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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 126 · 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: an LED glows using little power. (a) False (b) True
  2. 2.What does a transistor do? (a) boosts a small signal (b) limits the current (c) senses how bright it is (d) stores a little charge
  3. 3.🧩 Which part changes electrical energy into movement? (a) a fuse (b) a motor (c) an LED (d) a resistor
  4. 4.True or false: a motor has coloured bands. (a) True (b) False
  5. 5.What does a diode do? (a) senses how bright it is (b) smooths a wobbly supply (c) has coloured bands (d) lets current go one way
  6. 6.What does a buzzer do? (a) stores a little charge (b) makes a beeping sound (c) limits the current (d) glows using little power
  7. 7.True or false: an LED senses how bright it is. (a) False (b) True
  8. 8.True or false: a capacitor is a resistance knob. (a) True (b) False
  9. 9.What does a motor do? (a) blows if current is high (b) stores a little charge (c) is a resistance knob (d) makes things spin
  10. 10.🧩 Which component smooths a wobbly supply? (a) capacitor (b) thermistor (c) potentiometer (d) motor
  11. 11.🧩 Which component beeps for an alarm? (a) resistor (b) buzzer (c) transistor (d) diode
  12. 12.🧩 A capacitor in a circuit can … (a) make light (b) store charge briefly (c) measure heat (d) spin a wheel
  13. 13.True or false: a resistor has coloured bands. (a) False (b) True
  14. 14.What does a capacitor do? (a) beeps for an alarm (b) turns a fan or wheels (c) blows if current is high (d) stores a little charge
  15. 15.🧩 Which component is a resistance knob? (a) thermistor (b) LED (c) buzzer (d) potentiometer
  16. 16.🧩 Which component blows if current is high? (a) motor (b) capacitor (c) fuse (d) buzzer
  17. 17.What does a potentiometer do? (a) is a resistance knob (b) has coloured bands (c) limits the current (d) senses how bright it is
  18. 18.🧩 Which component senses how bright it is? (a) LDR (b) fuse (c) buzzer (d) diode
  19. 19.True or false: a diode makes a beeping sound. (a) False (b) True
  20. 20.True or false: a resistor stores a little charge. (a) False (b) True
  21. 21.True or false: a diode makes things spin. (a) True (b) False
  22. 22.🧩 Which component boosts a small signal? (a) motor (b) transistor (c) fuse (d) LDR
  23. 23.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a resistor (c) a buzzer (d) a diode
  24. 24.What does a capacitor do? (a) smooths a wobbly supply (b) glows using little power (c) is a resistance knob (d) makes a beeping sound
  25. 25.True or false: a transistor boosts a small signal. (a) False (b) True
  26. 26.True or false: a buzzer beeps for an alarm. (a) True (b) False
  27. 27.What does a fuse do? (a) smooths a wobbly supply (b) blows if current is high (c) limits the current (d) lets current go one way
  28. 28.🧩 Which component limits the current? (a) resistor (b) fuse (c) diode (d) capacitor
  29. 29.🧩 Which component stores a little charge? (a) capacitor (b) potentiometer (c) resistor (d) transistor
  30. 30.True or false: a capacitor lets current go one way. (a) False (b) True
  31. 31.🧩 Which component makes things spin? (a) diode (b) resistor (c) LDR (d) motor
  32. 32.What does a resistor do? (a) lets current go one way (b) limits the current (c) stores a little charge (d) makes things spin
  33. 33.True or false: a motor lets current go one way. (a) True (b) False
  34. 34.True or false: an LED boosts a small signal. (a) True (b) False
  35. 35.True or false: a buzzer turns a fan or wheels. (a) False (b) True
  36. 36.True or false: a diode stores a little charge. (a) False (b) True
  37. 37.🧩 Which component glows using little power? (a) LDR (b) LED (c) capacitor (d) potentiometer
  38. 38.What does an LED do? (a) boosts a small signal (b) stores a little charge (c) lets current go one way (d) glows using little power
  39. 39.True or false: a motor turns a fan or wheels. (a) True (b) False
  40. 40.What does a buzzer do? (a) blows if current is high (b) senses how bright it is (c) beeps for an alarm (d) limits the current

Answer key

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

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