boosts a small signal. (a) True (b) False
  12. 12.What does a buzzer do? (a) limits the current (b) glows using little power (c) stores a little charge (d) makes a beeping sound
  13. 13.What does a resistor do? (a) smooths a wobbly supply (b) limits the current (c) turns a fan or wheels (d) beeps for an alarm
  14. 14.True or false: a motor turns a fan or wheels. (a) True (b) False
  15. 15.🧩 Which component limits the current? (a) diode (b) resistor (c) transistor (d) potentiometer
  16. 16.What does a motor do? (a) has coloured bands (b) senses how bright it is (c) turns a fan or wheels (d) lets current go one way
  17. 17.What does a capacitor do? (a) glows using little power (b) has coloured bands (c) boosts a small signal (d) smooths a wobbly supply
  18. 18.🧩 Which component has coloured bands? (a) motor (b) resistor (c) LDR (d) potentiometer
  19. 19.🧩 Which component makes things spin? (a) LDR (b) diode (c) thermistor (d) motor
  20. 20.🧩 A capacitor in a circuit can … (a) measure heat (b) make light (c) store charge briefly (d) spin a wheel
  21. 21.True or false: a thermistor limits the current. (a) True (b) False
  22. 22.What does a thermistor do? (a) limits the current (b) senses how hot it is (c) has coloured bands (d) is a resistance knob
  23. 23.🧩 Which component turns a fan or wheels? (a) LED (b) LDR (c) resistor (d) motor
  24. 24.True or false: an LED lets current go one way. (a) False (b) True
  25. 25.What does a resistor do? (a) has coloured bands (b) blows if current is high (c) smooths a wobbly supply (d) turns a fan or wheels
  26. 26.What does a motor do? (a) senses how hot it is (b) limits the current (c) makes things spin (d) beeps for an alarm
  27. 27.🧩 Which component makes a beeping sound? (a) capacitor (b) motor (c) buzzer (d) resistor
  28. 28.True or false: a buzzer has coloured bands. (a) True (b) False
  29. 29.True or false: a thermistor makes a beeping sound. (a) False (b) True
  30. 30.What does an LDR do? (a) makes things spin (b) senses how bright it is (c) smooths a wobbly supply (d) limits the current
  31. 31.True or false: a capacitor stores a little charge. (a) True (b) False
  32. 32.True or false: a capacitor makes a beeping sound. (a) True (b) False
  33. 33.🧩 Which component is a resistance knob? (a) motor (b) LED (c) buzzer (d) potentiometer
  34. 34.True or false: an LDR senses how bright it is. (a) True (b) False
  35. 35.🧩 Which component stores a little charge? (a) thermistor (b) buzzer (c) capacitor (d) resistor
  36. 36.True or false: a buzzer makes a beeping sound. (a) True (b) False
  37. 37.🧩 Which component senses how hot it is? (a) motor (b) capacitor (c) resistor (d) thermistor
  38. 38.True or false: a motor glows using little power. (a) False (b) True
  39. 39.🧩 Which component boosts a small signal? (a) diode (b) transistor (c) resistor (d) LED
  40. 40.True or false: a fuse blows if current is high. (a) True (b) False

Answer key

  1. LED
  2. LDR
  3. True
  4. False
  5. capacitor
  6. a motor
  7. blows if current is high
  8. fuse
  9. a buzzer
  10. diode
  11. True
  12. makes a beeping sound
  13. limits the current
  14. True
  15. resistor
  16. turns a fan or wheels
  17. smooths a wobbly supply
  18. resistor
  19. motor
  20. store charge briefly
  21. False
  22. senses how hot it is
  23. motor
  24. False
  25. has coloured bands
  26. makes things spin
  27. buzzer
  28. False
  29. False
  30. senses how bright it is
  31. True
  32. False
  33. potentiometer
  34. True
  35. capacitor
  36. True
  37. thermistor
  38. False
  39. transistor
  40. True

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