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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 446 · 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 an LED do? (a) boosts a small signal (b) glows using little power (c) lets current go one way (d) limits the current
  2. 2.True or false: a thermistor senses how hot it is. (a) False (b) True
  3. 3.True or false: a buzzer lets current go one way. (a) False (b) True
  4. 4.🧩 A capacitor in a circuit can … (a) spin a wheel (b) make light (c) measure heat (d) store charge briefly
  5. 5.True or false: a capacitor stores a little charge. (a) False (b) True
  6. 6.What does a buzzer do? (a) senses how bright it is (b) makes a beeping sound (c) turns a fan or wheels (d) boosts a small signal
  7. 7.True or false: a fuse lets current go one way. (a) True (b) False
  8. 8.True or false: a motor turns a fan or wheels. (a) False (b) True
  9. 9.What does a potentiometer do? (a) stores a little charge (b) glows using little power (c) is a resistance knob (d) boosts a small signal
  10. 10.🧩 Which part changes electrical energy into movement? (a) a resistor (b) a motor (c) an LED (d) a fuse
  11. 11.True or false: a diode lets current go one way. (a) True (b) False
  12. 12.🧩 Which component beeps for an alarm? (a) transistor (b) capacitor (c) buzzer (d) LDR
  13. 13.True or false: an LED turns a fan or wheels. (a) True (b) False
  14. 14.True or false: a diode stores a little charge. (a) False (b) True
  15. 15.True or false: an LDR senses how bright it is. (a) True (b) False
  16. 16.What does a diode do? (a) glows using little power (b) limits the current (c) lets current go one way (d) boosts a small signal
  17. 17.True or false: a motor makes things spin. (a) True (b) False
  18. 18.True or false: an LED blows if current is high. (a) False (b) True
  19. 19.🧩 Which component makes things spin? (a) potentiometer (b) transistor (c) motor (d) fuse
  20. 20.What does an LDR do? (a) glows using little power (b) stores a little charge (c) lets current go one way (d) senses how bright it is
  21. 21.🧩 Which component limits the current? (a) resistor (b) LED (c) thermistor (d) potentiometer
  22. 22.🧩 Which component smooths a wobbly supply? (a) capacitor (b) thermistor (c) diode (d) buzzer
  23. 23.What does a fuse do? (a) has coloured bands (b) blows if current is high (c) beeps for an alarm (d) smooths a wobbly supply
  24. 24.True or false: a transistor boosts a small signal. (a) True (b) False
  25. 25.True or false: a resistor stores a little charge. (a) True (b) False
  26. 26.🧩 Which component senses how hot it is? (a) buzzer (b) motor (c) LDR (d) thermistor
  27. 27.True or false: a motor limits the current. (a) True (b) False
  28. 28.True or false: a resistor has coloured bands. (a) True (b) False
  29. 29.True or false: a motor glows using little power. (a) True (b) False
  30. 30.What does a motor do? (a) glows using little power (b) turns a fan or wheels (c) blows if current is high (d) beeps for an alarm
  31. 31.True or false: a resistor limits the current. (a) True (b) False
  32. 32.What does a buzzer do? (a) senses how bright it is (b) glows using little power (c) beeps for an alarm (d) lets current go one way
  33. 33.🧩 Which component lets current go one way? (a) LDR (b) diode (c) LED (d) resistor
  34. 34.True or false: a thermistor has coloured bands. (a) True (b) False
  35. 35.What does a resistor do? (a) glows using little power (b) beeps for an alarm (c) has coloured bands (d) makes things spin
  36. 36.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a resistor (c) a buzzer (d) a diode
  37. 37.🧩 Which component senses how bright it is? (a) buzzer (b) LED (c) LDR (d) motor
  38. 38.What does a thermistor do? (a) makes a beeping sound (b) senses how hot it is (c) limits the current (d) glows using little power
  39. 39.🧩 Which component glows using little power? (a) thermistor (b) fuse (c) diode (d) LED
  40. 40.What does a transistor do? (a) is a resistance knob (b) boosts a small signal (c) stores a little charge (d) blows if current is high

Answer key

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

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