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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 520 · 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 beeps for an alarm? (a) buzzer (b) thermistor (c) motor (d) LED
  2. 2.True or false: an LDR limits the current. (a) True (b) False
  3. 3.🧩 Which part changes electrical energy into movement? (a) an LED (b) a fuse (c) a resistor (d) a motor
  4. 4.🧩 Which component makes a beeping sound? (a) buzzer (b) thermistor (c) LED (d) capacitor
  5. 5.🧩 A capacitor in a circuit can … (a) make light (b) store charge briefly (c) spin a wheel (d) measure heat
  6. 6.True or false: a motor makes things spin. (a) False (b) True
  7. 7.What does an LED do? (a) blows if current is high (b) makes a beeping sound (c) has coloured bands (d) glows using little power
  8. 8.What does a thermistor do? (a) makes a beeping sound (b) senses how hot it is (c) has coloured bands (d) senses how bright it is
  9. 9.What does a capacitor do? (a) is a resistance knob (b) turns a fan or wheels (c) glows using little power (d) stores a little charge
  10. 10.What does a fuse do? (a) limits the current (b) blows if current is high (c) beeps for an alarm (d) smooths a wobbly supply
  11. 11.🧩 Which part changes electrical energy into sound? (a) a buzzer (b) a capacitor (c) a resistor (d) a diode
  12. 12.True or false: a motor makes a beeping sound. (a) False (b) True
  13. 13.True or false: a diode lets current go one way. (a) False (b) True
  14. 14.What does a buzzer do? (a) has coloured bands (b) beeps for an alarm (c) blows if current is high (d) smooths a wobbly supply
  15. 15.True or false: a resistor limits the current. (a) True (b) False
  16. 16.🧩 Which component senses how hot it is? (a) thermistor (b) fuse (c) LED (d) transistor
  17. 17.True or false: a motor boosts a small signal. (a) True (b) False
  18. 18.True or false: a capacitor stores a little charge. (a) False (b) True
  19. 19.🧩 Which component blows if current is high? (a) fuse (b) thermistor (c) potentiometer (d) LDR
  20. 20.🧩 Which component limits the current? (a) LDR (b) diode (c) buzzer (d) resistor
  21. 21.🧩 Which component turns a fan or wheels? (a) motor (b) fuse (c) thermistor (d) buzzer
  22. 22.True or false: a transistor limits the current. (a) False (b) True
  23. 23.What does a capacitor do? (a) blows if current is high (b) smooths a wobbly supply (c) senses how hot it is (d) turns a fan or wheels
  24. 24.True or false: a transistor boosts a small signal. (a) False (b) True
  25. 25.What does a potentiometer do? (a) turns a fan or wheels (b) makes things spin (c) is a resistance knob (d) senses how bright it is
  26. 26.True or false: a fuse blows if current is high. (a) True (b) False
  27. 27.What does a buzzer do? (a) lets current go one way (b) makes a beeping sound (c) turns a fan or wheels (d) has coloured bands
  28. 28.🧩 Which component has coloured bands? (a) LED (b) potentiometer (c) resistor (d) buzzer
  29. 29.True or false: a transistor stores a little charge. (a) True (b) False
  30. 30.True or false: an LED glows using little power. (a) False (b) True
  31. 31.True or false: a thermistor senses how hot it is. (a) False (b) True
  32. 32.🧩 Which component senses how bright it is? (a) buzzer (b) LDR (c) thermistor (d) fuse
  33. 33.True or false: an LED limits the current. (a) False (b) True
  34. 34.True or false: a motor senses how bright it is. (a) False (b) True
  35. 35.🧩 Which component makes things spin? (a) LDR (b) fuse (c) motor (d) buzzer
  36. 36.True or false: an LED has coloured bands. (a) False (b) True
  37. 37.True or false: a diode senses how hot it is. (a) True (b) False
  38. 38.True or false: a thermistor blows if current is high. (a) False (b) True
  39. 39.True or false: a capacitor turns a fan or wheels. (a) True (b) False
  40. 40.What does a diode do? (a) turns a fan or wheels (b) glows using little power (c) lets current go one way (d) is a resistance knob

Answer key

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

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