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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 484 · 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 diode do? (a) glows using little power (b) stores a little charge (c) senses how hot it is (d) lets current go one way
  2. 2.🧩 Which component makes a beeping sound? (a) motor (b) potentiometer (c) buzzer (d) diode
  3. 3.🧩 Which component lets current go one way? (a) buzzer (b) resistor (c) LED (d) diode
  4. 4.🧩 Which component boosts a small signal? (a) resistor (b) transistor (c) LDR (d) diode
  5. 5.What does a capacitor do? (a) smooths a wobbly supply (b) limits the current (c) lets current go one way (d) makes a beeping sound
  6. 6.True or false: a capacitor lets current go one way. (a) False (b) True
  7. 7.True or false: a motor is a resistance knob. (a) True (b) False
  8. 8.🧩 Which component smooths a wobbly supply? (a) capacitor (b) fuse (c) diode (d) LED
  9. 9.True or false: a capacitor smooths a wobbly supply. (a) True (b) False
  10. 10.🧩 Which component glows using little power? (a) thermistor (b) transistor (c) diode (d) LED
  11. 11.🧩 Which part changes electrical energy into sound? (a) a diode (b) a buzzer (c) a capacitor (d) a resistor
  12. 12.True or false: a buzzer lets current go one way. (a) False (b) True
  13. 13.True or false: a transistor lets current go one way. (a) False (b) True
  14. 14.What does a transistor do? (a) has coloured bands (b) boosts a small signal (c) turns a fan or wheels (d) makes a beeping sound
  15. 15.🧩 Which component stores a little charge? (a) potentiometer (b) capacitor (c) LDR (d) transistor
  16. 16.True or false: an LED lets current go one way. (a) True (b) False
  17. 17.🧩 Which component blows if current is high? (a) diode (b) capacitor (c) LED (d) fuse
  18. 18.🧩 Which component turns a fan or wheels? (a) resistor (b) buzzer (c) LED (d) motor
  19. 19.🧩 Which component makes things spin? (a) potentiometer (b) thermistor (c) fuse (d) motor
  20. 20.What does a potentiometer do? (a) has coloured bands (b) lets current go one way (c) is a resistance knob (d) boosts a small signal
  21. 21.What does a fuse do? (a) turns a fan or wheels (b) boosts a small signal (c) makes things spin (d) blows if current is high
  22. 22.What does a capacitor do? (a) blows if current is high (b) glows using little power (c) beeps for an alarm (d) stores a little charge
  23. 23.🧩 Which part changes electrical energy into movement? (a) a fuse (b) an LED (c) a resistor (d) a motor
  24. 24.What does a buzzer do? (a) smooths a wobbly supply (b) glows using little power (c) limits the current (d) makes a beeping sound
  25. 25.True or false: a thermistor senses how hot it is. (a) False (b) True
  26. 26.True or false: a thermistor turns a fan or wheels. (a) True (b) False
  27. 27.True or false: a resistor limits the current. (a) True (b) False
  28. 28.🧩 A capacitor in a circuit can … (a) make light (b) spin a wheel (c) store charge briefly (d) measure heat
  29. 29.True or false: an LED makes things spin. (a) True (b) False
  30. 30.True or false: a diode stores a little charge. (a) True (b) False
  31. 31.True or false: a potentiometer makes a beeping sound. (a) False (b) True
  32. 32.True or false: a diode senses how hot it is. (a) True (b) False
  33. 33.True or false: a buzzer limits the current. (a) False (b) True
  34. 34.True or false: a diode limits the current. (a) True (b) False
  35. 35.True or false: a diode lets current go one way. (a) True (b) False
  36. 36.What does an LDR do? (a) limits the current (b) blows if current is high (c) senses how bright it is (d) beeps for an alarm
  37. 37.True or false: a capacitor stores a little charge. (a) False (b) True
  38. 38.True or false: an LDR glows using little power. (a) True (b) False
  39. 39.True or false: a potentiometer is a resistance knob. (a) True (b) False
  40. 40.True or false: an LED glows using little power. (a) True (b) False

Answer key

  1. lets current go one way
  2. buzzer
  3. diode
  4. transistor
  5. smooths a wobbly supply
  6. False
  7. False
  8. capacitor
  9. True
  10. LED
  11. a buzzer
  12. False
  13. False
  14. boosts a small signal
  15. capacitor
  16. False
  17. fuse
  18. motor
  19. motor
  20. is a resistance knob
  21. blows if current is high
  22. stores a little charge
  23. a motor
  24. makes a beeping sound
  25. True
  26. False
  27. True
  28. store charge briefly
  29. False
  30. False
  31. False
  32. False
  33. False
  34. False
  35. True
  36. senses how bright it is
  37. True
  38. False
  39. True
  40. True

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