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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 508 · 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 part changes electrical energy into sound? (a) a resistor (b) a diode (c) a capacitor (d) a buzzer
  2. 2.What does a buzzer do? (a) smooths a wobbly supply (b) lets current go one way (c) makes a beeping sound (d) has coloured bands
  3. 3.🧩 Which part changes electrical energy into movement? (a) a fuse (b) a motor (c) an LED (d) a resistor
  4. 4.🧩 Which component turns a fan or wheels? (a) transistor (b) motor (c) resistor (d) LDR
  5. 5.What does an LED do? (a) turns a fan or wheels (b) glows using little power (c) makes a beeping sound (d) lets current go one way
  6. 6.🧩 Which component boosts a small signal? (a) resistor (b) motor (c) potentiometer (d) transistor
  7. 7.What does a thermistor do? (a) smooths a wobbly supply (b) senses how hot it is (c) makes a beeping sound (d) turns a fan or wheels
  8. 8.🧩 Which component is a resistance knob? (a) fuse (b) motor (c) thermistor (d) potentiometer
  9. 9.True or false: a diode has coloured bands. (a) True (b) False
  10. 10.What does a fuse do? (a) glows using little power (b) makes things spin (c) blows if current is high (d) turns a fan or wheels
  11. 11.What does a resistor do? (a) limits the current (b) turns a fan or wheels (c) senses how hot it is (d) makes things spin
  12. 12.True or false: an LDR makes things spin. (a) False (b) True
  13. 13.True or false: a thermistor senses how bright it is. (a) False (b) True
  14. 14.True or false: a fuse limits the current. (a) True (b) False
  15. 15.True or false: a capacitor lets current go one way. (a) False (b) True
  16. 16.🧩 Which component senses how hot it is? (a) thermistor (b) transistor (c) resistor (d) fuse
  17. 17.🧩 Which component senses how bright it is? (a) LDR (b) resistor (c) potentiometer (d) motor
  18. 18.🧩 Which component blows if current is high? (a) LDR (b) fuse (c) capacitor (d) transistor
  19. 19.What does an LDR do? (a) senses how bright it is (b) smooths a wobbly supply (c) stores a little charge (d) makes things spin
  20. 20.True or false: a resistor limits the current. (a) False (b) True
  21. 21.🧩 Which component makes things spin? (a) thermistor (b) resistor (c) motor (d) transistor
  22. 22.🧩 Which component lets current go one way? (a) diode (b) thermistor (c) resistor (d) LDR
  23. 23.🧩 Which component limits the current? (a) motor (b) transistor (c) resistor (d) buzzer
  24. 24.What does a diode do? (a) lets current go one way (b) has coloured bands (c) smooths a wobbly supply (d) beeps for an alarm
  25. 25.🧩 A capacitor in a circuit can … (a) measure heat (b) store charge briefly (c) make light (d) spin a wheel
  26. 26.True or false: a buzzer beeps for an alarm. (a) False (b) True
  27. 27.True or false: an LED makes a beeping sound. (a) True (b) False
  28. 28.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
  29. 29.What does a motor do? (a) glows using little power (b) turns a fan or wheels (c) makes a beeping sound (d) senses how hot it is
  30. 30.🧩 Which component makes a beeping sound? (a) motor (b) capacitor (c) thermistor (d) buzzer
  31. 31.🧩 Which component has coloured bands? (a) transistor (b) potentiometer (c) buzzer (d) resistor
  32. 32.🧩 Which component stores a little charge? (a) thermistor (b) motor (c) capacitor (d) resistor
  33. 33.What does a capacitor do? (a) smooths a wobbly supply (b) makes a beeping sound (c) beeps for an alarm (d) blows if current is high
  34. 34.What does a resistor do? (a) makes things spin (b) lets current go one way (c) senses how hot it is (d) has coloured bands
  35. 35.True or false: a potentiometer turns a fan or wheels. (a) True (b) False
  36. 36.True or false: a diode beeps for an alarm. (a) True (b) False
  37. 37.True or false: an LED beeps for an alarm. (a) False (b) True
  38. 38.True or false: a motor turns a fan or wheels. (a) True (b) False
  39. 39.True or false: a motor senses how hot it is. (a) True (b) False
  40. 40.True or false: an LDR limits the current. (a) True (b) False

Answer key

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

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