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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 561 · 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) lets current go one way (b) smooths a wobbly supply (c) makes a beeping sound (d) glows using little power
  2. 2.True or false: a motor makes a beeping sound. (a) False (b) True
  3. 3.True or false: a potentiometer stores a little charge. (a) True (b) False
  4. 4.🧩 Which component has coloured bands? (a) capacitor (b) transistor (c) resistor (d) diode
  5. 5.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a buzzer (c) a resistor (d) a diode
  6. 6.True or false: a potentiometer has coloured bands. (a) False (b) True
  7. 7.🧩 Which part changes electrical energy into movement? (a) a fuse (b) a resistor (c) a motor (d) an LED
  8. 8.True or false: a capacitor stores a little charge. (a) True (b) False
  9. 9.What does a potentiometer do? (a) stores a little charge (b) has coloured bands (c) is a resistance knob (d) glows using little power
  10. 10.True or false: a buzzer makes a beeping sound. (a) False (b) True
  11. 11.🧩 A capacitor in a circuit can … (a) measure heat (b) store charge briefly (c) spin a wheel (d) make light
  12. 12.🧩 Which component makes things spin? (a) motor (b) buzzer (c) resistor (d) fuse
  13. 13.True or false: a potentiometer is a resistance knob. (a) False (b) True
  14. 14.True or false: an LDR limits the current. (a) True (b) False
  15. 15.What does a diode do? (a) lets current go one way (b) makes things spin (c) smooths a wobbly supply (d) turns a fan or wheels
  16. 16.🧩 Which component turns a fan or wheels? (a) LDR (b) potentiometer (c) motor (d) buzzer
  17. 17.True or false: a resistor has coloured bands. (a) False (b) True
  18. 18.🧩 Which component glows using little power? (a) potentiometer (b) LED (c) buzzer (d) LDR
  19. 19.🧩 Which component senses how bright it is? (a) diode (b) fuse (c) motor (d) LDR
  20. 20.🧩 Which component beeps for an alarm? (a) thermistor (b) LED (c) LDR (d) buzzer
  21. 21.🧩 Which component lets current go one way? (a) transistor (b) resistor (c) capacitor (d) diode
  22. 22.What does a transistor do? (a) lets current go one way (b) is a resistance knob (c) senses how hot it is (d) boosts a small signal
  23. 23.True or false: an LDR smooths a wobbly supply. (a) True (b) False
  24. 24.True or false: a capacitor makes things spin. (a) True (b) False
  25. 25.What does a capacitor do? (a) senses how bright it is (b) limits the current (c) stores a little charge (d) has coloured bands
  26. 26.🧩 Which component smooths a wobbly supply? (a) resistor (b) LDR (c) capacitor (d) diode
  27. 27.True or false: a transistor smooths a wobbly supply. (a) True (b) False
  28. 28.What does a resistor do? (a) lets current go one way (b) glows using little power (c) boosts a small signal (d) limits the current
  29. 29.True or false: a diode beeps for an alarm. (a) False (b) True
  30. 30.True or false: a buzzer beeps for an alarm. (a) False (b) True
  31. 31.🧩 Which component is a resistance knob? (a) transistor (b) LDR (c) potentiometer (d) capacitor
  32. 32.🧩 Which component makes a beeping sound? (a) potentiometer (b) buzzer (c) resistor (d) thermistor
  33. 33.🧩 Which component limits the current? (a) diode (b) capacitor (c) motor (d) resistor
  34. 34.True or false: a capacitor glows using little power. (a) True (b) False
  35. 35.What does an LDR do? (a) boosts a small signal (b) glows using little power (c) senses how bright it is (d) blows if current is high
  36. 36.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
  37. 37.True or false: a thermistor senses how hot it is. (a) False (b) True
  38. 38.🧩 Which component stores a little charge? (a) resistor (b) fuse (c) capacitor (d) transistor
  39. 39.True or false: a resistor limits the current. (a) False (b) True
  40. 40.True or false: an LDR blows if current is high. (a) True (b) False

Answer key

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

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