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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 668 · 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 turns a fan or wheels? (a) potentiometer (b) motor (c) buzzer (d) capacitor
  2. 2.What does a resistor do? (a) lets current go one way (b) has coloured bands (c) senses how bright it is (d) boosts a small signal
  3. 3.True or false: a potentiometer has coloured bands. (a) False (b) True
  4. 4.True or false: a buzzer makes a beeping sound. (a) True (b) False
  5. 5.What does an LED do? (a) turns a fan or wheels (b) stores a little charge (c) beeps for an alarm (d) glows using little power
  6. 6.What does a potentiometer do? (a) senses how bright it is (b) makes things spin (c) senses how hot it is (d) is a resistance knob
  7. 7.True or false: an LDR senses how bright it is. (a) True (b) False
  8. 8.True or false: an LED beeps for an alarm. (a) True (b) False
  9. 9.🧩 Which component glows using little power? (a) resistor (b) fuse (c) LED (d) motor
  10. 10.🧩 Which component is a resistance knob? (a) potentiometer (b) LED (c) resistor (d) fuse
  11. 11.True or false: a resistor beeps for an alarm. (a) False (b) True
  12. 12.🧩 Which component limits the current? (a) capacitor (b) diode (c) fuse (d) resistor
  13. 13.True or false: a capacitor has coloured bands. (a) True (b) False
  14. 14.True or false: a capacitor glows using little power. (a) False (b) True
  15. 15.What does a transistor do? (a) stores a little charge (b) has coloured bands (c) boosts a small signal (d) beeps for an alarm
  16. 16.True or false: an LDR lets current go one way. (a) True (b) False
  17. 17.What does an LDR do? (a) smooths a wobbly supply (b) is a resistance knob (c) senses how bright it is (d) senses how hot it is
  18. 18.True or false: a capacitor lets current go one way. (a) True (b) False
  19. 19.🧩 A capacitor in a circuit can … (a) store charge briefly (b) spin a wheel (c) make light (d) measure heat
  20. 20.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a resistor (c) a buzzer (d) a diode
  21. 21.What does a buzzer do? (a) blows if current is high (b) is a resistance knob (c) has coloured bands (d) makes a beeping sound
  22. 22.🧩 Which component boosts a small signal? (a) thermistor (b) transistor (c) fuse (d) LDR
  23. 23.What does a capacitor do? (a) has coloured bands (b) limits the current (c) smooths a wobbly supply (d) is a resistance knob
  24. 24.True or false: a potentiometer is a resistance knob. (a) True (b) False
  25. 25.True or false: a thermistor has coloured bands. (a) True (b) False
  26. 26.🧩 Which part changes electrical energy into movement? (a) a motor (b) an LED (c) a resistor (d) a fuse
  27. 27.🧩 Which component makes things spin? (a) LDR (b) buzzer (c) motor (d) thermistor
  28. 28.True or false: an LDR makes things spin. (a) False (b) True
  29. 29.🧩 Which component makes a beeping sound? (a) diode (b) transistor (c) LED (d) buzzer
  30. 30.🧩 Which component smooths a wobbly supply? (a) transistor (b) buzzer (c) capacitor (d) thermistor
  31. 31.🧩 Which component has coloured bands? (a) transistor (b) potentiometer (c) resistor (d) thermistor
  32. 32.What does a thermistor do? (a) senses how hot it is (b) boosts a small signal (c) has coloured bands (d) glows using little power
  33. 33.🧩 Which component blows if current is high? (a) LDR (b) resistor (c) LED (d) fuse
  34. 34.🧩 Which component senses how hot it is? (a) resistor (b) LDR (c) LED (d) thermistor
  35. 35.What does a fuse do? (a) boosts a small signal (b) blows if current is high (c) smooths a wobbly supply (d) lets current go one way
  36. 36.True or false: a transistor boosts a small signal. (a) False (b) True
  37. 37.True or false: a capacitor stores a little charge. (a) True (b) False
  38. 38.🧩 Which component lets current go one way? (a) fuse (b) thermistor (c) buzzer (d) diode
  39. 39.🧩 Which component beeps for an alarm? (a) buzzer (b) fuse (c) capacitor (d) transistor
  40. 40.True or false: a thermistor blows if current is high. (a) False (b) True

Answer key

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

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