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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 457 · 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) lets current go one way (b) makes things spin (c) glows using little power (d) is a resistance knob
  2. 2.🧩 Which component beeps for an alarm? (a) diode (b) transistor (c) resistor (d) buzzer
  3. 3.🧩 Which component smooths a wobbly supply? (a) LED (b) diode (c) fuse (d) capacitor
  4. 4.True or false: a capacitor senses how bright it is. (a) True (b) False
  5. 5.🧩 Which component turns a fan or wheels? (a) LED (b) fuse (c) motor (d) transistor
  6. 6.True or false: a resistor limits the current. (a) False (b) True
  7. 7.🧩 Which component lets current go one way? (a) capacitor (b) diode (c) thermistor (d) fuse
  8. 8.True or false: a thermistor senses how hot it is. (a) True (b) False
  9. 9.🧩 Which part changes electrical energy into movement? (a) a fuse (b) an LED (c) a resistor (d) a motor
  10. 10.True or false: a fuse blows if current is high. (a) True (b) False
  11. 11.🧩 A capacitor in a circuit can … (a) spin a wheel (b) store charge briefly (c) measure heat (d) make light
  12. 12.🧩 Which component senses how bright it is? (a) buzzer (b) potentiometer (c) LDR (d) LED
  13. 13.What does a motor do? (a) blows if current is high (b) makes things spin (c) smooths a wobbly supply (d) makes a beeping sound
  14. 14.True or false: a fuse is a resistance knob. (a) True (b) False
  15. 15.True or false: a transistor smooths a wobbly supply. (a) False (b) True
  16. 16.🧩 Which part changes electrical energy into sound? (a) a diode (b) a buzzer (c) a resistor (d) a capacitor
  17. 17.True or false: a buzzer makes a beeping sound. (a) False (b) True
  18. 18.🧩 Which component blows if current is high? (a) resistor (b) fuse (c) capacitor (d) potentiometer
  19. 19.True or false: a capacitor smooths a wobbly supply. (a) True (b) False
  20. 20.What does a fuse do? (a) blows if current is high (b) beeps for an alarm (c) is a resistance knob (d) makes a beeping sound
  21. 21.True or false: a thermistor glows using little power. (a) False (b) True
  22. 22.What does a thermistor do? (a) turns a fan or wheels (b) blows if current is high (c) lets current go one way (d) senses how hot it is
  23. 23.What does an LED do? (a) glows using little power (b) has coloured bands (c) senses how hot it is (d) limits the current
  24. 24.🧩 Which component has coloured bands? (a) diode (b) potentiometer (c) resistor (d) thermistor
  25. 25.What does a resistor do? (a) is a resistance knob (b) limits the current (c) senses how bright it is (d) blows if current is high
  26. 26.What does a resistor do? (a) is a resistance knob (b) senses how bright it is (c) makes things spin (d) has coloured bands
  27. 27.What does a potentiometer do? (a) makes things spin (b) glows using little power (c) is a resistance knob (d) smooths a wobbly supply
  28. 28.True or false: a transistor boosts a small signal. (a) False (b) True
  29. 29.True or false: an LED smooths a wobbly supply. (a) False (b) True
  30. 30.True or false: a diode senses how hot it is. (a) True (b) False
  31. 31.True or false: a resistor smooths a wobbly supply. (a) False (b) True
  32. 32.🧩 Which component glows using little power? (a) motor (b) LED (c) potentiometer (d) thermistor
  33. 33.True or false: a diode turns a fan or wheels. (a) False (b) True
  34. 34.What does a buzzer do? (a) is a resistance knob (b) lets current go one way (c) beeps for an alarm (d) limits the current
  35. 35.🧩 Which component stores a little charge? (a) potentiometer (b) capacitor (c) motor (d) LED
  36. 36.What does a capacitor do? (a) glows using little power (b) makes things spin (c) stores a little charge (d) limits the current
  37. 37.True or false: a thermistor boosts a small signal. (a) True (b) False
  38. 38.🧩 Which component is a resistance knob? (a) motor (b) resistor (c) fuse (d) potentiometer
  39. 39.🧩 Which component boosts a small signal? (a) motor (b) resistor (c) transistor (d) buzzer
  40. 40.True or false: a motor makes things spin. (a) False (b) True

Answer key

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

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