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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 391 · 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 capacitor blows if current is high. (a) False (b) True
  2. 2.🧩 Which part changes electrical energy into movement? (a) a resistor (b) a motor (c) a fuse (d) an LED
  3. 3.🧩 A capacitor in a circuit can … (a) measure heat (b) store charge briefly (c) make light (d) spin a wheel
  4. 4.🧩 Which component smooths a wobbly supply? (a) potentiometer (b) buzzer (c) capacitor (d) thermistor
  5. 5.🧩 Which component blows if current is high? (a) capacitor (b) resistor (c) LDR (d) fuse
  6. 6.What does a motor do? (a) limits the current (b) is a resistance knob (c) boosts a small signal (d) makes things spin
  7. 7.What does a capacitor do? (a) senses how hot it is (b) smooths a wobbly supply (c) limits the current (d) lets current go one way
  8. 8.🧩 Which component senses how bright it is? (a) fuse (b) LED (c) motor (d) LDR
  9. 9.🧩 Which part changes electrical energy into sound? (a) a buzzer (b) a capacitor (c) a resistor (d) a diode
  10. 10.True or false: a buzzer beeps for an alarm. (a) False (b) True
  11. 11.What does a thermistor do? (a) smooths a wobbly supply (b) makes a beeping sound (c) limits the current (d) senses how hot it is
  12. 12.True or false: an LED glows using little power. (a) True (b) False
  13. 13.True or false: a fuse limits the current. (a) False (b) True
  14. 14.What does a fuse do? (a) makes things spin (b) makes a beeping sound (c) blows if current is high (d) limits the current
  15. 15.🧩 Which component is a resistance knob? (a) LDR (b) LED (c) diode (d) potentiometer
  16. 16.True or false: a capacitor smooths a wobbly supply. (a) True (b) False
  17. 17.True or false: a motor has coloured bands. (a) True (b) False
  18. 18.True or false: a resistor glows using little power. (a) True (b) False
  19. 19.🧩 Which component boosts a small signal? (a) thermistor (b) capacitor (c) transistor (d) buzzer
  20. 20.🧩 Which component glows using little power? (a) diode (b) LED (c) transistor (d) capacitor
  21. 21.What does a diode do? (a) is a resistance knob (b) beeps for an alarm (c) lets current go one way (d) has coloured bands
  22. 22.True or false: a capacitor glows using little power. (a) False (b) True
  23. 23.What does a potentiometer do? (a) blows if current is high (b) is a resistance knob (c) makes things spin (d) glows using little power
  24. 24.What does a capacitor do? (a) senses how bright it is (b) is a resistance knob (c) stores a little charge (d) glows using little power
  25. 25.🧩 Which component makes a beeping sound? (a) buzzer (b) diode (c) capacitor (d) fuse
  26. 26.🧩 Which component turns a fan or wheels? (a) fuse (b) LDR (c) motor (d) diode
  27. 27.🧩 Which component limits the current? (a) thermistor (b) LDR (c) capacitor (d) resistor
  28. 28.What does an LDR do? (a) senses how hot it is (b) stores a little charge (c) turns a fan or wheels (d) senses how bright it is
  29. 29.🧩 Which component makes things spin? (a) resistor (b) capacitor (c) motor (d) transistor
  30. 30.What does a transistor do? (a) boosts a small signal (b) has coloured bands (c) is a resistance knob (d) senses how hot it is
  31. 31.True or false: an LED smooths a wobbly supply. (a) False (b) True
  32. 32.What does an LED do? (a) senses how bright it is (b) makes a beeping sound (c) glows using little power (d) senses how hot it is
  33. 33.True or false: a resistor has coloured bands. (a) True (b) False
  34. 34.True or false: a fuse blows if current is high. (a) False (b) True
  35. 35.What does a buzzer do? (a) turns a fan or wheels (b) makes things spin (c) makes a beeping sound (d) glows using little power
  36. 36.True or false: a diode lets current go one way. (a) True (b) False
  37. 37.🧩 Which component senses how hot it is? (a) LDR (b) thermistor (c) potentiometer (d) transistor
  38. 38.🧩 Which component beeps for an alarm? (a) fuse (b) LDR (c) buzzer (d) thermistor
  39. 39.True or false: a motor turns a fan or wheels. (a) False (b) True
  40. 40.True or false: a buzzer makes a beeping sound. (a) True (b) False

Answer key

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

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