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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 517 · 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.🧩 A capacitor in a circuit can … (a) measure heat (b) make light (c) spin a wheel (d) store charge briefly
  2. 2.🧩 Which component makes a beeping sound? (a) fuse (b) transistor (c) buzzer (d) thermistor
  3. 3.What does a thermistor do? (a) senses how bright it is (b) glows using little power (c) smooths a wobbly supply (d) senses how hot it is
  4. 4.True or false: a potentiometer is a resistance knob. (a) True (b) False
  5. 5.What does a capacitor do? (a) blows if current is high (b) glows using little power (c) is a resistance knob (d) smooths a wobbly supply
  6. 6.🧩 Which component limits the current? (a) capacitor (b) transistor (c) resistor (d) buzzer
  7. 7.🧩 Which component beeps for an alarm? (a) potentiometer (b) buzzer (c) LED (d) LDR
  8. 8.🧩 Which component senses how bright it is? (a) LDR (b) fuse (c) diode (d) resistor
  9. 9.True or false: a capacitor makes a beeping sound. (a) False (b) True
  10. 10.True or false: a capacitor senses how bright it is. (a) False (b) True
  11. 11.What does a potentiometer do? (a) is a resistance knob (b) stores a little charge (c) has coloured bands (d) limits the current
  12. 12.True or false: an LED has coloured bands. (a) True (b) False
  13. 13.🧩 Which component smooths a wobbly supply? (a) buzzer (b) motor (c) LDR (d) capacitor
  14. 14.🧩 Which component stores a little charge? (a) buzzer (b) capacitor (c) diode (d) potentiometer
  15. 15.True or false: a thermistor senses how hot it is. (a) False (b) True
  16. 16.What does a capacitor do? (a) limits the current (b) stores a little charge (c) senses how hot it is (d) is a resistance knob
  17. 17.🧩 Which component is a resistance knob? (a) buzzer (b) capacitor (c) potentiometer (d) LDR
  18. 18.True or false: a fuse lets current go one way. (a) False (b) True
  19. 19.True or false: a potentiometer blows if current is high. (a) True (b) False
  20. 20.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a buzzer (c) a diode (d) a capacitor
  21. 21.True or false: a buzzer beeps for an alarm. (a) True (b) False
  22. 22.True or false: a motor turns a fan or wheels. (a) True (b) False
  23. 23.What does an LED do? (a) stores a little charge (b) senses how bright it is (c) limits the current (d) glows using little power
  24. 24.True or false: a diode senses how bright it is. (a) True (b) False
  25. 25.🧩 Which component lets current go one way? (a) buzzer (b) diode (c) LDR (d) capacitor
  26. 26.What does a buzzer do? (a) beeps for an alarm (b) senses how hot it is (c) blows if current is high (d) is a resistance knob
  27. 27.True or false: a buzzer makes a beeping sound. (a) True (b) False
  28. 28.🧩 Which part changes electrical energy into movement? (a) a resistor (b) a motor (c) an LED (d) a fuse
  29. 29.What does a motor do? (a) senses how hot it is (b) turns a fan or wheels (c) stores a little charge (d) smooths a wobbly supply
  30. 30.What does a buzzer do? (a) senses how bright it is (b) has coloured bands (c) limits the current (d) makes a beeping sound
  31. 31.True or false: a capacitor makes things spin. (a) True (b) False
  32. 32.True or false: a capacitor smooths a wobbly supply. (a) True (b) False
  33. 33.What does a resistor do? (a) senses how bright it is (b) beeps for an alarm (c) has coloured bands (d) turns a fan or wheels
  34. 34.🧩 Which component makes things spin? (a) motor (b) LED (c) diode (d) capacitor
  35. 35.What does an LDR do? (a) turns a fan or wheels (b) senses how bright it is (c) boosts a small signal (d) senses how hot it is
  36. 36.True or false: a fuse is a resistance knob. (a) True (b) False
  37. 37.True or false: a transistor limits the current. (a) True (b) False
  38. 38.What does a diode do? (a) senses how hot it is (b) lets current go one way (c) blows if current is high (d) senses how bright it is
  39. 39.🧩 Which component turns a fan or wheels? (a) resistor (b) transistor (c) motor (d) thermistor
  40. 40.What does a motor do? (a) makes things spin (b) blows if current is high (c) is a resistance knob (d) stores a little charge

Answer key

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

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