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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 127 · 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: a thermistor senses how bright it is. (a) True (b) False
  2. 2.🧩 Which component lets current go one way? (a) diode (b) motor (c) LED (d) LDR
  3. 3.True or false: an LDR makes a beeping sound. (a) False (b) True
  4. 4.🧩 Which component stores a little charge? (a) LED (b) LDR (c) capacitor (d) buzzer
  5. 5.True or false: a buzzer makes a beeping sound. (a) False (b) True
  6. 6.🧩 Which part changes electrical energy into movement? (a) an LED (b) a motor (c) a fuse (d) a resistor
  7. 7.🧩 Which component is a resistance knob? (a) motor (b) transistor (c) buzzer (d) potentiometer
  8. 8.What does a diode do? (a) lets current go one way (b) has coloured bands (c) makes a beeping sound (d) blows if current is high
  9. 9.True or false: a buzzer beeps for an alarm. (a) True (b) False
  10. 10.🧩 A capacitor in a circuit can … (a) measure heat (b) spin a wheel (c) make light (d) store charge briefly
  11. 11.True or false: a diode senses how hot it is. (a) True (b) False
  12. 12.True or false: a potentiometer senses how hot it is. (a) True (b) False
  13. 13.What does a capacitor do? (a) blows if current is high (b) smooths a wobbly supply (c) has coloured bands (d) glows using little power
  14. 14.🧩 Which part changes electrical energy into sound? (a) a diode (b) a capacitor (c) a buzzer (d) a resistor
  15. 15.🧩 Which component limits the current? (a) thermistor (b) resistor (c) diode (d) LDR
  16. 16.True or false: a resistor has coloured bands. (a) True (b) False
  17. 17.True or false: a resistor limits the current. (a) False (b) True
  18. 18.True or false: a diode makes things spin. (a) False (b) True
  19. 19.What does a thermistor do? (a) senses how hot it is (b) has coloured bands (c) makes things spin (d) senses how bright it is
  20. 20.🧩 Which component makes a beeping sound? (a) buzzer (b) capacitor (c) transistor (d) motor
  21. 21.What does a buzzer do? (a) smooths a wobbly supply (b) turns a fan or wheels (c) senses how bright it is (d) beeps for an alarm
  22. 22.🧩 Which component senses how bright it is? (a) buzzer (b) resistor (c) LED (d) LDR
  23. 23.🧩 Which component turns a fan or wheels? (a) motor (b) transistor (c) resistor (d) fuse
  24. 24.True or false: a motor turns a fan or wheels. (a) True (b) False
  25. 25.🧩 Which component glows using little power? (a) capacitor (b) LED (c) buzzer (d) motor
  26. 26.🧩 Which component makes things spin? (a) fuse (b) buzzer (c) capacitor (d) motor
  27. 27.True or false: a diode glows using little power. (a) True (b) False
  28. 28.True or false: a diode lets current go one way. (a) False (b) True
  29. 29.True or false: an LED senses how bright it is. (a) False (b) True
  30. 30.True or false: an LDR blows if current is high. (a) True (b) False
  31. 31.True or false: a fuse has coloured bands. (a) True (b) False
  32. 32.True or false: a transistor smooths a wobbly supply. (a) True (b) False
  33. 33.What does a resistor do? (a) limits the current (b) turns a fan or wheels (c) is a resistance knob (d) glows using little power
  34. 34.What does a fuse do? (a) beeps for an alarm (b) blows if current is high (c) limits the current (d) smooths a wobbly supply
  35. 35.🧩 Which component blows if current is high? (a) fuse (b) transistor (c) buzzer (d) LDR
  36. 36.What does a motor do? (a) limits the current (b) senses how hot it is (c) makes things spin (d) is a resistance knob
  37. 37.What does an LDR do? (a) has coloured bands (b) beeps for an alarm (c) makes a beeping sound (d) senses how bright it is
  38. 38.🧩 Which component beeps for an alarm? (a) fuse (b) LED (c) capacitor (d) buzzer
  39. 39.🧩 Which component has coloured bands? (a) diode (b) fuse (c) resistor (d) thermistor
  40. 40.True or false: a capacitor stores a little charge. (a) False (b) True

Answer key

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

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