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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 422 · 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.🧩 Which part changes electrical energy into movement? (a) a resistor (b) a fuse (c) an LED (d) a motor
  2. 2.🧩 Which component glows using little power? (a) capacitor (b) buzzer (c) fuse (d) LED
  3. 3.True or false: a resistor limits the current. (a) False (b) True
  4. 4.True or false: a potentiometer has coloured bands. (a) True (b) False
  5. 5.What does a potentiometer do? (a) turns a fan or wheels (b) has coloured bands (c) senses how hot it is (d) is a resistance knob
  6. 6.🧩 Which component limits the current? (a) LED (b) resistor (c) diode (d) transistor
  7. 7.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a capacitor (c) a buzzer (d) a diode
  8. 8.What does an LDR do? (a) senses how bright it is (b) boosts a small signal (c) has coloured bands (d) turns a fan or wheels
  9. 9.🧩 Which component has coloured bands? (a) capacitor (b) transistor (c) buzzer (d) resistor
  10. 10.🧩 A capacitor in a circuit can … (a) spin a wheel (b) store charge briefly (c) make light (d) measure heat
  11. 11.What does a resistor do? (a) lets current go one way (b) beeps for an alarm (c) limits the current (d) stores a little charge
  12. 12.What does a buzzer do? (a) smooths a wobbly supply (b) turns a fan or wheels (c) stores a little charge (d) makes a beeping sound
  13. 13.True or false: a diode is a resistance knob. (a) False (b) True
  14. 14.True or false: a motor beeps for an alarm. (a) True (b) False
  15. 15.True or false: a diode lets current go one way. (a) True (b) False
  16. 16.True or false: an LDR makes things spin. (a) False (b) True
  17. 17.True or false: a capacitor beeps for an alarm. (a) False (b) True
  18. 18.True or false: a motor turns a fan or wheels. (a) True (b) False
  19. 19.True or false: a fuse blows if current is high. (a) False (b) True
  20. 20.True or false: a fuse boosts a small signal. (a) False (b) True
  21. 21.🧩 Which component blows if current is high? (a) fuse (b) capacitor (c) motor (d) potentiometer
  22. 22.🧩 Which component turns a fan or wheels? (a) motor (b) potentiometer (c) resistor (d) LDR
  23. 23.🧩 Which component lets current go one way? (a) capacitor (b) diode (c) buzzer (d) resistor
  24. 24.True or false: a fuse senses how hot it is. (a) False (b) True
  25. 25.What does a motor do? (a) blows if current is high (b) senses how bright it is (c) makes a beeping sound (d) turns a fan or wheels
  26. 26.True or false: an LED makes a beeping sound. (a) True (b) False
  27. 27.🧩 Which component senses how hot it is? (a) buzzer (b) thermistor (c) diode (d) potentiometer
  28. 28.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
  29. 29.🧩 Which component makes a beeping sound? (a) buzzer (b) capacitor (c) fuse (d) LED
  30. 30.What does a transistor do? (a) limits the current (b) boosts a small signal (c) stores a little charge (d) makes things spin
  31. 31.True or false: an LED blows if current is high. (a) False (b) True
  32. 32.True or false: an LDR senses how bright it is. (a) False (b) True
  33. 33.True or false: an LED glows using little power. (a) True (b) False
  34. 34.🧩 Which component stores a little charge? (a) capacitor (b) potentiometer (c) buzzer (d) LED
  35. 35.What does a diode do? (a) lets current go one way (b) blows if current is high (c) glows using little power (d) has coloured bands
  36. 36.🧩 Which component smooths a wobbly supply? (a) buzzer (b) capacitor (c) transistor (d) thermistor
  37. 37.🧩 Which component senses how bright it is? (a) LED (b) capacitor (c) LDR (d) potentiometer
  38. 38.What does an LED do? (a) glows using little power (b) stores a little charge (c) blows if current is high (d) is a resistance knob
  39. 39.True or false: a transistor senses how hot it is. (a) True (b) False
  40. 40.True or false: a buzzer makes a beeping sound. (a) False (b) True

Answer key

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

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