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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 94 · 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) has coloured bands (b) senses how bright it is (c) limits the current (d) glows using little power
  2. 2.True or false: a thermistor has coloured bands. (a) False (b) True
  3. 3.🧩 Which component beeps for an alarm? (a) potentiometer (b) motor (c) buzzer (d) fuse
  4. 4.What does a capacitor do? (a) stores a little charge (b) boosts a small signal (c) makes a beeping sound (d) beeps for an alarm
  5. 5.True or false: a capacitor makes things spin. (a) True (b) False
  6. 6.True or false: a buzzer limits the current. (a) False (b) True
  7. 7.What does a motor do? (a) has coloured bands (b) stores a little charge (c) makes a beeping sound (d) turns a fan or wheels
  8. 8.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a buzzer (c) a capacitor (d) a diode
  9. 9.🧩 A capacitor in a circuit can … (a) spin a wheel (b) measure heat (c) store charge briefly (d) make light
  10. 10.🧩 Which component has coloured bands? (a) LDR (b) motor (c) resistor (d) potentiometer
  11. 11.True or false: a resistor blows if current is high. (a) True (b) False
  12. 12.True or false: a capacitor makes a beeping sound. (a) True (b) False
  13. 13.True or false: a thermistor senses how hot it is. (a) True (b) False
  14. 14.🧩 Which part changes electrical energy into movement? (a) a fuse (b) a resistor (c) an LED (d) a motor
  15. 15.🧩 Which component senses how hot it is? (a) buzzer (b) motor (c) thermistor (d) capacitor
  16. 16.🧩 Which component limits the current? (a) fuse (b) LDR (c) capacitor (d) resistor
  17. 17.🧩 Which component turns a fan or wheels? (a) potentiometer (b) motor (c) buzzer (d) thermistor
  18. 18.What does a buzzer do? (a) senses how bright it is (b) beeps for an alarm (c) turns a fan or wheels (d) limits the current
  19. 19.True or false: a fuse limits the current. (a) True (b) False
  20. 20.🧩 Which component is a resistance knob? (a) buzzer (b) fuse (c) potentiometer (d) capacitor
  21. 21.What does a resistor do? (a) smooths a wobbly supply (b) boosts a small signal (c) turns a fan or wheels (d) limits the current
  22. 22.True or false: a buzzer beeps for an alarm. (a) True (b) False
  23. 23.True or false: an LDR senses how bright it is. (a) False (b) True
  24. 24.🧩 Which component lets current go one way? (a) resistor (b) potentiometer (c) motor (d) diode
  25. 25.What does a capacitor do? (a) senses how bright it is (b) makes things spin (c) is a resistance knob (d) smooths a wobbly supply
  26. 26.What does a fuse do? (a) blows if current is high (b) limits the current (c) beeps for an alarm (d) is a resistance knob
  27. 27.True or false: a buzzer smooths a wobbly supply. (a) False (b) True
  28. 28.🧩 Which component senses how bright it is? (a) fuse (b) diode (c) transistor (d) LDR
  29. 29.What does a motor do? (a) limits the current (b) makes things spin (c) stores a little charge (d) senses how hot it is
  30. 30.What does a resistor do? (a) beeps for an alarm (b) blows if current is high (c) has coloured bands (d) glows using little power
  31. 31.What does a thermistor do? (a) glows using little power (b) senses how hot it is (c) makes things spin (d) smooths a wobbly supply
  32. 32.True or false: a diode makes a beeping sound. (a) True (b) False
  33. 33.True or false: a buzzer makes a beeping sound. (a) False (b) True
  34. 34.True or false: a resistor has coloured bands. (a) False (b) True
  35. 35.True or false: a transistor boosts a small signal. (a) True (b) False
  36. 36.🧩 Which component smooths a wobbly supply? (a) resistor (b) buzzer (c) thermistor (d) capacitor
  37. 37.🧩 Which component boosts a small signal? (a) buzzer (b) LED (c) potentiometer (d) transistor
  38. 38.True or false: a potentiometer is a resistance knob. (a) False (b) True
  39. 39.What does an LDR do? (a) senses how bright it is (b) limits the current (c) smooths a wobbly supply (d) lets current go one way
  40. 40.🧩 Which component stores a little charge? (a) fuse (b) LDR (c) capacitor (d) thermistor

Answer key

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

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