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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 311 · 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 buzzer do? (a) boosts a small signal (b) glows using little power (c) makes a beeping sound (d) smooths a wobbly supply
  2. 2.True or false: a capacitor smooths a wobbly supply. (a) True (b) False
  3. 3.🧩 A capacitor in a circuit can … (a) store charge briefly (b) spin a wheel (c) measure heat (d) make light
  4. 4.🧩 Which component blows if current is high? (a) thermistor (b) LDR (c) fuse (d) LED
  5. 5.What does a fuse do? (a) makes things spin (b) beeps for an alarm (c) blows if current is high (d) lets current go one way
  6. 6.What does an LED do? (a) glows using little power (b) lets current go one way (c) stores a little charge (d) turns a fan or wheels
  7. 7.🧩 Which part changes electrical energy into sound? (a) a diode (b) a resistor (c) a buzzer (d) a capacitor
  8. 8.True or false: a thermistor senses how hot it is. (a) True (b) False
  9. 9.🧩 Which component beeps for an alarm? (a) LDR (b) capacitor (c) diode (d) buzzer
  10. 10.🧩 Which component glows using little power? (a) resistor (b) LDR (c) LED (d) buzzer
  11. 11.True or false: a buzzer beeps for an alarm. (a) False (b) True
  12. 12.🧩 Which part changes electrical energy into movement? (a) an LED (b) a fuse (c) a motor (d) a resistor
  13. 13.What does a diode do? (a) senses how bright it is (b) boosts a small signal (c) makes a beeping sound (d) lets current go one way
  14. 14.What does a capacitor do? (a) glows using little power (b) beeps for an alarm (c) smooths a wobbly supply (d) turns a fan or wheels
  15. 15.True or false: a resistor glows using little power. (a) False (b) True
  16. 16.True or false: an LDR senses how bright it is. (a) True (b) False
  17. 17.🧩 Which component is a resistance knob? (a) transistor (b) fuse (c) LED (d) potentiometer
  18. 18.🧩 Which component has coloured bands? (a) diode (b) capacitor (c) resistor (d) LED
  19. 19.🧩 Which component boosts a small signal? (a) potentiometer (b) motor (c) thermistor (d) transistor
  20. 20.🧩 Which component stores a little charge? (a) thermistor (b) potentiometer (c) resistor (d) capacitor
  21. 21.🧩 Which component limits the current? (a) capacitor (b) resistor (c) fuse (d) buzzer
  22. 22.What does a potentiometer do? (a) stores a little charge (b) is a resistance knob (c) blows if current is high (d) boosts a small signal
  23. 23.What does a capacitor do? (a) glows using little power (b) blows if current is high (c) turns a fan or wheels (d) stores a little charge
  24. 24.True or false: a resistor limits the current. (a) True (b) False
  25. 25.True or false: a motor lets current go one way. (a) True (b) False
  26. 26.True or false: a transistor glows using little power. (a) True (b) False
  27. 27.True or false: an LDR makes a beeping sound. (a) False (b) True
  28. 28.True or false: a fuse beeps for an alarm. (a) False (b) True
  29. 29.🧩 Which component senses how hot it is? (a) LDR (b) thermistor (c) buzzer (d) LED
  30. 30.True or false: an LED glows using little power. (a) False (b) True
  31. 31.True or false: a potentiometer lets current go one way. (a) False (b) True
  32. 32.True or false: a diode lets current go one way. (a) True (b) False
  33. 33.What does a resistor do? (a) stores a little charge (b) makes a beeping sound (c) has coloured bands (d) senses how hot it is
  34. 34.True or false: a capacitor limits the current. (a) False (b) True
  35. 35.🧩 Which component lets current go one way? (a) potentiometer (b) thermistor (c) diode (d) LDR
  36. 36.True or false: a transistor stores a little charge. (a) False (b) True
  37. 37.What does a thermistor do? (a) makes things spin (b) senses how hot it is (c) has coloured bands (d) makes a beeping sound
  38. 38.True or false: a thermistor lets current go one way. (a) False (b) True
  39. 39.What does an LDR do? (a) has coloured bands (b) senses how bright it is (c) stores a little charge (d) boosts a small signal
  40. 40.True or false: a fuse is a resistance knob. (a) False (b) True

Answer key

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

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