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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 246 · 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 transistor do? (a) boosts a small signal (b) makes a beeping sound (c) beeps for an alarm (d) limits the current
  2. 2.What does an LDR do? (a) makes a beeping sound (b) senses how bright it is (c) senses how hot it is (d) is a resistance knob
  3. 3.🧩 Which component has coloured bands? (a) LDR (b) diode (c) resistor (d) capacitor
  4. 4.True or false: a resistor senses how bright it is. (a) False (b) True
  5. 5.What does a potentiometer do? (a) senses how bright it is (b) limits the current (c) makes things spin (d) is a resistance knob
  6. 6.What does a thermistor do? (a) boosts a small signal (b) senses how hot it is (c) glows using little power (d) blows if current is high
  7. 7.🧩 Which component limits the current? (a) resistor (b) potentiometer (c) thermistor (d) LDR
  8. 8.🧩 Which component blows if current is high? (a) capacitor (b) LED (c) motor (d) fuse
  9. 9.🧩 A capacitor in a circuit can … (a) spin a wheel (b) measure heat (c) make light (d) store charge briefly
  10. 10.True or false: a diode has coloured bands. (a) False (b) True
  11. 11.True or false: a resistor limits the current. (a) False (b) True
  12. 12.🧩 Which component beeps for an alarm? (a) LED (b) thermistor (c) buzzer (d) transistor
  13. 13.True or false: a potentiometer is a resistance knob. (a) False (b) True
  14. 14.🧩 Which component senses how bright it is? (a) thermistor (b) fuse (c) potentiometer (d) LDR
  15. 15.True or false: a resistor has coloured bands. (a) False (b) True
  16. 16.True or false: a motor makes things spin. (a) True (b) False
  17. 17.True or false: a buzzer beeps for an alarm. (a) False (b) True
  18. 18.🧩 Which component makes a beeping sound? (a) buzzer (b) fuse (c) potentiometer (d) diode
  19. 19.🧩 Which component senses how hot it is? (a) LED (b) fuse (c) resistor (d) thermistor
  20. 20.🧩 Which part changes electrical energy into movement? (a) a fuse (b) a resistor (c) an LED (d) a motor
  21. 21.What does a motor do? (a) lets current go one way (b) smooths a wobbly supply (c) beeps for an alarm (d) turns a fan or wheels
  22. 22.🧩 Which component glows using little power? (a) transistor (b) diode (c) LED (d) buzzer
  23. 23.True or false: a fuse blows if current is high. (a) False (b) True
  24. 24.What does a motor do? (a) boosts a small signal (b) limits the current (c) makes things spin (d) senses how hot it is
  25. 25.True or false: a diode lets current go one way. (a) True (b) False
  26. 26.True or false: a buzzer senses how bright it is. (a) True (b) False
  27. 27.True or false: a capacitor smooths a wobbly supply. (a) True (b) False
  28. 28.What does a capacitor do? (a) senses how bright it is (b) stores a little charge (c) beeps for an alarm (d) senses how hot it is
  29. 29.What does a diode do? (a) limits the current (b) turns a fan or wheels (c) glows using little power (d) lets current go one way
  30. 30.True or false: a thermistor senses how hot it is. (a) False (b) True
  31. 31.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a capacitor (c) a diode (d) a buzzer
  32. 32.True or false: a capacitor blows if current is high. (a) True (b) False
  33. 33.What does a buzzer do? (a) stores a little charge (b) beeps for an alarm (c) smooths a wobbly supply (d) boosts a small signal
  34. 34.True or false: an LDR limits the current. (a) True (b) False
  35. 35.🧩 Which component stores a little charge? (a) motor (b) capacitor (c) buzzer (d) resistor
  36. 36.🧩 Which component is a resistance knob? (a) capacitor (b) potentiometer (c) LED (d) diode
  37. 37.What does a resistor do? (a) makes things spin (b) beeps for an alarm (c) lets current go one way (d) limits the current
  38. 38.🧩 Which component turns a fan or wheels? (a) resistor (b) motor (c) transistor (d) LED
  39. 39.True or false: a potentiometer lets current go one way. (a) True (b) False
  40. 40.🧩 Which component smooths a wobbly supply? (a) motor (b) capacitor (c) LED (d) LDR

Answer key

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

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