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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 659 · 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.🧩 A capacitor in a circuit can … (a) store charge briefly (b) measure heat (c) make light (d) spin a wheel
  2. 2.🧩 Which component limits the current? (a) motor (b) fuse (c) resistor (d) capacitor
  3. 3.🧩 Which component glows using little power? (a) buzzer (b) LDR (c) diode (d) LED
  4. 4.🧩 Which component senses how bright it is? (a) fuse (b) resistor (c) LDR (d) capacitor
  5. 5.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a diode (c) a buzzer (d) a capacitor
  6. 6.What does a potentiometer do? (a) stores a little charge (b) limits the current (c) is a resistance knob (d) senses how hot it is
  7. 7.What does a thermistor do? (a) beeps for an alarm (b) makes a beeping sound (c) senses how hot it is (d) limits the current
  8. 8.True or false: a resistor has coloured bands. (a) True (b) False
  9. 9.True or false: an LED beeps for an alarm. (a) True (b) False
  10. 10.🧩 Which component smooths a wobbly supply? (a) transistor (b) LDR (c) capacitor (d) thermistor
  11. 11.🧩 Which component is a resistance knob? (a) capacitor (b) thermistor (c) potentiometer (d) resistor
  12. 12.🧩 Which part changes electrical energy into movement? (a) a resistor (b) a motor (c) a fuse (d) an LED
  13. 13.What does a buzzer do? (a) makes a beeping sound (b) has coloured bands (c) is a resistance knob (d) makes things spin
  14. 14.True or false: an LDR glows using little power. (a) True (b) False
  15. 15.🧩 Which component stores a little charge? (a) capacitor (b) transistor (c) motor (d) resistor
  16. 16.True or false: a buzzer beeps for an alarm. (a) False (b) True
  17. 17.What does a diode do? (a) lets current go one way (b) blows if current is high (c) senses how bright it is (d) senses how hot it is
  18. 18.What does an LED do? (a) limits the current (b) makes a beeping sound (c) glows using little power (d) makes things spin
  19. 19.What does a capacitor do? (a) boosts a small signal (b) turns a fan or wheels (c) senses how hot it is (d) smooths a wobbly supply
  20. 20.True or false: a buzzer lets current go one way. (a) False (b) True
  21. 21.What does a fuse do? (a) blows if current is high (b) has coloured bands (c) glows using little power (d) makes a beeping sound
  22. 22.🧩 Which component lets current go one way? (a) capacitor (b) LDR (c) fuse (d) diode
  23. 23.True or false: a resistor limits the current. (a) True (b) False
  24. 24.True or false: a fuse stores a little charge. (a) False (b) True
  25. 25.True or false: a motor turns a fan or wheels. (a) True (b) False
  26. 26.What does an LDR do? (a) lets current go one way (b) blows if current is high (c) senses how bright it is (d) smooths a wobbly supply
  27. 27.True or false: a potentiometer is a resistance knob. (a) False (b) True
  28. 28.What does a buzzer do? (a) boosts a small signal (b) glows using little power (c) beeps for an alarm (d) blows if current is high
  29. 29.True or false: a capacitor limits the current. (a) True (b) False
  30. 30.True or false: a thermistor is a resistance knob. (a) False (b) True
  31. 31.True or false: a motor has coloured bands. (a) True (b) False
  32. 32.What does a capacitor do? (a) senses how bright it is (b) stores a little charge (c) boosts a small signal (d) lets current go one way
  33. 33.True or false: a potentiometer glows using little power. (a) False (b) True
  34. 34.True or false: an LDR makes a beeping sound. (a) False (b) True
  35. 35.True or false: an LED glows using little power. (a) True (b) False
  36. 36.🧩 Which component senses how hot it is? (a) LED (b) thermistor (c) buzzer (d) fuse
  37. 37.🧩 Which component makes things spin? (a) capacitor (b) motor (c) LDR (d) potentiometer
  38. 38.True or false: a diode lets current go one way. (a) False (b) True
  39. 39.True or false: a fuse blows if current is high. (a) False (b) True
  40. 40.True or false: a fuse smooths a wobbly supply. (a) False (b) True

Answer key

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

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