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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 52 · 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.🧩 Which component stores a little charge? (a) thermistor (b) resistor (c) fuse (d) capacitor
  2. 2.What does a resistor do? (a) limits the current (b) beeps for an alarm (c) senses how hot it is (d) lets current go one way
  3. 3.True or false: a buzzer stores a little charge. (a) True (b) False
  4. 4.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a capacitor (c) a diode (d) a buzzer
  5. 5.What does a diode do? (a) lets current go one way (b) turns a fan or wheels (c) glows using little power (d) stores a little charge
  6. 6.🧩 Which component blows if current is high? (a) LDR (b) potentiometer (c) fuse (d) thermistor
  7. 7.True or false: a transistor boosts a small signal. (a) False (b) True
  8. 8.What does a potentiometer do? (a) boosts a small signal (b) is a resistance knob (c) stores a little charge (d) senses how hot it is
  9. 9.What does an LDR do? (a) senses how bright it is (b) stores a little charge (c) limits the current (d) turns a fan or wheels
  10. 10.What does a fuse do? (a) senses how hot it is (b) has coloured bands (c) blows if current is high (d) turns a fan or wheels
  11. 11.What does an LED do? (a) stores a little charge (b) is a resistance knob (c) glows using little power (d) makes things spin
  12. 12.True or false: a capacitor limits the current. (a) True (b) False
  13. 13.🧩 Which component limits the current? (a) capacitor (b) LED (c) resistor (d) thermistor
  14. 14.What does a buzzer do? (a) makes things spin (b) smooths a wobbly supply (c) beeps for an alarm (d) turns a fan or wheels
  15. 15.True or false: a thermistor makes a beeping sound. (a) True (b) False
  16. 16.🧩 Which component makes things spin? (a) motor (b) resistor (c) potentiometer (d) buzzer
  17. 17.What does a buzzer do? (a) has coloured bands (b) stores a little charge (c) smooths a wobbly supply (d) makes a beeping sound
  18. 18.What does a capacitor do? (a) smooths a wobbly supply (b) boosts a small signal (c) senses how hot it is (d) senses how bright it is
  19. 19.True or false: a resistor senses how hot it is. (a) True (b) False
  20. 20.🧩 Which component has coloured bands? (a) fuse (b) motor (c) LDR (d) resistor
  21. 21.What does a capacitor do? (a) stores a little charge (b) limits the current (c) makes a beeping sound (d) beeps for an alarm
  22. 22.🧩 A capacitor in a circuit can … (a) measure heat (b) spin a wheel (c) store charge briefly (d) make light
  23. 23.True or false: a diode stores a little charge. (a) False (b) True
  24. 24.🧩 Which component beeps for an alarm? (a) resistor (b) capacitor (c) buzzer (d) thermistor
  25. 25.What does a thermistor do? (a) senses how hot it is (b) beeps for an alarm (c) has coloured bands (d) senses how bright it is
  26. 26.🧩 Which component turns a fan or wheels? (a) motor (b) potentiometer (c) capacitor (d) resistor
  27. 27.🧩 Which component senses how hot it is? (a) thermistor (b) buzzer (c) potentiometer (d) LDR
  28. 28.What does a transistor do? (a) makes things spin (b) boosts a small signal (c) blows if current is high (d) beeps for an alarm
  29. 29.🧩 Which part changes electrical energy into movement? (a) a resistor (b) a motor (c) an LED (d) a fuse
  30. 30.🧩 Which component senses how bright it is? (a) diode (b) LDR (c) buzzer (d) transistor
  31. 31.True or false: a resistor smooths a wobbly supply. (a) True (b) False
  32. 32.True or false: a resistor limits the current. (a) False (b) True
  33. 33.True or false: a resistor makes things spin. (a) True (b) False
  34. 34.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
  35. 35.🧩 Which component boosts a small signal? (a) potentiometer (b) LED (c) transistor (d) motor
  36. 36.True or false: a fuse glows using little power. (a) False (b) True
  37. 37.True or false: a diode lets current go one way. (a) True (b) False
  38. 38.True or false: a fuse beeps for an alarm. (a) True (b) False
  39. 39.True or false: a capacitor blows if current is high. (a) False (b) True
  40. 40.True or false: an LED glows using little power. (a) False (b) True

Answer key

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

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