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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 203 · 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) thermistor (b) diode (c) potentiometer (d) buzzer
  2. 2.🧩 Which component lets current go one way? (a) potentiometer (b) buzzer (c) diode (d) transistor
  3. 3.🧩 Which part changes electrical energy into movement? (a) an LED (b) a resistor (c) a motor (d) a fuse
  4. 4.What does an LDR do? (a) glows using little power (b) senses how bright it is (c) smooths a wobbly supply (d) boosts a small signal
  5. 5.True or false: a diode has coloured bands. (a) True (b) False
  6. 6.🧩 A capacitor in a circuit can … (a) store charge briefly (b) make light (c) spin a wheel (d) measure heat
  7. 7.🧩 Which part changes electrical energy into sound? (a) a buzzer (b) a resistor (c) a diode (d) a capacitor
  8. 8.🧩 Which component smooths a wobbly supply? (a) capacitor (b) resistor (c) transistor (d) buzzer
  9. 9.What does a buzzer do? (a) senses how bright it is (b) has coloured bands (c) makes a beeping sound (d) blows if current is high
  10. 10.🧩 Which component beeps for an alarm? (a) buzzer (b) fuse (c) motor (d) thermistor
  11. 11.🧩 Which component has coloured bands? (a) transistor (b) resistor (c) buzzer (d) fuse
  12. 12.What does a fuse do? (a) boosts a small signal (b) blows if current is high (c) turns a fan or wheels (d) has coloured bands
  13. 13.True or false: a thermistor blows if current is high. (a) True (b) False
  14. 14.True or false: an LED glows using little power. (a) True (b) False
  15. 15.True or false: a resistor has coloured bands. (a) False (b) True
  16. 16.🧩 Which component makes a beeping sound? (a) diode (b) thermistor (c) fuse (d) buzzer
  17. 17.🧩 Which component makes things spin? (a) diode (b) motor (c) LED (d) resistor
  18. 18.True or false: a resistor limits the current. (a) False (b) True
  19. 19.True or false: a diode turns a fan or wheels. (a) True (b) False
  20. 20.True or false: a potentiometer stores a little charge. (a) False (b) True
  21. 21.True or false: an LED turns a fan or wheels. (a) True (b) False
  22. 22.What does a motor do? (a) has coloured bands (b) boosts a small signal (c) makes things spin (d) makes a beeping sound
  23. 23.What does a motor do? (a) limits the current (b) makes a beeping sound (c) smooths a wobbly supply (d) turns a fan or wheels
  24. 24.What does a thermistor do? (a) limits the current (b) senses how hot it is (c) stores a little charge (d) glows using little power
  25. 25.What does a capacitor do? (a) senses how bright it is (b) blows if current is high (c) stores a little charge (d) limits the current
  26. 26.🧩 Which component senses how bright it is? (a) transistor (b) motor (c) LDR (d) buzzer
  27. 27.True or false: an LDR smooths a wobbly supply. (a) False (b) True
  28. 28.What does a capacitor do? (a) makes a beeping sound (b) smooths a wobbly supply (c) blows if current is high (d) makes things spin
  29. 29.What does a resistor do? (a) lets current go one way (b) is a resistance knob (c) limits the current (d) turns a fan or wheels
  30. 30.🧩 Which component senses how hot it is? (a) thermistor (b) diode (c) LDR (d) fuse
  31. 31.🧩 Which component turns a fan or wheels? (a) transistor (b) capacitor (c) resistor (d) motor
  32. 32.True or false: a potentiometer is a resistance knob. (a) False (b) True
  33. 33.True or false: a potentiometer lets current go one way. (a) True (b) False
  34. 34.🧩 Which component boosts a small signal? (a) buzzer (b) motor (c) transistor (d) fuse
  35. 35.True or false: a thermistor senses how hot it is. (a) True (b) False
  36. 36.What does an LED do? (a) is a resistance knob (b) beeps for an alarm (c) glows using little power (d) makes a beeping sound
  37. 37.What does a resistor do? (a) lets current go one way (b) makes things spin (c) is a resistance knob (d) has coloured bands
  38. 38.🧩 Which component stores a little charge? (a) LDR (b) resistor (c) potentiometer (d) capacitor
  39. 39.🧩 Which component blows if current is high? (a) LDR (b) thermistor (c) fuse (d) motor
  40. 40.True or false: a transistor lets current go one way. (a) True (b) False

Answer key

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

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