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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 348 · 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 boosts a small signal? (a) thermistor (b) transistor (c) LDR (d) potentiometer
  2. 2.🧩 Which component blows if current is high? (a) resistor (b) fuse (c) diode (d) LED
  3. 3.🧩 Which component has coloured bands? (a) motor (b) LDR (c) resistor (d) fuse
  4. 4.What does a buzzer do? (a) makes a beeping sound (b) turns a fan or wheels (c) makes things spin (d) is a resistance knob
  5. 5.🧩 Which component senses how bright it is? (a) motor (b) LDR (c) thermistor (d) potentiometer
  6. 6.🧩 Which part changes electrical energy into movement? (a) a motor (b) a fuse (c) a resistor (d) an LED
  7. 7.🧩 A capacitor in a circuit can … (a) make light (b) measure heat (c) spin a wheel (d) store charge briefly
  8. 8.True or false: a potentiometer blows if current is high. (a) True (b) False
  9. 9.What does an LED do? (a) smooths a wobbly supply (b) makes a beeping sound (c) glows using little power (d) stores a little charge
  10. 10.True or false: an LED glows using little power. (a) False (b) True
  11. 11.True or false: an LED makes a beeping sound. (a) False (b) True
  12. 12.True or false: a buzzer stores a little charge. (a) False (b) True
  13. 13.True or false: a buzzer smooths a wobbly supply. (a) True (b) False
  14. 14.🧩 Which component senses how hot it is? (a) buzzer (b) thermistor (c) resistor (d) capacitor
  15. 15.True or false: a capacitor limits the current. (a) True (b) False
  16. 16.🧩 Which component smooths a wobbly supply? (a) transistor (b) diode (c) buzzer (d) capacitor
  17. 17.True or false: a potentiometer is a resistance knob. (a) False (b) True
  18. 18.🧩 Which component stores a little charge? (a) resistor (b) diode (c) capacitor (d) LDR
  19. 19.What does a thermistor do? (a) makes things spin (b) senses how hot it is (c) smooths a wobbly supply (d) is a resistance knob
  20. 20.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a diode (c) a buzzer (d) a resistor
  21. 21.🧩 Which component turns a fan or wheels? (a) LDR (b) potentiometer (c) resistor (d) motor
  22. 22.True or false: a motor makes things spin. (a) False (b) True
  23. 23.🧩 Which component makes a beeping sound? (a) LDR (b) capacitor (c) buzzer (d) LED
  24. 24.What does a motor do? (a) has coloured bands (b) makes things spin (c) glows using little power (d) makes a beeping sound
  25. 25.True or false: a motor limits the current. (a) False (b) True
  26. 26.🧩 Which component limits the current? (a) potentiometer (b) thermistor (c) resistor (d) buzzer
  27. 27.What does a diode do? (a) lets current go one way (b) boosts a small signal (c) is a resistance knob (d) makes a beeping sound
  28. 28.🧩 Which component makes things spin? (a) motor (b) potentiometer (c) thermistor (d) fuse
  29. 29.What does a potentiometer do? (a) turns a fan or wheels (b) senses how hot it is (c) is a resistance knob (d) makes a beeping sound
  30. 30.🧩 Which component glows using little power? (a) buzzer (b) LED (c) diode (d) fuse
  31. 31.True or false: a fuse smooths a wobbly supply. (a) False (b) True
  32. 32.True or false: an LED senses how bright it is. (a) True (b) False
  33. 33.True or false: a resistor limits the current. (a) False (b) True
  34. 34.🧩 Which component lets current go one way? (a) diode (b) motor (c) transistor (d) resistor
  35. 35.True or false: a resistor beeps for an alarm. (a) False (b) True
  36. 36.What does an LDR do? (a) senses how hot it is (b) senses how bright it is (c) stores a little charge (d) beeps for an alarm
  37. 37.True or false: a capacitor beeps for an alarm. (a) True (b) False
  38. 38.True or false: a diode lets current go one way. (a) True (b) False
  39. 39.True or false: a thermistor senses how hot it is. (a) True (b) False
  40. 40.🧩 Which component is a resistance knob? (a) capacitor (b) diode (c) potentiometer (d) resistor

Answer key

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

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