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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 304 · 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: an LED glows using little power. (a) False (b) True
  2. 2.What does a diode do? (a) beeps for an alarm (b) lets current go one way (c) limits the current (d) smooths a wobbly supply
  3. 3.True or false: a diode limits the current. (a) False (b) True
  4. 4.True or false: a diode lets current go one way. (a) True (b) False
  5. 5.🧩 Which component makes a beeping sound? (a) LDR (b) resistor (c) capacitor (d) buzzer
  6. 6.🧩 Which component blows if current is high? (a) transistor (b) fuse (c) potentiometer (d) capacitor
  7. 7.True or false: a buzzer beeps for an alarm. (a) True (b) False
  8. 8.🧩 A capacitor in a circuit can … (a) make light (b) spin a wheel (c) measure heat (d) store charge briefly
  9. 9.🧩 Which part changes electrical energy into movement? (a) a fuse (b) a motor (c) a resistor (d) an LED
  10. 10.🧩 Which component limits the current? (a) resistor (b) capacitor (c) motor (d) transistor
  11. 11.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a buzzer (c) a diode (d) a resistor
  12. 12.What does an LED do? (a) lets current go one way (b) glows using little power (c) smooths a wobbly supply (d) senses how hot it is
  13. 13.True or false: a buzzer makes a beeping sound. (a) True (b) False
  14. 14.🧩 Which component senses how bright it is? (a) motor (b) LDR (c) potentiometer (d) buzzer
  15. 15.True or false: an LDR makes a beeping sound. (a) False (b) True
  16. 16.What does a motor do? (a) senses how hot it is (b) boosts a small signal (c) makes a beeping sound (d) makes things spin
  17. 17.What does an LDR do? (a) blows if current is high (b) senses how bright it is (c) makes things spin (d) makes a beeping sound
  18. 18.What does a thermistor do? (a) lets current go one way (b) glows using little power (c) senses how hot it is (d) senses how bright it is
  19. 19.True or false: a diode turns a fan or wheels. (a) True (b) False
  20. 20.True or false: a fuse turns a fan or wheels. (a) True (b) False
  21. 21.True or false: a buzzer turns a fan or wheels. (a) False (b) True
  22. 22.What does a motor do? (a) senses how bright it is (b) lets current go one way (c) makes a beeping sound (d) turns a fan or wheels
  23. 23.True or false: a potentiometer is a resistance knob. (a) False (b) True
  24. 24.True or false: a transistor limits the current. (a) True (b) False
  25. 25.True or false: a fuse blows if current is high. (a) False (b) True
  26. 26.True or false: a capacitor makes a beeping sound. (a) False (b) True
  27. 27.What does a resistor do? (a) turns a fan or wheels (b) glows using little power (c) stores a little charge (d) has coloured bands
  28. 28.What does a buzzer do? (a) stores a little charge (b) smooths a wobbly supply (c) senses how bright it is (d) makes a beeping sound
  29. 29.True or false: a resistor has coloured bands. (a) False (b) True
  30. 30.🧩 Which component boosts a small signal? (a) motor (b) capacitor (c) transistor (d) fuse
  31. 31.What does a buzzer do? (a) glows using little power (b) beeps for an alarm (c) makes things spin (d) stores a little charge
  32. 32.What does a potentiometer do? (a) makes a beeping sound (b) blows if current is high (c) senses how hot it is (d) is a resistance knob
  33. 33.🧩 Which component smooths a wobbly supply? (a) potentiometer (b) resistor (c) capacitor (d) motor
  34. 34.True or false: a motor turns a fan or wheels. (a) False (b) True
  35. 35.True or false: a thermistor senses how hot it is. (a) True (b) False
  36. 36.🧩 Which component lets current go one way? (a) resistor (b) LED (c) diode (d) thermistor
  37. 37.True or false: a motor makes things spin. (a) False (b) True
  38. 38.True or false: a resistor limits the current. (a) True (b) False
  39. 39.True or false: a transistor has coloured bands. (a) False (b) True
  40. 40.🧩 Which component glows using little power? (a) diode (b) capacitor (c) motor (d) LED

Answer key

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

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