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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 458 · 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 blows if current is high? (a) fuse (b) LDR (c) LED (d) potentiometer
  2. 2.🧩 A capacitor in a circuit can … (a) make light (b) spin a wheel (c) store charge briefly (d) measure heat
  3. 3.True or false: a thermistor beeps for an alarm. (a) False (b) True
  4. 4.True or false: a diode lets current go one way. (a) False (b) True
  5. 5.🧩 Which component turns a fan or wheels? (a) thermistor (b) motor (c) buzzer (d) transistor
  6. 6.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a buzzer (c) a resistor (d) a diode
  7. 7.What does an LED do? (a) lets current go one way (b) senses how bright it is (c) smooths a wobbly supply (d) glows using little power
  8. 8.What does a transistor do? (a) lets current go one way (b) makes things spin (c) senses how hot it is (d) boosts a small signal
  9. 9.🧩 Which component lets current go one way? (a) buzzer (b) diode (c) motor (d) LED
  10. 10.True or false: a potentiometer glows using little power. (a) False (b) True
  11. 11.True or false: a transistor boosts a small signal. (a) False (b) True
  12. 12.True or false: an LDR is a resistance knob. (a) True (b) False
  13. 13.What does a buzzer do? (a) beeps for an alarm (b) senses how hot it is (c) lets current go one way (d) has coloured bands
  14. 14.🧩 Which part changes electrical energy into movement? (a) an LED (b) a resistor (c) a motor (d) a fuse
  15. 15.What does a fuse do? (a) stores a little charge (b) smooths a wobbly supply (c) blows if current is high (d) turns a fan or wheels
  16. 16.True or false: an LED limits the current. (a) True (b) False
  17. 17.What does a resistor do? (a) senses how bright it is (b) boosts a small signal (c) limits the current (d) stores a little charge
  18. 18.True or false: an LDR smooths a wobbly supply. (a) False (b) True
  19. 19.What does a diode do? (a) is a resistance knob (b) senses how hot it is (c) makes a beeping sound (d) lets current go one way
  20. 20.🧩 Which component stores a little charge? (a) capacitor (b) LED (c) LDR (d) potentiometer
  21. 21.True or false: an LED stores a little charge. (a) True (b) False
  22. 22.True or false: a resistor limits the current. (a) True (b) False
  23. 23.What does a potentiometer do? (a) is a resistance knob (b) has coloured bands (c) turns a fan or wheels (d) blows if current is high
  24. 24.True or false: a fuse blows if current is high. (a) False (b) True
  25. 25.🧩 Which component senses how bright it is? (a) resistor (b) buzzer (c) LDR (d) capacitor
  26. 26.🧩 Which component smooths a wobbly supply? (a) transistor (b) diode (c) capacitor (d) fuse
  27. 27.True or false: a resistor glows using little power. (a) True (b) False
  28. 28.True or false: an LED glows using little power. (a) False (b) True
  29. 29.🧩 Which component beeps for an alarm? (a) resistor (b) buzzer (c) thermistor (d) fuse
  30. 30.What does a motor do? (a) has coloured bands (b) makes things spin (c) smooths a wobbly supply (d) beeps for an alarm
  31. 31.What does a capacitor do? (a) senses how bright it is (b) has coloured bands (c) beeps for an alarm (d) smooths a wobbly supply
  32. 32.True or false: a capacitor senses how bright it is. (a) True (b) False
  33. 33.What does a buzzer do? (a) boosts a small signal (b) stores a little charge (c) blows if current is high (d) makes a beeping sound
  34. 34.What does an LDR do? (a) glows using little power (b) beeps for an alarm (c) stores a little charge (d) senses how bright it is
  35. 35.True or false: an LDR senses how bright it is. (a) True (b) False
  36. 36.True or false: a capacitor stores a little charge. (a) True (b) False
  37. 37.True or false: a buzzer makes a beeping sound. (a) False (b) True
  38. 38.What does a motor do? (a) turns a fan or wheels (b) makes a beeping sound (c) boosts a small signal (d) is a resistance knob
  39. 39.True or false: a thermistor blows if current is high. (a) False (b) True
  40. 40.🧩 Which component makes things spin? (a) LED (b) motor (c) capacitor (d) resistor

Answer key

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

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