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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 72 · 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.What does a capacitor do? (a) stores a little charge (b) is a resistance knob (c) makes things spin (d) limits the current
  2. 2.What does a resistor do? (a) boosts a small signal (b) senses how bright it is (c) is a resistance knob (d) limits the current
  3. 3.🧩 Which component is a resistance knob? (a) capacitor (b) motor (c) thermistor (d) potentiometer
  4. 4.What does a transistor do? (a) has coloured bands (b) boosts a small signal (c) senses how bright it is (d) makes a beeping sound
  5. 5.What does an LDR do? (a) senses how hot it is (b) is a resistance knob (c) senses how bright it is (d) blows if current is high
  6. 6.True or false: a resistor senses how hot it is. (a) False (b) True
  7. 7.What does a fuse do? (a) stores a little charge (b) senses how bright it is (c) blows if current is high (d) has coloured bands
  8. 8.🧩 Which component smooths a wobbly supply? (a) motor (b) capacitor (c) LED (d) fuse
  9. 9.🧩 Which component makes things spin? (a) potentiometer (b) motor (c) diode (d) resistor
  10. 10.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a buzzer (c) a diode (d) a resistor
  11. 11.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
  12. 12.True or false: a resistor has coloured bands. (a) False (b) True
  13. 13.What does a potentiometer do? (a) is a resistance knob (b) has coloured bands (c) makes a beeping sound (d) senses how hot it is
  14. 14.🧩 A capacitor in a circuit can … (a) make light (b) spin a wheel (c) measure heat (d) store charge briefly
  15. 15.What does a buzzer do? (a) blows if current is high (b) smooths a wobbly supply (c) makes a beeping sound (d) senses how hot it is
  16. 16.🧩 Which component boosts a small signal? (a) transistor (b) LED (c) capacitor (d) buzzer
  17. 17.What does a buzzer do? (a) limits the current (b) beeps for an alarm (c) glows using little power (d) boosts a small signal
  18. 18.True or false: a resistor limits the current. (a) False (b) True
  19. 19.🧩 Which component beeps for an alarm? (a) LED (b) buzzer (c) diode (d) LDR
  20. 20.True or false: an LDR senses how bright it is. (a) False (b) True
  21. 21.True or false: an LED glows using little power. (a) True (b) False
  22. 22.🧩 Which component turns a fan or wheels? (a) buzzer (b) transistor (c) motor (d) potentiometer
  23. 23.🧩 Which component blows if current is high? (a) buzzer (b) fuse (c) motor (d) LED
  24. 24.🧩 Which component senses how hot it is? (a) potentiometer (b) thermistor (c) transistor (d) motor
  25. 25.🧩 Which component limits the current? (a) LDR (b) thermistor (c) buzzer (d) resistor
  26. 26.🧩 Which component stores a little charge? (a) fuse (b) transistor (c) capacitor (d) motor
  27. 27.🧩 Which part changes electrical energy into movement? (a) an LED (b) a fuse (c) a resistor (d) a motor
  28. 28.True or false: a resistor beeps for an alarm. (a) False (b) True
  29. 29.What does a thermistor do? (a) lets current go one way (b) senses how hot it is (c) stores a little charge (d) is a resistance knob
  30. 30.True or false: a motor makes things spin. (a) False (b) True
  31. 31.True or false: a capacitor blows if current is high. (a) False (b) True
  32. 32.True or false: a motor turns a fan or wheels. (a) False (b) True
  33. 33.True or false: a buzzer beeps for an alarm. (a) False (b) True
  34. 34.🧩 Which component glows using little power? (a) LED (b) LDR (c) buzzer (d) capacitor
  35. 35.What does a motor do? (a) boosts a small signal (b) smooths a wobbly supply (c) is a resistance knob (d) makes things spin
  36. 36.True or false: a thermistor makes a beeping sound. (a) True (b) False
  37. 37.True or false: an LED smooths a wobbly supply. (a) False (b) True
  38. 38.True or false: a buzzer limits the current. (a) False (b) True
  39. 39.True or false: a thermistor senses how hot it is. (a) True (b) False
  40. 40.True or false: a transistor boosts a small signal. (a) True (b) False

Answer key

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

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