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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 302 · 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 resistor makes a beeping sound. (a) False (b) True
  2. 2.What does a buzzer do? (a) boosts a small signal (b) lets current go one way (c) makes a beeping sound (d) glows using little power
  3. 3.What does a motor do? (a) blows if current is high (b) has coloured bands (c) glows using little power (d) makes things spin
  4. 4.True or false: an LED smooths a wobbly supply. (a) True (b) False
  5. 5.🧩 Which component makes things spin? (a) buzzer (b) LDR (c) LED (d) motor
  6. 6.🧩 Which part changes electrical energy into movement? (a) an LED (b) a resistor (c) a motor (d) a fuse
  7. 7.🧩 Which component is a resistance knob? (a) potentiometer (b) resistor (c) thermistor (d) buzzer
  8. 8.What does a fuse do? (a) stores a little charge (b) turns a fan or wheels (c) makes things spin (d) blows if current is high
  9. 9.What does a diode do? (a) glows using little power (b) limits the current (c) makes a beeping sound (d) lets current go one way
  10. 10.What does a resistor do? (a) beeps for an alarm (b) glows using little power (c) is a resistance knob (d) limits the current
  11. 11.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a buzzer (c) a resistor (d) a diode
  12. 12.🧩 Which component beeps for an alarm? (a) LED (b) buzzer (c) motor (d) transistor
  13. 13.🧩 Which component limits the current? (a) fuse (b) motor (c) resistor (d) thermistor
  14. 14.True or false: a motor makes things spin. (a) True (b) False
  15. 15.🧩 Which component senses how bright it is? (a) LDR (b) LED (c) motor (d) fuse
  16. 16.🧩 A capacitor in a circuit can … (a) measure heat (b) make light (c) spin a wheel (d) store charge briefly
  17. 17.What does a capacitor do? (a) senses how bright it is (b) makes a beeping sound (c) senses how hot it is (d) smooths a wobbly supply
  18. 18.True or false: a resistor has coloured bands. (a) True (b) False
  19. 19.🧩 Which component turns a fan or wheels? (a) motor (b) resistor (c) transistor (d) LDR
  20. 20.What does a thermistor do? (a) turns a fan or wheels (b) blows if current is high (c) senses how hot it is (d) makes things spin
  21. 21.True or false: a resistor limits the current. (a) True (b) False
  22. 22.🧩 Which component boosts a small signal? (a) LDR (b) fuse (c) transistor (d) potentiometer
  23. 23.True or false: an LDR is a resistance knob. (a) True (b) False
  24. 24.🧩 Which component stores a little charge? (a) capacitor (b) LED (c) resistor (d) buzzer
  25. 25.🧩 Which component makes a beeping sound? (a) diode (b) buzzer (c) fuse (d) LDR
  26. 26.🧩 Which component senses how hot it is? (a) transistor (b) LDR (c) thermistor (d) potentiometer
  27. 27.True or false: an LED limits the current. (a) False (b) True
  28. 28.🧩 Which component has coloured bands? (a) resistor (b) thermistor (c) motor (d) capacitor
  29. 29.True or false: an LED senses how hot it is. (a) True (b) False
  30. 30.True or false: a buzzer beeps for an alarm. (a) False (b) True
  31. 31.🧩 Which component lets current go one way? (a) capacitor (b) diode (c) fuse (d) resistor
  32. 32.What does an LED do? (a) has coloured bands (b) glows using little power (c) senses how bright it is (d) blows if current is high
  33. 33.True or false: a transistor limits the current. (a) True (b) False
  34. 34.True or false: a potentiometer is a resistance knob. (a) True (b) False
  35. 35.What does a potentiometer do? (a) makes a beeping sound (b) turns a fan or wheels (c) beeps for an alarm (d) is a resistance knob
  36. 36.True or false: a transistor smooths a wobbly supply. (a) True (b) False
  37. 37.🧩 Which component glows using little power? (a) LDR (b) fuse (c) capacitor (d) LED
  38. 38.What does an LDR do? (a) senses how bright it is (b) stores a little charge (c) limits the current (d) beeps for an alarm
  39. 39.True or false: a fuse has coloured bands. (a) True (b) False
  40. 40.True or false: a capacitor has coloured bands. (a) True (b) False

Answer key

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

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