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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 353 · 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.🧩 Which component smooths a wobbly supply? (a) fuse (b) capacitor (c) LED (d) potentiometer
  2. 2.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a diode (c) a buzzer (d) a resistor
  3. 3.🧩 Which component lets current go one way? (a) LED (b) thermistor (c) diode (d) potentiometer
  4. 4.🧩 Which component makes things spin? (a) transistor (b) buzzer (c) motor (d) LED
  5. 5.What does a buzzer do? (a) blows if current is high (b) has coloured bands (c) senses how bright it is (d) beeps for an alarm
  6. 6.🧩 Which component makes a beeping sound? (a) buzzer (b) motor (c) resistor (d) potentiometer
  7. 7.What does a fuse do? (a) makes things spin (b) limits the current (c) blows if current is high (d) makes a beeping sound
  8. 8.True or false: an LED boosts a small signal. (a) True (b) False
  9. 9.What does an LED do? (a) glows using little power (b) smooths a wobbly supply (c) blows if current is high (d) is a resistance knob
  10. 10.What does a resistor do? (a) limits the current (b) boosts a small signal (c) makes a beeping sound (d) smooths a wobbly supply
  11. 11.True or false: an LDR is a resistance knob. (a) True (b) False
  12. 12.🧩 A capacitor in a circuit can … (a) measure heat (b) spin a wheel (c) store charge briefly (d) make light
  13. 13.🧩 Which component boosts a small signal? (a) LDR (b) fuse (c) transistor (d) buzzer
  14. 14.What does a motor do? (a) boosts a small signal (b) makes a beeping sound (c) senses how bright it is (d) makes things spin
  15. 15.True or false: an LDR senses how bright it is. (a) False (b) True
  16. 16.🧩 Which part changes electrical energy into movement? (a) a motor (b) a fuse (c) an LED (d) a resistor
  17. 17.What does a diode do? (a) senses how hot it is (b) smooths a wobbly supply (c) makes a beeping sound (d) lets current go one way
  18. 18.True or false: a potentiometer smooths a wobbly supply. (a) False (b) True
  19. 19.What does a transistor do? (a) makes things spin (b) boosts a small signal (c) has coloured bands (d) limits the current
  20. 20.🧩 Which component limits the current? (a) fuse (b) capacitor (c) resistor (d) buzzer
  21. 21.True or false: an LDR smooths a wobbly supply. (a) True (b) False
  22. 22.What does a resistor do? (a) glows using little power (b) has coloured bands (c) senses how bright it is (d) stores a little charge
  23. 23.What does an LDR do? (a) turns a fan or wheels (b) senses how bright it is (c) is a resistance knob (d) boosts a small signal
  24. 24.🧩 Which component has coloured bands? (a) diode (b) buzzer (c) LDR (d) resistor
  25. 25.What does a thermistor do? (a) has coloured bands (b) is a resistance knob (c) senses how hot it is (d) glows using little power
  26. 26.True or false: an LDR blows if current is high. (a) False (b) True
  27. 27.🧩 Which component blows if current is high? (a) diode (b) buzzer (c) fuse (d) thermistor
  28. 28.🧩 Which component glows using little power? (a) diode (b) thermistor (c) transistor (d) LED
  29. 29.🧩 Which component is a resistance knob? (a) diode (b) potentiometer (c) buzzer (d) transistor
  30. 30.True or false: a resistor limits the current. (a) False (b) True
  31. 31.What does a potentiometer do? (a) is a resistance knob (b) senses how hot it is (c) makes things spin (d) smooths a wobbly supply
  32. 32.True or false: a buzzer beeps for an alarm. (a) False (b) True
  33. 33.🧩 Which component beeps for an alarm? (a) transistor (b) buzzer (c) capacitor (d) LDR
  34. 34.🧩 Which component senses how hot it is? (a) potentiometer (b) thermistor (c) capacitor (d) motor
  35. 35.True or false: a diode lets current go one way. (a) True (b) False
  36. 36.True or false: a fuse blows if current is high. (a) False (b) True
  37. 37.True or false: a transistor smooths a wobbly supply. (a) False (b) True
  38. 38.True or false: a potentiometer is a resistance knob. (a) True (b) False
  39. 39.True or false: a buzzer glows using little power. (a) False (b) True
  40. 40.🧩 Which component turns a fan or wheels? (a) buzzer (b) LDR (c) capacitor (d) motor

Answer key

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

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