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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 158 · 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 makes a beeping sound? (a) fuse (b) buzzer (c) potentiometer (d) capacitor
  2. 2.🧩 Which component is a resistance knob? (a) thermistor (b) resistor (c) potentiometer (d) LED
  3. 3.🧩 Which component has coloured bands? (a) fuse (b) resistor (c) buzzer (d) LED
  4. 4.🧩 Which component blows if current is high? (a) fuse (b) transistor (c) LED (d) diode
  5. 5.🧩 Which component senses how bright it is? (a) capacitor (b) potentiometer (c) LDR (d) resistor
  6. 6.True or false: an LDR senses how bright it is. (a) False (b) True
  7. 7.What does a thermistor do? (a) limits the current (b) boosts a small signal (c) is a resistance knob (d) senses how hot it is
  8. 8.What does a diode do? (a) senses how bright it is (b) senses how hot it is (c) lets current go one way (d) stores a little charge
  9. 9.🧩 Which component smooths a wobbly supply? (a) potentiometer (b) diode (c) thermistor (d) capacitor
  10. 10.🧩 Which component limits the current? (a) resistor (b) diode (c) buzzer (d) LDR
  11. 11.🧩 Which component stores a little charge? (a) capacitor (b) thermistor (c) potentiometer (d) LDR
  12. 12.What does a potentiometer do? (a) glows using little power (b) limits the current (c) is a resistance knob (d) beeps for an alarm
  13. 13.What does a resistor do? (a) senses how bright it is (b) senses how hot it is (c) limits the current (d) lets current go one way
  14. 14.🧩 Which component lets current go one way? (a) buzzer (b) fuse (c) LDR (d) diode
  15. 15.True or false: a fuse smooths a wobbly supply. (a) True (b) False
  16. 16.True or false: a resistor boosts a small signal. (a) True (b) False
  17. 17.🧩 A capacitor in a circuit can … (a) measure heat (b) make light (c) store charge briefly (d) spin a wheel
  18. 18.True or false: a fuse turns a fan or wheels. (a) False (b) True
  19. 19.What does a capacitor do? (a) makes things spin (b) senses how bright it is (c) makes a beeping sound (d) stores a little charge
  20. 20.True or false: a transistor boosts a small signal. (a) False (b) True
  21. 21.True or false: a resistor has coloured bands. (a) True (b) False
  22. 22.What does a fuse do? (a) smooths a wobbly supply (b) boosts a small signal (c) lets current go one way (d) blows if current is high
  23. 23.🧩 Which component beeps for an alarm? (a) transistor (b) resistor (c) diode (d) buzzer
  24. 24.What does an LDR do? (a) beeps for an alarm (b) makes a beeping sound (c) senses how bright it is (d) blows if current is high
  25. 25.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a buzzer (c) a diode (d) a resistor
  26. 26.True or false: a transistor senses how hot it is. (a) False (b) True
  27. 27.🧩 Which part changes electrical energy into movement? (a) a fuse (b) a motor (c) an LED (d) a resistor
  28. 28.True or false: an LDR smooths a wobbly supply. (a) False (b) True
  29. 29.True or false: a diode limits the current. (a) False (b) True
  30. 30.What does an LED do? (a) is a resistance knob (b) smooths a wobbly supply (c) has coloured bands (d) glows using little power
  31. 31.True or false: a resistor smooths a wobbly supply. (a) False (b) True
  32. 32.🧩 Which component boosts a small signal? (a) buzzer (b) motor (c) transistor (d) potentiometer
  33. 33.True or false: an LED glows using little power. (a) False (b) True
  34. 34.True or false: a buzzer makes a beeping sound. (a) True (b) False
  35. 35.True or false: an LDR has coloured bands. (a) False (b) True
  36. 36.🧩 Which component senses how hot it is? (a) diode (b) capacitor (c) buzzer (d) thermistor
  37. 37.What does a capacitor do? (a) blows if current is high (b) senses how bright it is (c) turns a fan or wheels (d) smooths a wobbly supply
  38. 38.True or false: a resistor makes a beeping sound. (a) True (b) False
  39. 39.True or false: a thermistor beeps for an alarm. (a) False (b) True
  40. 40.What does a buzzer do? (a) smooths a wobbly supply (b) glows using little power (c) makes a beeping sound (d) limits the current

Answer key

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

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