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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 492 · 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 part changes electrical energy into sound? (a) a capacitor (b) a resistor (c) a buzzer (d) a diode
  2. 2.🧩 Which component makes things spin? (a) motor (b) diode (c) buzzer (d) LED
  3. 3.True or false: a transistor boosts a small signal. (a) True (b) False
  4. 4.🧩 Which part changes electrical energy into movement? (a) a resistor (b) a motor (c) a fuse (d) an LED
  5. 5.What does a potentiometer do? (a) blows if current is high (b) senses how bright it is (c) lets current go one way (d) is a resistance knob
  6. 6.What does an LDR do? (a) is a resistance knob (b) senses how bright it is (c) limits the current (d) stores a little charge
  7. 7.What does a diode do? (a) has coloured bands (b) turns a fan or wheels (c) smooths a wobbly supply (d) lets current go one way
  8. 8.What does a motor do? (a) has coloured bands (b) smooths a wobbly supply (c) turns a fan or wheels (d) makes a beeping sound
  9. 9.True or false: a motor makes a beeping sound. (a) True (b) False
  10. 10.True or false: a buzzer stores a little charge. (a) False (b) True
  11. 11.True or false: a capacitor has coloured bands. (a) False (b) True
  12. 12.True or false: a potentiometer makes things spin. (a) False (b) True
  13. 13.What does a motor do? (a) stores a little charge (b) smooths a wobbly supply (c) makes things spin (d) is a resistance knob
  14. 14.True or false: a fuse beeps for an alarm. (a) True (b) False
  15. 15.What does a resistor do? (a) lets current go one way (b) makes a beeping sound (c) beeps for an alarm (d) has coloured bands
  16. 16.🧩 A capacitor in a circuit can … (a) make light (b) store charge briefly (c) measure heat (d) spin a wheel
  17. 17.True or false: a diode turns a fan or wheels. (a) False (b) True
  18. 18.🧩 Which component stores a little charge? (a) diode (b) capacitor (c) thermistor (d) potentiometer
  19. 19.🧩 Which component has coloured bands? (a) capacitor (b) thermistor (c) fuse (d) resistor
  20. 20.🧩 Which component beeps for an alarm? (a) buzzer (b) thermistor (c) LDR (d) transistor
  21. 21.What does a fuse do? (a) makes a beeping sound (b) smooths a wobbly supply (c) blows if current is high (d) lets current go one way
  22. 22.🧩 Which component limits the current? (a) resistor (b) potentiometer (c) LDR (d) capacitor
  23. 23.What does a resistor do? (a) boosts a small signal (b) limits the current (c) makes things spin (d) smooths a wobbly supply
  24. 24.True or false: an LDR senses how bright it is. (a) False (b) True
  25. 25.True or false: a resistor has coloured bands. (a) True (b) False
  26. 26.True or false: an LED glows using little power. (a) True (b) False
  27. 27.🧩 Which component senses how bright it is? (a) LED (b) fuse (c) transistor (d) LDR
  28. 28.What does a transistor do? (a) senses how hot it is (b) boosts a small signal (c) makes things spin (d) smooths a wobbly supply
  29. 29.What does a capacitor do? (a) stores a little charge (b) blows if current is high (c) is a resistance knob (d) turns a fan or wheels
  30. 30.What does an LED do? (a) senses how hot it is (b) has coloured bands (c) lets current go one way (d) glows using little power
  31. 31.🧩 Which component boosts a small signal? (a) resistor (b) LED (c) transistor (d) buzzer
  32. 32.True or false: a thermistor turns a fan or wheels. (a) True (b) False
  33. 33.🧩 Which component lets current go one way? (a) fuse (b) potentiometer (c) motor (d) diode
  34. 34.🧩 Which component smooths a wobbly supply? (a) diode (b) buzzer (c) capacitor (d) resistor
  35. 35.🧩 Which component makes a beeping sound? (a) buzzer (b) motor (c) diode (d) capacitor
  36. 36.🧩 Which component blows if current is high? (a) motor (b) resistor (c) fuse (d) thermistor
  37. 37.True or false: a resistor senses how hot it is. (a) False (b) True
  38. 38.True or false: a buzzer makes things spin. (a) True (b) False
  39. 39.What does a buzzer do? (a) makes a beeping sound (b) has coloured bands (c) makes things spin (d) senses how bright it is
  40. 40.True or false: a capacitor stores a little charge. (a) True (b) False

Answer key

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

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