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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 86 · 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.🧩 A capacitor in a circuit can … (a) spin a wheel (b) measure heat (c) make light (d) store charge briefly
  2. 2.What does a transistor do? (a) beeps for an alarm (b) stores a little charge (c) senses how bright it is (d) boosts a small signal
  3. 3.🧩 Which component boosts a small signal? (a) transistor (b) fuse (c) buzzer (d) capacitor
  4. 4.True or false: a diode has coloured bands. (a) True (b) False
  5. 5.🧩 Which component makes a beeping sound? (a) buzzer (b) LDR (c) resistor (d) capacitor
  6. 6.What does a resistor do? (a) beeps for an alarm (b) senses how bright it is (c) has coloured bands (d) makes a beeping sound
  7. 7.What does an LED do? (a) makes a beeping sound (b) boosts a small signal (c) glows using little power (d) blows if current is high
  8. 8.True or false: a buzzer boosts a small signal. (a) False (b) True
  9. 9.🧩 Which component is a resistance knob? (a) fuse (b) diode (c) LED (d) potentiometer
  10. 10.🧩 Which component stores a little charge? (a) thermistor (b) motor (c) resistor (d) capacitor
  11. 11.True or false: a fuse blows if current is high. (a) True (b) False
  12. 12.🧩 Which component senses how bright it is? (a) capacitor (b) diode (c) LDR (d) thermistor
  13. 13.🧩 Which component makes things spin? (a) transistor (b) diode (c) motor (d) fuse
  14. 14.🧩 Which part changes electrical energy into movement? (a) an LED (b) a motor (c) a resistor (d) a fuse
  15. 15.What does a diode do? (a) beeps for an alarm (b) is a resistance knob (c) lets current go one way (d) glows using little power
  16. 16.🧩 Which component senses how hot it is? (a) thermistor (b) buzzer (c) LED (d) motor
  17. 17.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a resistor (c) a buzzer (d) a diode
  18. 18.True or false: a resistor has coloured bands. (a) False (b) True
  19. 19.True or false: a capacitor glows using little power. (a) False (b) True
  20. 20.🧩 Which component glows using little power? (a) LED (b) transistor (c) capacitor (d) motor
  21. 21.True or false: a motor makes things spin. (a) True (b) False
  22. 22.What does an LDR do? (a) blows if current is high (b) boosts a small signal (c) senses how bright it is (d) has coloured bands
  23. 23.True or false: an LED stores a little charge. (a) True (b) False
  24. 24.True or false: an LDR senses how bright it is. (a) True (b) False
  25. 25.True or false: a transistor boosts a small signal. (a) True (b) False
  26. 26.True or false: a thermistor limits the current. (a) True (b) False
  27. 27.True or false: an LED glows using little power. (a) True (b) False
  28. 28.True or false: a buzzer beeps for an alarm. (a) False (b) True
  29. 29.What does a buzzer do? (a) makes a beeping sound (b) glows using little power (c) turns a fan or wheels (d) stores a little charge
  30. 30.True or false: a transistor glows using little power. (a) True (b) False
  31. 31.True or false: a capacitor senses how bright it is. (a) False (b) True
  32. 32.🧩 Which component limits the current? (a) LDR (b) resistor (c) potentiometer (d) buzzer
  33. 33.🧩 Which component has coloured bands? (a) capacitor (b) fuse (c) resistor (d) transistor
  34. 34.🧩 Which component blows if current is high? (a) transistor (b) diode (c) LDR (d) fuse
  35. 35.True or false: a capacitor stores a little charge. (a) False (b) True
  36. 36.What does a fuse do? (a) stores a little charge (b) glows using little power (c) makes things spin (d) blows if current is high
  37. 37.True or false: a resistor senses how bright it is. (a) True (b) False
  38. 38.🧩 Which component lets current go one way? (a) diode (b) potentiometer (c) capacitor (d) LDR
  39. 39.True or false: a resistor beeps for an alarm. (a) True (b) False
  40. 40.True or false: a resistor senses how hot it is. (a) True (b) False

Answer key

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

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