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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 448 · 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 motor senses how hot it is. (a) False (b) True
  2. 2.What does a motor do? (a) makes a beeping sound (b) stores a little charge (c) makes things spin (d) smooths a wobbly supply
  3. 3.What does a buzzer do? (a) blows if current is high (b) lets current go one way (c) turns a fan or wheels (d) beeps for an alarm
  4. 4.🧩 Which component beeps for an alarm? (a) LED (b) transistor (c) diode (d) buzzer
  5. 5.🧩 Which part changes electrical energy into sound? (a) a buzzer (b) a resistor (c) a diode (d) a capacitor
  6. 6.🧩 Which component turns a fan or wheels? (a) diode (b) motor (c) buzzer (d) LED
  7. 7.True or false: a fuse blows if current is high. (a) False (b) True
  8. 8.True or false: a motor turns a fan or wheels. (a) True (b) False
  9. 9.True or false: a thermistor stores a little charge. (a) False (b) True
  10. 10.What does a diode do? (a) lets current go one way (b) blows if current is high (c) is a resistance knob (d) boosts a small signal
  11. 11.What does a resistor do? (a) turns a fan or wheels (b) limits the current (c) glows using little power (d) stores a little charge
  12. 12.True or false: a resistor glows using little power. (a) False (b) True
  13. 13.What does a potentiometer do? (a) glows using little power (b) stores a little charge (c) lets current go one way (d) is a resistance knob
  14. 14.What does a fuse do? (a) blows if current is high (b) turns a fan or wheels (c) makes things spin (d) limits the current
  15. 15.🧩 A capacitor in a circuit can … (a) spin a wheel (b) make light (c) store charge briefly (d) measure heat
  16. 16.What does a thermistor do? (a) senses how hot it is (b) beeps for an alarm (c) blows if current is high (d) senses how bright it is
  17. 17.True or false: a buzzer makes things spin. (a) False (b) True
  18. 18.What does a motor do? (a) turns a fan or wheels (b) makes a beeping sound (c) limits the current (d) has coloured bands
  19. 19.🧩 Which component stores a little charge? (a) motor (b) capacitor (c) transistor (d) LED
  20. 20.🧩 Which component senses how bright it is? (a) motor (b) LDR (c) transistor (d) diode
  21. 21.What does a buzzer do? (a) turns a fan or wheels (b) makes things spin (c) makes a beeping sound (d) blows if current is high
  22. 22.🧩 Which component is a resistance knob? (a) thermistor (b) potentiometer (c) LDR (d) LED
  23. 23.What does a transistor do? (a) boosts a small signal (b) senses how hot it is (c) senses how bright it is (d) glows using little power
  24. 24.What does a capacitor do? (a) is a resistance knob (b) smooths a wobbly supply (c) beeps for an alarm (d) blows if current is high
  25. 25.🧩 Which component makes things spin? (a) LDR (b) diode (c) motor (d) thermistor
  26. 26.True or false: a buzzer beeps for an alarm. (a) True (b) False
  27. 27.What does a capacitor do? (a) makes a beeping sound (b) makes things spin (c) stores a little charge (d) boosts a small signal
  28. 28.True or false: a buzzer makes a beeping sound. (a) True (b) False
  29. 29.🧩 Which component glows using little power? (a) potentiometer (b) buzzer (c) LED (d) thermistor
  30. 30.True or false: a motor makes things spin. (a) False (b) True
  31. 31.🧩 Which part changes electrical energy into movement? (a) an LED (b) a fuse (c) a motor (d) a resistor
  32. 32.True or false: a transistor limits the current. (a) False (b) True
  33. 33.🧩 Which component smooths a wobbly supply? (a) motor (b) fuse (c) LED (d) capacitor
  34. 34.True or false: a diode lets current go one way. (a) True (b) False
  35. 35.True or false: a diode blows if current is high. (a) True (b) False
  36. 36.True or false: a capacitor senses how hot it is. (a) False (b) True
  37. 37.True or false: a potentiometer is a resistance knob. (a) True (b) False
  38. 38.🧩 Which component senses how hot it is? (a) potentiometer (b) transistor (c) thermistor (d) resistor
  39. 39.What does an LDR do? (a) senses how bright it is (b) beeps for an alarm (c) has coloured bands (d) limits the current
  40. 40.🧩 Which component blows if current is high? (a) buzzer (b) thermistor (c) LED (d) fuse

Answer key

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

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