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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 294 · 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 blows if current is high. (a) True (b) False
  2. 2.🧩 A capacitor in a circuit can … (a) make light (b) spin a wheel (c) measure heat (d) store charge briefly
  3. 3.🧩 Which part changes electrical energy into movement? (a) a resistor (b) a motor (c) a fuse (d) an LED
  4. 4.True or false: a thermistor senses how hot it is. (a) False (b) True
  5. 5.🧩 Which part changes electrical energy into sound? (a) a diode (b) a capacitor (c) a buzzer (d) a resistor
  6. 6.🧩 Which component boosts a small signal? (a) fuse (b) LED (c) transistor (d) capacitor
  7. 7.🧩 Which component senses how hot it is? (a) thermistor (b) motor (c) capacitor (d) buzzer
  8. 8.True or false: a diode blows if current is high. (a) False (b) True
  9. 9.🧩 Which component makes things spin? (a) motor (b) LED (c) potentiometer (d) resistor
  10. 10.What does a transistor do? (a) senses how bright it is (b) boosts a small signal (c) limits the current (d) blows if current is high
  11. 11.What does a resistor do? (a) senses how hot it is (b) beeps for an alarm (c) has coloured bands (d) smooths a wobbly supply
  12. 12.🧩 Which component limits the current? (a) diode (b) resistor (c) fuse (d) thermistor
  13. 13.What does an LED do? (a) stores a little charge (b) is a resistance knob (c) glows using little power (d) makes things spin
  14. 14.True or false: an LED stores a little charge. (a) False (b) True
  15. 15.What does a potentiometer do? (a) senses how bright it is (b) stores a little charge (c) is a resistance knob (d) lets current go one way
  16. 16.True or false: an LDR limits the current. (a) True (b) False
  17. 17.What does a thermistor do? (a) senses how hot it is (b) beeps for an alarm (c) has coloured bands (d) boosts a small signal
  18. 18.True or false: a motor lets current go one way. (a) True (b) False
  19. 19.True or false: an LDR senses how bright it is. (a) False (b) True
  20. 20.True or false: a resistor stores a little charge. (a) False (b) True
  21. 21.🧩 Which component smooths a wobbly supply? (a) resistor (b) capacitor (c) potentiometer (d) LED
  22. 22.What does an LDR do? (a) turns a fan or wheels (b) senses how hot it is (c) makes things spin (d) senses how bright it is
  23. 23.🧩 Which component turns a fan or wheels? (a) LDR (b) resistor (c) motor (d) thermistor
  24. 24.True or false: a capacitor blows if current is high. (a) False (b) True
  25. 25.True or false: an LED has coloured bands. (a) True (b) False
  26. 26.True or false: a diode has coloured bands. (a) False (b) True
  27. 27.True or false: a motor makes a beeping sound. (a) False (b) True
  28. 28.True or false: a buzzer glows using little power. (a) True (b) False
  29. 29.🧩 Which component stores a little charge? (a) resistor (b) thermistor (c) LED (d) capacitor
  30. 30.What does a buzzer do? (a) beeps for an alarm (b) boosts a small signal (c) makes things spin (d) blows if current is high
  31. 31.🧩 Which component makes a beeping sound? (a) LDR (b) transistor (c) buzzer (d) resistor
  32. 32.What does a fuse do? (a) has coloured bands (b) blows if current is high (c) limits the current (d) is a resistance knob
  33. 33.True or false: an LED lets current go one way. (a) True (b) False
  34. 34.What does a buzzer do? (a) limits the current (b) glows using little power (c) makes a beeping sound (d) has coloured bands
  35. 35.🧩 Which component glows using little power? (a) thermistor (b) motor (c) transistor (d) LED
  36. 36.What does a resistor do? (a) stores a little charge (b) limits the current (c) glows using little power (d) boosts a small signal
  37. 37.True or false: a fuse blows if current is high. (a) False (b) True
  38. 38.True or false: a transistor boosts a small signal. (a) False (b) True
  39. 39.What does a capacitor do? (a) senses how hot it is (b) beeps for an alarm (c) stores a little charge (d) is a resistance knob
  40. 40.What does a motor do? (a) stores a little charge (b) boosts a small signal (c) blows if current is high (d) turns a fan or wheels

Answer key

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

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