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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 77 · 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.True or false: a buzzer limits the current. (a) True (b) False
  2. 2.🧩 Which component beeps for an alarm? (a) buzzer (b) resistor (c) potentiometer (d) diode
  3. 3.What does a resistor do? (a) limits the current (b) beeps for an alarm (c) stores a little charge (d) turns a fan or wheels
  4. 4.What does a motor do? (a) lets current go one way (b) makes things spin (c) beeps for an alarm (d) glows using little power
  5. 5.What does a buzzer do? (a) has coloured bands (b) beeps for an alarm (c) senses how hot it is (d) glows using little power
  6. 6.What does a transistor do? (a) boosts a small signal (b) smooths a wobbly supply (c) stores a little charge (d) lets current go one way
  7. 7.🧩 Which part changes electrical energy into sound? (a) a buzzer (b) a capacitor (c) a resistor (d) a diode
  8. 8.True or false: a transistor boosts a small signal. (a) False (b) True
  9. 9.🧩 Which component is a resistance knob? (a) potentiometer (b) LED (c) buzzer (d) thermistor
  10. 10.True or false: an LED glows using little power. (a) False (b) True
  11. 11.What does a capacitor do? (a) senses how bright it is (b) glows using little power (c) makes a beeping sound (d) stores a little charge
  12. 12.What does a diode do? (a) senses how bright it is (b) lets current go one way (c) stores a little charge (d) senses how hot it is
  13. 13.🧩 A capacitor in a circuit can … (a) store charge briefly (b) measure heat (c) spin a wheel (d) make light
  14. 14.True or false: a fuse blows if current is high. (a) False (b) True
  15. 15.🧩 Which component turns a fan or wheels? (a) buzzer (b) fuse (c) thermistor (d) motor
  16. 16.True or false: a capacitor smooths a wobbly supply. (a) True (b) False
  17. 17.🧩 Which component senses how hot it is? (a) LED (b) capacitor (c) thermistor (d) fuse
  18. 18.🧩 Which component has coloured bands? (a) diode (b) fuse (c) LED (d) resistor
  19. 19.🧩 Which component limits the current? (a) motor (b) diode (c) thermistor (d) resistor
  20. 20.🧩 Which part changes electrical energy into movement? (a) a fuse (b) a motor (c) a resistor (d) an LED
  21. 21.What does a thermistor do? (a) senses how hot it is (b) has coloured bands (c) turns a fan or wheels (d) makes a beeping sound
  22. 22.What does an LED do? (a) senses how bright it is (b) senses how hot it is (c) stores a little charge (d) glows using little power
  23. 23.True or false: a thermistor is a resistance knob. (a) True (b) False
  24. 24.What does a fuse do? (a) smooths a wobbly supply (b) beeps for an alarm (c) limits the current (d) blows if current is high
  25. 25.🧩 Which component smooths a wobbly supply? (a) LED (b) capacitor (c) potentiometer (d) motor
  26. 26.🧩 Which component boosts a small signal? (a) transistor (b) motor (c) capacitor (d) resistor
  27. 27.🧩 Which component senses how bright it is? (a) transistor (b) potentiometer (c) LDR (d) capacitor
  28. 28.🧩 Which component lets current go one way? (a) diode (b) capacitor (c) fuse (d) LED
  29. 29.True or false: a thermistor blows if current is high. (a) True (b) False
  30. 30.True or false: a resistor boosts a small signal. (a) False (b) True
  31. 31.🧩 Which component makes a beeping sound? (a) LDR (b) diode (c) buzzer (d) resistor
  32. 32.🧩 Which component makes things spin? (a) potentiometer (b) LDR (c) buzzer (d) motor
  33. 33.True or false: a diode beeps for an alarm. (a) False (b) True
  34. 34.What does a buzzer do? (a) makes a beeping sound (b) is a resistance knob (c) senses how hot it is (d) smooths a wobbly supply
  35. 35.True or false: a thermistor makes things spin. (a) False (b) True
  36. 36.True or false: a motor makes a beeping sound. (a) False (b) True
  37. 37.True or false: a motor is a resistance knob. (a) False (b) True
  38. 38.True or false: a capacitor stores a little charge. (a) False (b) True
  39. 39.True or false: a buzzer glows using little power. (a) True (b) False
  40. 40.What does a motor do? (a) turns a fan or wheels (b) limits the current (c) stores a little charge (d) smooths a wobbly supply

Answer key

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

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