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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 465 · 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 fuse blows if current is high. (a) True (b) False
  2. 2.What does a capacitor do? (a) senses how hot it is (b) lets current go one way (c) boosts a small signal (d) stores a little charge
  3. 3.🧩 A capacitor in a circuit can … (a) make light (b) spin a wheel (c) measure heat (d) store charge briefly
  4. 4.What does a fuse do? (a) smooths a wobbly supply (b) blows if current is high (c) turns a fan or wheels (d) stores a little charge
  5. 5.What does a potentiometer do? (a) stores a little charge (b) limits the current (c) glows using little power (d) is a resistance knob
  6. 6.True or false: a transistor boosts a small signal. (a) False (b) True
  7. 7.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a capacitor (c) a buzzer (d) a diode
  8. 8.True or false: a transistor senses how hot it is. (a) False (b) True
  9. 9.🧩 Which component senses how hot it is? (a) capacitor (b) LED (c) thermistor (d) transistor
  10. 10.True or false: an LDR makes a beeping sound. (a) True (b) False
  11. 11.True or false: a resistor limits the current. (a) True (b) False
  12. 12.True or false: an LDR is a resistance knob. (a) True (b) False
  13. 13.True or false: a motor makes things spin. (a) True (b) False
  14. 14.What does a transistor do? (a) beeps for an alarm (b) stores a little charge (c) boosts a small signal (d) turns a fan or wheels
  15. 15.True or false: a buzzer lets current go one way. (a) True (b) False
  16. 16.🧩 Which part changes electrical energy into movement? (a) a motor (b) an LED (c) a resistor (d) a fuse
  17. 17.🧩 Which component is a resistance knob? (a) potentiometer (b) diode (c) capacitor (d) transistor
  18. 18.🧩 Which component smooths a wobbly supply? (a) diode (b) buzzer (c) capacitor (d) motor
  19. 19.What does a motor do? (a) glows using little power (b) makes a beeping sound (c) makes things spin (d) beeps for an alarm
  20. 20.🧩 Which component turns a fan or wheels? (a) resistor (b) fuse (c) motor (d) potentiometer
  21. 21.🧩 Which component makes a beeping sound? (a) resistor (b) fuse (c) potentiometer (d) buzzer
  22. 22.🧩 Which component beeps for an alarm? (a) transistor (b) buzzer (c) motor (d) resistor
  23. 23.🧩 Which component stores a little charge? (a) potentiometer (b) fuse (c) buzzer (d) capacitor
  24. 24.True or false: a buzzer blows if current is high. (a) False (b) True
  25. 25.True or false: a transistor senses how bright it is. (a) False (b) True
  26. 26.What does an LED do? (a) stores a little charge (b) makes a beeping sound (c) glows using little power (d) senses how hot it is
  27. 27.True or false: a buzzer beeps for an alarm. (a) True (b) False
  28. 28.🧩 Which component lets current go one way? (a) capacitor (b) LDR (c) transistor (d) diode
  29. 29.What does a thermistor do? (a) senses how hot it is (b) is a resistance knob (c) blows if current is high (d) senses how bright it is
  30. 30.True or false: a potentiometer is a resistance knob. (a) True (b) False
  31. 31.True or false: a resistor smooths a wobbly supply. (a) True (b) False
  32. 32.True or false: an LDR senses how bright it is. (a) False (b) True
  33. 33.What does an LDR do? (a) makes things spin (b) limits the current (c) senses how bright it is (d) boosts a small signal
  34. 34.🧩 Which component makes things spin? (a) capacitor (b) motor (c) potentiometer (d) transistor
  35. 35.🧩 Which component blows if current is high? (a) LED (b) fuse (c) LDR (d) resistor
  36. 36.True or false: a buzzer boosts a small signal. (a) True (b) False
  37. 37.True or false: a thermistor makes things spin. (a) False (b) True
  38. 38.True or false: a diode lets current go one way. (a) False (b) True
  39. 39.True or false: a transistor lets current go one way. (a) False (b) True
  40. 40.True or false: an LED boosts a small signal. (a) True (b) False

Answer key

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

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