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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 618 · 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 senses how bright it is. (a) False (b) True
  2. 2.True or false: a resistor lets current go one way. (a) False (b) True
  3. 3.What does an LED do? (a) glows using little power (b) lets current go one way (c) makes things spin (d) is a resistance knob
  4. 4.🧩 A capacitor in a circuit can … (a) store charge briefly (b) spin a wheel (c) make light (d) measure heat
  5. 5.🧩 Which component senses how bright it is? (a) LED (b) transistor (c) LDR (d) diode
  6. 6.🧩 Which part changes electrical energy into sound? (a) a buzzer (b) a diode (c) a capacitor (d) a resistor
  7. 7.🧩 Which component has coloured bands? (a) resistor (b) diode (c) buzzer (d) LDR
  8. 8.What does an LDR do? (a) beeps for an alarm (b) glows using little power (c) senses how bright it is (d) has coloured bands
  9. 9.True or false: a potentiometer blows if current is high. (a) False (b) True
  10. 10.🧩 Which component limits the current? (a) LED (b) potentiometer (c) thermistor (d) resistor
  11. 11.What does a capacitor do? (a) beeps for an alarm (b) stores a little charge (c) blows if current is high (d) makes a beeping sound
  12. 12.🧩 Which component is a resistance knob? (a) motor (b) buzzer (c) resistor (d) potentiometer
  13. 13.True or false: an LDR limits the current. (a) True (b) False
  14. 14.What does a diode do? (a) smooths a wobbly supply (b) senses how hot it is (c) lets current go one way (d) stores a little charge
  15. 15.What does a resistor do? (a) glows using little power (b) smooths a wobbly supply (c) beeps for an alarm (d) limits the current
  16. 16.What does a transistor do? (a) blows if current is high (b) stores a little charge (c) boosts a small signal (d) senses how hot it is
  17. 17.True or false: a thermistor senses how hot it is. (a) True (b) False
  18. 18.True or false: a capacitor stores a little charge. (a) True (b) False
  19. 19.🧩 Which component blows if current is high? (a) LDR (b) fuse (c) capacitor (d) motor
  20. 20.🧩 Which component stores a little charge? (a) capacitor (b) resistor (c) LED (d) buzzer
  21. 21.True or false: an LDR is a resistance knob. (a) True (b) False
  22. 22.🧩 Which component senses how hot it is? (a) buzzer (b) fuse (c) thermistor (d) LDR
  23. 23.🧩 Which part changes electrical energy into movement? (a) a resistor (b) a fuse (c) a motor (d) an LED
  24. 24.True or false: a fuse stores a little charge. (a) False (b) True
  25. 25.True or false: a thermistor beeps for an alarm. (a) True (b) False
  26. 26.True or false: a thermistor makes a beeping sound. (a) False (b) True
  27. 27.🧩 Which component glows using little power? (a) resistor (b) diode (c) LED (d) potentiometer
  28. 28.🧩 Which component makes a beeping sound? (a) thermistor (b) buzzer (c) diode (d) LED
  29. 29.🧩 Which component turns a fan or wheels? (a) capacitor (b) motor (c) LDR (d) transistor
  30. 30.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
  31. 31.🧩 Which component smooths a wobbly supply? (a) diode (b) fuse (c) thermistor (d) capacitor
  32. 32.🧩 Which component makes things spin? (a) motor (b) capacitor (c) LDR (d) resistor
  33. 33.True or false: a potentiometer glows using little power. (a) True (b) False
  34. 34.What does a potentiometer do? (a) blows if current is high (b) is a resistance knob (c) turns a fan or wheels (d) senses how hot it is
  35. 35.What does a thermistor do? (a) boosts a small signal (b) senses how hot it is (c) is a resistance knob (d) has coloured bands
  36. 36.True or false: a motor blows if current is high. (a) False (b) True
  37. 37.What does a buzzer do? (a) makes a beeping sound (b) has coloured bands (c) senses how bright it is (d) is a resistance knob
  38. 38.What does an LED do? (a) stores a little charge (b) blows if current is high (c) glows using little power (d) limits the current
  39. 39.What does a resistor do? (a) senses how bright it is (b) has coloured bands (c) beeps for an alarm (d) makes a beeping sound
  40. 40.🧩 Which component has coloured bands? (a) capacitor (b) resistor (c) LDR (d) potentiometer

Answer key

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

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