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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 583 · 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.

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

Answer key

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

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