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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 178 · 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 part changes electrical energy into sound? (a) a buzzer (b) a diode (c) a resistor (d) a capacitor
  2. 2.True or false: a potentiometer smooths a wobbly supply. (a) False (b) True
  3. 3.🧩 Which component senses how hot it is? (a) resistor (b) fuse (c) LED (d) thermistor
  4. 4.🧩 Which part changes electrical energy into movement? (a) an LED (b) a fuse (c) a motor (d) a resistor
  5. 5.True or false: a diode glows using little power. (a) False (b) True
  6. 6.🧩 A capacitor in a circuit can … (a) store charge briefly (b) make light (c) spin a wheel (d) measure heat
  7. 7.What does a potentiometer do? (a) has coloured bands (b) limits the current (c) is a resistance knob (d) stores a little charge
  8. 8.True or false: a capacitor smooths a wobbly supply. (a) True (b) False
  9. 9.🧩 Which component limits the current? (a) capacitor (b) thermistor (c) resistor (d) diode
  10. 10.True or false: a fuse smooths a wobbly supply. (a) False (b) True
  11. 11.🧩 Which component glows using little power? (a) transistor (b) potentiometer (c) motor (d) LED
  12. 12.What does an LDR do? (a) smooths a wobbly supply (b) is a resistance knob (c) senses how hot it is (d) senses how bright it is
  13. 13.True or false: a motor glows using little power. (a) True (b) False
  14. 14.What does a thermistor do? (a) senses how hot it is (b) makes things spin (c) has coloured bands (d) boosts a small signal
  15. 15.True or false: a capacitor has coloured bands. (a) False (b) True
  16. 16.True or false: a diode smooths a wobbly supply. (a) False (b) True
  17. 17.True or false: a resistor limits the current. (a) False (b) True
  18. 18.True or false: a potentiometer stores a little charge. (a) True (b) False
  19. 19.🧩 Which component stores a little charge? (a) LED (b) transistor (c) diode (d) capacitor
  20. 20.🧩 Which component has coloured bands? (a) buzzer (b) diode (c) resistor (d) motor
  21. 21.🧩 Which component is a resistance knob? (a) transistor (b) LED (c) potentiometer (d) capacitor
  22. 22.True or false: a transistor senses how hot it is. (a) True (b) False
  23. 23.What does a fuse do? (a) makes things spin (b) has coloured bands (c) senses how bright it is (d) blows if current is high
  24. 24.True or false: an LDR limits the current. (a) True (b) False
  25. 25.True or false: a buzzer blows if current is high. (a) True (b) False
  26. 26.True or false: a buzzer makes a beeping sound. (a) False (b) True
  27. 27.What does a capacitor do? (a) lets current go one way (b) stores a little charge (c) turns a fan or wheels (d) beeps for an alarm
  28. 28.What does a buzzer do? (a) has coloured bands (b) blows if current is high (c) makes a beeping sound (d) boosts a small signal
  29. 29.What does a transistor do? (a) has coloured bands (b) stores a little charge (c) beeps for an alarm (d) boosts a small signal
  30. 30.What does a motor do? (a) is a resistance knob (b) senses how hot it is (c) makes things spin (d) limits the current
  31. 31.True or false: a buzzer beeps for an alarm. (a) True (b) False
  32. 32.True or false: a transistor senses how bright it is. (a) True (b) False
  33. 33.🧩 Which component senses how bright it is? (a) fuse (b) LDR (c) diode (d) buzzer
  34. 34.True or false: a diode blows if current is high. (a) False (b) True
  35. 35.🧩 Which component turns a fan or wheels? (a) LED (b) motor (c) transistor (d) buzzer
  36. 36.🧩 Which component lets current go one way? (a) capacitor (b) buzzer (c) potentiometer (d) diode
  37. 37.True or false: a capacitor stores a little charge. (a) True (b) False
  38. 38.What does an LED do? (a) makes things spin (b) blows if current is high (c) beeps for an alarm (d) glows using little power
  39. 39.🧩 Which component beeps for an alarm? (a) LDR (b) fuse (c) thermistor (d) buzzer
  40. 40.🧩 Which component makes a beeping sound? (a) capacitor (b) buzzer (c) LDR (d) motor

Answer key

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

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