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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 454 · 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: a motor limits the current. (a) False (b) True
  2. 2.True or false: a motor makes things spin. (a) True (b) False
  3. 3.True or false: a motor turns a fan or wheels. (a) False (b) True
  4. 4.🧩 Which component makes a beeping sound? (a) thermistor (b) buzzer (c) LDR (d) resistor
  5. 5.🧩 Which component senses how hot it is? (a) buzzer (b) LED (c) LDR (d) thermistor
  6. 6.🧩 Which component blows if current is high? (a) transistor (b) LED (c) fuse (d) capacitor
  7. 7.True or false: a potentiometer stores a little charge. (a) True (b) False
  8. 8.🧩 Which part changes electrical energy into movement? (a) a resistor (b) a fuse (c) a motor (d) an LED
  9. 9.True or false: a potentiometer is a resistance knob. (a) False (b) True
  10. 10.🧩 A capacitor in a circuit can … (a) store charge briefly (b) measure heat (c) make light (d) spin a wheel
  11. 11.True or false: a resistor limits the current. (a) True (b) False
  12. 12.🧩 Which component makes things spin? (a) transistor (b) diode (c) buzzer (d) motor
  13. 13.True or false: an LDR senses how bright it is. (a) False (b) True
  14. 14.True or false: an LED glows using little power. (a) False (b) True
  15. 15.🧩 Which component has coloured bands? (a) transistor (b) motor (c) buzzer (d) resistor
  16. 16.What does a resistor do? (a) lets current go one way (b) stores a little charge (c) senses how bright it is (d) has coloured bands
  17. 17.🧩 Which component beeps for an alarm? (a) buzzer (b) thermistor (c) motor (d) transistor
  18. 18.🧩 Which component senses how bright it is? (a) motor (b) LDR (c) fuse (d) capacitor
  19. 19.🧩 Which component limits the current? (a) transistor (b) resistor (c) capacitor (d) buzzer
  20. 20.What does a fuse do? (a) lets current go one way (b) beeps for an alarm (c) blows if current is high (d) turns a fan or wheels
  21. 21.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a diode (c) a capacitor (d) a buzzer
  22. 22.What does a motor do? (a) beeps for an alarm (b) makes a beeping sound (c) blows if current is high (d) turns a fan or wheels
  23. 23.True or false: an LDR makes things spin. (a) False (b) True
  24. 24.True or false: a diode smooths a wobbly supply. (a) False (b) True
  25. 25.What does a potentiometer do? (a) makes things spin (b) lets current go one way (c) is a resistance knob (d) has coloured bands
  26. 26.🧩 Which component lets current go one way? (a) potentiometer (b) fuse (c) diode (d) LDR
  27. 27.True or false: a thermistor lets current go one way. (a) True (b) False
  28. 28.True or false: a capacitor senses how hot it is. (a) True (b) False
  29. 29.🧩 Which component is a resistance knob? (a) buzzer (b) transistor (c) fuse (d) potentiometer
  30. 30.🧩 Which component boosts a small signal? (a) potentiometer (b) capacitor (c) LDR (d) transistor
  31. 31.True or false: a resistor has coloured bands. (a) False (b) True
  32. 32.True or false: a buzzer blows if current is high. (a) False (b) True
  33. 33.🧩 Which component turns a fan or wheels? (a) transistor (b) LDR (c) motor (d) resistor
  34. 34.True or false: a fuse blows if current is high. (a) False (b) True
  35. 35.What does a transistor do? (a) is a resistance knob (b) senses how bright it is (c) makes things spin (d) boosts a small signal
  36. 36.True or false: a motor smooths a wobbly supply. (a) False (b) True
  37. 37.What does an LDR do? (a) makes things spin (b) is a resistance knob (c) has coloured bands (d) senses how bright it is
  38. 38.🧩 Which component glows using little power? (a) resistor (b) transistor (c) LED (d) thermistor
  39. 39.What does a capacitor do? (a) beeps for an alarm (b) stores a little charge (c) is a resistance knob (d) limits the current
  40. 40.True or false: a transistor is a resistance knob. (a) False (b) True

Answer key

  1. False
  2. True
  3. True
  4. buzzer
  5. thermistor
  6. fuse
  7. False
  8. a motor
  9. True
  10. store charge briefly
  11. True
  12. motor
  13. True
  14. True
  15. resistor
  16. has coloured bands
  17. buzzer
  18. LDR
  19. resistor
  20. blows if current is high
  21. a buzzer
  22. turns a fan or wheels
  23. False
  24. False
  25. is a resistance knob
  26. diode
  27. False
  28. False
  29. potentiometer
  30. transistor
  31. True
  32. False
  33. motor
  34. True
  35. boosts a small signal
  36. False
  37. senses how bright it is
  38. LED
  39. stores a little charge
  40. False

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