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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 714 · 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 resistor (b) a capacitor (c) a buzzer (d) a diode
  2. 2.What does a resistor do? (a) senses how hot it is (b) limits the current (c) senses how bright it is (d) smooths a wobbly supply
  3. 3.🧩 Which component boosts a small signal? (a) LED (b) buzzer (c) transistor (d) resistor
  4. 4.True or false: a transistor boosts a small signal. (a) True (b) False
  5. 5.🧩 Which component beeps for an alarm? (a) buzzer (b) LED (c) resistor (d) potentiometer
  6. 6.🧩 Which component blows if current is high? (a) capacitor (b) buzzer (c) fuse (d) LDR
  7. 7.True or false: a fuse senses how bright it is. (a) True (b) False
  8. 8.What does a potentiometer do? (a) stores a little charge (b) is a resistance knob (c) makes a beeping sound (d) senses how hot it is
  9. 9.🧩 A capacitor in a circuit can … (a) make light (b) measure heat (c) spin a wheel (d) store charge briefly
  10. 10.🧩 Which component senses how hot it is? (a) LED (b) thermistor (c) fuse (d) resistor
  11. 11.True or false: an LED blows if current is high. (a) True (b) False
  12. 12.🧩 Which component glows using little power? (a) resistor (b) potentiometer (c) transistor (d) LED
  13. 13.True or false: a buzzer beeps for an alarm. (a) False (b) True
  14. 14.What does a buzzer do? (a) stores a little charge (b) turns a fan or wheels (c) boosts a small signal (d) makes a beeping sound
  15. 15.🧩 Which component limits the current? (a) LED (b) fuse (c) motor (d) resistor
  16. 16.True or false: a capacitor glows using little power. (a) True (b) False
  17. 17.What does a transistor do? (a) has coloured bands (b) stores a little charge (c) senses how bright it is (d) boosts a small signal
  18. 18.What does a thermistor do? (a) boosts a small signal (b) makes a beeping sound (c) is a resistance knob (d) senses how hot it is
  19. 19.True or false: a potentiometer is a resistance knob. (a) True (b) False
  20. 20.What does a capacitor do? (a) limits the current (b) smooths a wobbly supply (c) makes things spin (d) makes a beeping sound
  21. 21.🧩 Which component stores a little charge? (a) LED (b) thermistor (c) LDR (d) capacitor
  22. 22.True or false: a fuse stores a little charge. (a) True (b) False
  23. 23.True or false: a resistor has coloured bands. (a) True (b) False
  24. 24.True or false: a motor beeps for an alarm. (a) False (b) True
  25. 25.What does a diode do? (a) limits the current (b) blows if current is high (c) lets current go one way (d) stores a little charge
  26. 26.True or false: a motor turns a fan or wheels. (a) False (b) True
  27. 27.What does a capacitor do? (a) makes a beeping sound (b) has coloured bands (c) stores a little charge (d) is a resistance knob
  28. 28.What does an LED do? (a) boosts a small signal (b) lets current go one way (c) stores a little charge (d) glows using little power
  29. 29.True or false: a motor smooths a wobbly supply. (a) True (b) False
  30. 30.True or false: an LED makes things spin. (a) False (b) True
  31. 31.🧩 Which part changes electrical energy into movement? (a) a resistor (b) an LED (c) a motor (d) a fuse
  32. 32.True or false: a fuse beeps for an alarm. (a) False (b) True
  33. 33.What does a fuse do? (a) turns a fan or wheels (b) senses how bright it is (c) boosts a small signal (d) blows if current is high
  34. 34.True or false: a thermistor smooths a wobbly supply. (a) True (b) False
  35. 35.🧩 Which component has coloured bands? (a) potentiometer (b) LED (c) resistor (d) motor
  36. 36.True or false: a fuse blows if current is high. (a) True (b) False
  37. 37.True or false: a capacitor makes things spin. (a) True (b) False
  38. 38.True or false: a transistor lets current go one way. (a) True (b) False
  39. 39.True or false: a capacitor stores a little charge. (a) True (b) False
  40. 40.True or false: a motor limits the current. (a) True (b) False

Answer key

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

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