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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 124 · 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 fuse do? (a) smooths a wobbly supply (b) blows if current is high (c) is a resistance knob (d) stores a little charge
  2. 2.🧩 Which component glows using little power? (a) potentiometer (b) motor (c) LED (d) resistor
  3. 3.🧩 Which component limits the current? (a) diode (b) LED (c) motor (d) resistor
  4. 4.True or false: an LDR lets current go one way. (a) True (b) False
  5. 5.🧩 A capacitor in a circuit can … (a) make light (b) measure heat (c) spin a wheel (d) store charge briefly
  6. 6.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
  7. 7.🧩 Which component beeps for an alarm? (a) potentiometer (b) transistor (c) resistor (d) buzzer
  8. 8.What does a resistor do? (a) glows using little power (b) limits the current (c) beeps for an alarm (d) stores a little charge
  9. 9.🧩 Which component lets current go one way? (a) motor (b) diode (c) resistor (d) thermistor
  10. 10.True or false: a fuse smooths a wobbly supply. (a) False (b) True
  11. 11.🧩 Which component stores a little charge? (a) fuse (b) buzzer (c) capacitor (d) motor
  12. 12.What does a diode do? (a) is a resistance knob (b) glows using little power (c) lets current go one way (d) makes things spin
  13. 13.🧩 Which part changes electrical energy into movement? (a) an LED (b) a motor (c) a resistor (d) a fuse
  14. 14.True or false: a buzzer beeps for an alarm. (a) False (b) True
  15. 15.True or false: an LED glows using little power. (a) True (b) False
  16. 16.True or false: a transistor senses how hot it is. (a) False (b) True
  17. 17.What does a thermistor do? (a) limits the current (b) glows using little power (c) boosts a small signal (d) senses how hot it is
  18. 18.🧩 Which component is a resistance knob? (a) buzzer (b) diode (c) thermistor (d) potentiometer
  19. 19.🧩 Which component makes a beeping sound? (a) buzzer (b) transistor (c) diode (d) resistor
  20. 20.What does a transistor do? (a) lets current go one way (b) blows if current is high (c) boosts a small signal (d) limits the current
  21. 21.What does a buzzer do? (a) limits the current (b) blows if current is high (c) makes things spin (d) beeps for an alarm
  22. 22.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a buzzer (c) a capacitor (d) a diode
  23. 23.True or false: an LDR smooths a wobbly supply. (a) False (b) True
  24. 24.True or false: a potentiometer boosts a small signal. (a) True (b) False
  25. 25.True or false: a diode glows using little power. (a) True (b) False
  26. 26.What does a capacitor do? (a) makes things spin (b) smooths a wobbly supply (c) has coloured bands (d) is a resistance knob
  27. 27.🧩 Which component smooths a wobbly supply? (a) LDR (b) capacitor (c) fuse (d) diode
  28. 28.🧩 Which component senses how bright it is? (a) LDR (b) buzzer (c) thermistor (d) resistor
  29. 29.What does a potentiometer do? (a) makes a beeping sound (b) is a resistance knob (c) smooths a wobbly supply (d) turns a fan or wheels
  30. 30.What does an LED do? (a) blows if current is high (b) senses how hot it is (c) glows using little power (d) beeps for an alarm
  31. 31.🧩 Which component turns a fan or wheels? (a) LDR (b) motor (c) potentiometer (d) fuse
  32. 32.True or false: a thermistor is a resistance knob. (a) True (b) False
  33. 33.True or false: a diode blows if current is high. (a) True (b) False
  34. 34.🧩 Which component blows if current is high? (a) LED (b) capacitor (c) fuse (d) potentiometer
  35. 35.True or false: a buzzer stores a little charge. (a) True (b) False
  36. 36.What does a resistor do? (a) stores a little charge (b) has coloured bands (c) boosts a small signal (d) beeps for an alarm
  37. 37.True or false: a thermistor makes things spin. (a) True (b) False
  38. 38.True or false: a capacitor boosts a small signal. (a) True (b) False
  39. 39.True or false: a resistor makes things spin. (a) True (b) False
  40. 40.True or false: an LDR is a resistance knob. (a) False (b) True

Answer key

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

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