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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 417 · 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 capacitor has coloured bands. (a) True (b) False
  2. 2.🧩 A capacitor in a circuit can … (a) spin a wheel (b) measure heat (c) store charge briefly (d) make light
  3. 3.What does a capacitor do? (a) senses how bright it is (b) stores a little charge (c) beeps for an alarm (d) makes a beeping sound
  4. 4.🧩 Which component glows using little power? (a) buzzer (b) LED (c) potentiometer (d) transistor
  5. 5.True or false: a fuse glows using little power. (a) False (b) True
  6. 6.🧩 Which component smooths a wobbly supply? (a) LDR (b) fuse (c) resistor (d) capacitor
  7. 7.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a diode (c) a capacitor (d) a buzzer
  8. 8.What does a buzzer do? (a) beeps for an alarm (b) limits the current (c) blows if current is high (d) senses how hot it is
  9. 9.True or false: a capacitor limits the current. (a) True (b) False
  10. 10.🧩 Which component turns a fan or wheels? (a) motor (b) LDR (c) resistor (d) diode
  11. 11.What does a fuse do? (a) makes things spin (b) is a resistance knob (c) limits the current (d) blows if current is high
  12. 12.🧩 Which part changes electrical energy into movement? (a) a motor (b) an LED (c) a fuse (d) a resistor
  13. 13.🧩 Which component limits the current? (a) transistor (b) motor (c) LDR (d) resistor
  14. 14.🧩 Which component makes things spin? (a) diode (b) motor (c) resistor (d) transistor
  15. 15.What does an LED do? (a) blows if current is high (b) makes a beeping sound (c) glows using little power (d) stores a little charge
  16. 16.True or false: a diode makes things spin. (a) False (b) True
  17. 17.🧩 Which component has coloured bands? (a) fuse (b) thermistor (c) motor (d) resistor
  18. 18.True or false: a motor makes things spin. (a) True (b) False
  19. 19.What does a resistor do? (a) makes things spin (b) limits the current (c) boosts a small signal (d) smooths a wobbly supply
  20. 20.True or false: an LDR has coloured bands. (a) False (b) True
  21. 21.True or false: a diode senses how bright it is. (a) True (b) False
  22. 22.True or false: a potentiometer lets current go one way. (a) False (b) True
  23. 23.🧩 Which component stores a little charge? (a) resistor (b) buzzer (c) potentiometer (d) capacitor
  24. 24.True or false: a fuse limits the current. (a) True (b) False
  25. 25.True or false: an LED has coloured bands. (a) True (b) False
  26. 26.🧩 Which component boosts a small signal? (a) resistor (b) motor (c) thermistor (d) transistor
  27. 27.🧩 Which component lets current go one way? (a) LDR (b) diode (c) transistor (d) motor
  28. 28.True or false: a thermistor lets current go one way. (a) False (b) True
  29. 29.True or false: a thermistor makes things spin. (a) False (b) True
  30. 30.True or false: a thermistor senses how hot it is. (a) True (b) False
  31. 31.True or false: a diode lets current go one way. (a) False (b) True
  32. 32.True or false: a resistor has coloured bands. (a) True (b) False
  33. 33.What does a transistor do? (a) senses how bright it is (b) limits the current (c) boosts a small signal (d) blows if current is high
  34. 34.What does a capacitor do? (a) smooths a wobbly supply (b) turns a fan or wheels (c) glows using little power (d) is a resistance knob
  35. 35.What does a thermistor do? (a) boosts a small signal (b) senses how hot it is (c) senses how bright it is (d) glows using little power
  36. 36.🧩 Which component senses how hot it is? (a) transistor (b) LED (c) LDR (d) thermistor
  37. 37.True or false: a potentiometer turns a fan or wheels. (a) True (b) False
  38. 38.🧩 Which component senses how bright it is? (a) capacitor (b) potentiometer (c) LDR (d) motor
  39. 39.What does a buzzer do? (a) is a resistance knob (b) glows using little power (c) makes a beeping sound (d) limits the current
  40. 40.🧩 Which component beeps for an alarm? (a) buzzer (b) potentiometer (c) fuse (d) transistor

Answer key

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

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