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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 593 · 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 a diode do? (a) senses how bright it is (b) makes a beeping sound (c) smooths a wobbly supply (d) lets current go one way
  2. 2.🧩 Which component makes things spin? (a) capacitor (b) transistor (c) LED (d) motor
  3. 3.What does a resistor do? (a) glows using little power (b) senses how bright it is (c) blows if current is high (d) has coloured bands
  4. 4.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a capacitor (c) a buzzer (d) a diode
  5. 5.🧩 Which component glows using little power? (a) diode (b) capacitor (c) transistor (d) LED
  6. 6.True or false: a potentiometer is a resistance knob. (a) False (b) True
  7. 7.True or false: an LDR senses how bright it is. (a) False (b) True
  8. 8.🧩 A capacitor in a circuit can … (a) make light (b) store charge briefly (c) measure heat (d) spin a wheel
  9. 9.True or false: a motor is a resistance knob. (a) False (b) True
  10. 10.🧩 Which part changes electrical energy into movement? (a) a motor (b) a resistor (c) a fuse (d) an LED
  11. 11.🧩 Which component turns a fan or wheels? (a) LED (b) thermistor (c) capacitor (d) motor
  12. 12.True or false: a fuse smooths a wobbly supply. (a) False (b) True
  13. 13.True or false: a motor smooths a wobbly supply. (a) False (b) True
  14. 14.What does a resistor do? (a) limits the current (b) smooths a wobbly supply (c) beeps for an alarm (d) glows using little power
  15. 15.🧩 Which component beeps for an alarm? (a) potentiometer (b) buzzer (c) diode (d) LED
  16. 16.True or false: a potentiometer blows if current is high. (a) True (b) False
  17. 17.True or false: an LED makes a beeping sound. (a) False (b) True
  18. 18.🧩 Which component stores a little charge? (a) LDR (b) resistor (c) fuse (d) capacitor
  19. 19.True or false: a potentiometer senses how hot it is. (a) False (b) True
  20. 20.🧩 Which component boosts a small signal? (a) capacitor (b) potentiometer (c) transistor (d) thermistor
  21. 21.True or false: a transistor boosts a small signal. (a) True (b) False
  22. 22.What does a capacitor do? (a) limits the current (b) makes a beeping sound (c) makes things spin (d) smooths a wobbly supply
  23. 23.🧩 Which component makes a beeping sound? (a) capacitor (b) buzzer (c) resistor (d) LED
  24. 24.🧩 Which component blows if current is high? (a) capacitor (b) fuse (c) motor (d) LED
  25. 25.🧩 Which component is a resistance knob? (a) diode (b) buzzer (c) potentiometer (d) motor
  26. 26.True or false: a fuse makes a beeping sound. (a) False (b) True
  27. 27.🧩 Which component limits the current? (a) buzzer (b) fuse (c) resistor (d) capacitor
  28. 28.True or false: a capacitor stores a little charge. (a) True (b) False
  29. 29.True or false: a motor limits the current. (a) False (b) True
  30. 30.🧩 Which component lets current go one way? (a) diode (b) fuse (c) LDR (d) potentiometer
  31. 31.What does a capacitor do? (a) stores a little charge (b) senses how hot it is (c) senses how bright it is (d) limits the current
  32. 32.True or false: a motor turns a fan or wheels. (a) False (b) True
  33. 33.What does a transistor do? (a) makes a beeping sound (b) blows if current is high (c) boosts a small signal (d) stores a little charge
  34. 34.What does a thermistor do? (a) smooths a wobbly supply (b) lets current go one way (c) senses how hot it is (d) has coloured bands
  35. 35.True or false: a fuse blows if current is high. (a) True (b) False
  36. 36.What does a buzzer do? (a) glows using little power (b) is a resistance knob (c) beeps for an alarm (d) smooths a wobbly supply
  37. 37.True or false: an LED boosts a small signal. (a) True (b) False
  38. 38.What does a buzzer do? (a) has coloured bands (b) makes a beeping sound (c) stores a little charge (d) makes things spin
  39. 39.🧩 Which component has coloured bands? (a) LED (b) thermistor (c) resistor (d) motor
  40. 40.True or false: a potentiometer boosts a small signal. (a) False (b) True

Answer key

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

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