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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 182 · 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) makes things spin (b) blows if current is high (c) lets current go one way (d) limits the current
  2. 2.🧩 Which part changes electrical energy into movement? (a) an LED (b) a fuse (c) a motor (d) a resistor
  3. 3.🧩 Which part changes electrical energy into sound? (a) a diode (b) a resistor (c) a buzzer (d) a capacitor
  4. 4.What does a capacitor do? (a) limits the current (b) glows using little power (c) smooths a wobbly supply (d) is a resistance knob
  5. 5.True or false: a potentiometer limits the current. (a) True (b) False
  6. 6.🧩 Which component makes things spin? (a) thermistor (b) motor (c) LED (d) resistor
  7. 7.What does an LED do? (a) stores a little charge (b) smooths a wobbly supply (c) makes things spin (d) glows using little power
  8. 8.🧩 Which component stores a little charge? (a) fuse (b) potentiometer (c) LED (d) capacitor
  9. 9.🧩 Which component is a resistance knob? (a) motor (b) LED (c) resistor (d) potentiometer
  10. 10.🧩 Which component blows if current is high? (a) transistor (b) diode (c) fuse (d) motor
  11. 11.True or false: an LDR makes things spin. (a) True (b) False
  12. 12.What does a thermistor do? (a) is a resistance knob (b) has coloured bands (c) senses how hot it is (d) limits the current
  13. 13.🧩 Which component boosts a small signal? (a) transistor (b) motor (c) capacitor (d) potentiometer
  14. 14.True or false: a potentiometer senses how bright it is. (a) True (b) False
  15. 15.True or false: a potentiometer makes a beeping sound. (a) False (b) True
  16. 16.🧩 Which component limits the current? (a) buzzer (b) LED (c) capacitor (d) resistor
  17. 17.True or false: a resistor makes a beeping sound. (a) True (b) False
  18. 18.True or false: a potentiometer boosts a small signal. (a) False (b) True
  19. 19.True or false: a diode lets current go one way. (a) False (b) True
  20. 20.🧩 Which component glows using little power? (a) LED (b) buzzer (c) thermistor (d) fuse
  21. 21.True or false: a motor turns a fan or wheels. (a) False (b) True
  22. 22.🧩 Which component turns a fan or wheels? (a) capacitor (b) thermistor (c) LED (d) motor
  23. 23.What does a buzzer do? (a) senses how hot it is (b) makes a beeping sound (c) turns a fan or wheels (d) smooths a wobbly supply
  24. 24.What does a buzzer do? (a) has coloured bands (b) beeps for an alarm (c) makes things spin (d) lets current go one way
  25. 25.True or false: a resistor senses how bright it is. (a) True (b) False
  26. 26.🧩 A capacitor in a circuit can … (a) spin a wheel (b) store charge briefly (c) measure heat (d) make light
  27. 27.What does a resistor do? (a) beeps for an alarm (b) boosts a small signal (c) stores a little charge (d) has coloured bands
  28. 28.True or false: an LED glows using little power. (a) True (b) False
  29. 29.What does an LDR do? (a) makes a beeping sound (b) has coloured bands (c) boosts a small signal (d) senses how bright it is
  30. 30.🧩 Which component beeps for an alarm? (a) capacitor (b) buzzer (c) resistor (d) transistor
  31. 31.What does a capacitor do? (a) stores a little charge (b) senses how bright it is (c) senses how hot it is (d) glows using little power
  32. 32.True or false: a transistor boosts a small signal. (a) False (b) True
  33. 33.🧩 Which component smooths a wobbly supply? (a) capacitor (b) LDR (c) resistor (d) transistor
  34. 34.True or false: a transistor smooths a wobbly supply. (a) True (b) False
  35. 35.What does a potentiometer do? (a) has coloured bands (b) boosts a small signal (c) lets current go one way (d) is a resistance knob
  36. 36.What does a diode do? (a) turns a fan or wheels (b) smooths a wobbly supply (c) blows if current is high (d) lets current go one way
  37. 37.🧩 Which component has coloured bands? (a) transistor (b) potentiometer (c) resistor (d) buzzer
  38. 38.True or false: a potentiometer is a resistance knob. (a) False (b) True
  39. 39.True or false: a capacitor stores a little charge. (a) True (b) False
  40. 40.True or false: an LED has coloured bands. (a) False (b) True

Answer key

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

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