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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 113 · 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.What does a motor do? (a) boosts a small signal (b) blows if current is high (c) senses how hot it is (d) turns a fan or wheels
  2. 2.What does an LED do? (a) glows using little power (b) has coloured bands (c) makes things spin (d) is a resistance knob
  3. 3.What does a capacitor do? (a) lets current go one way (b) stores a little charge (c) glows using little power (d) beeps for an alarm
  4. 4.🧩 Which component smooths a wobbly supply? (a) diode (b) resistor (c) capacitor (d) LDR
  5. 5.True or false: a thermistor makes things spin. (a) False (b) True
  6. 6.True or false: a buzzer beeps for an alarm. (a) True (b) False
  7. 7.🧩 Which part changes electrical energy into movement? (a) a resistor (b) a motor (c) a fuse (d) an LED
  8. 8.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a diode (c) a buzzer (d) a capacitor
  9. 9.True or false: a resistor limits the current. (a) True (b) False
  10. 10.True or false: a fuse turns a fan or wheels. (a) True (b) False
  11. 11.🧩 A capacitor in a circuit can … (a) store charge briefly (b) measure heat (c) spin a wheel (d) make light
  12. 12.What does an LDR do? (a) has coloured bands (b) blows if current is high (c) makes things spin (d) senses how bright it is
  13. 13.🧩 Which component turns a fan or wheels? (a) capacitor (b) resistor (c) motor (d) LED
  14. 14.True or false: a transistor has coloured bands. (a) True (b) False
  15. 15.What does a resistor do? (a) smooths a wobbly supply (b) glows using little power (c) beeps for an alarm (d) has coloured bands
  16. 16.True or false: a potentiometer is a resistance knob. (a) True (b) False
  17. 17.🧩 Which component has coloured bands? (a) potentiometer (b) LDR (c) resistor (d) diode
  18. 18.True or false: an LDR is a resistance knob. (a) False (b) True
  19. 19.🧩 Which component senses how hot it is? (a) fuse (b) resistor (c) thermistor (d) potentiometer
  20. 20.True or false: a transistor smooths a wobbly supply. (a) False (b) True
  21. 21.What does a potentiometer do? (a) limits the current (b) is a resistance knob (c) has coloured bands (d) makes a beeping sound
  22. 22.True or false: a resistor senses how bright it is. (a) False (b) True
  23. 23.🧩 Which component limits the current? (a) potentiometer (b) fuse (c) diode (d) resistor
  24. 24.What does a resistor do? (a) is a resistance knob (b) senses how hot it is (c) beeps for an alarm (d) limits the current
  25. 25.🧩 Which component glows using little power? (a) motor (b) transistor (c) fuse (d) LED
  26. 26.True or false: a thermistor boosts a small signal. (a) True (b) False
  27. 27.True or false: a capacitor lets current go one way. (a) False (b) True
  28. 28.🧩 Which component makes a beeping sound? (a) transistor (b) LED (c) LDR (d) buzzer
  29. 29.🧩 Which component lets current go one way? (a) thermistor (b) LED (c) resistor (d) diode
  30. 30.🧩 Which component stores a little charge? (a) potentiometer (b) capacitor (c) motor (d) LED
  31. 31.True or false: a motor turns a fan or wheels. (a) True (b) False
  32. 32.What does a buzzer do? (a) stores a little charge (b) limits the current (c) is a resistance knob (d) makes a beeping sound
  33. 33.What does a thermistor do? (a) senses how hot it is (b) stores a little charge (c) blows if current is high (d) limits the current
  34. 34.True or false: a transistor stores a little charge. (a) True (b) False
  35. 35.🧩 Which component beeps for an alarm? (a) thermistor (b) fuse (c) buzzer (d) diode
  36. 36.True or false: a fuse boosts a small signal. (a) True (b) False
  37. 37.🧩 Which component blows if current is high? (a) potentiometer (b) fuse (c) resistor (d) transistor
  38. 38.True or false: an LDR senses how bright it is. (a) False (b) True
  39. 39.True or false: a diode stores a little charge. (a) True (b) False
  40. 40.True or false: an LDR turns a fan or wheels. (a) True (b) False

Answer key

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

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