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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 318 · 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 a diode do? (a) lets current go one way (b) is a resistance knob (c) makes a beeping sound (d) senses how bright it is
  2. 2.True or false: a capacitor smooths a wobbly supply. (a) True (b) False
  3. 3.True or false: a motor limits the current. (a) False (b) True
  4. 4.True or false: a transistor limits the current. (a) True (b) False
  5. 5.True or false: a buzzer beeps for an alarm. (a) False (b) True
  6. 6.🧩 Which part changes electrical energy into movement? (a) a resistor (b) an LED (c) a fuse (d) a motor
  7. 7.True or false: a motor turns a fan or wheels. (a) False (b) True
  8. 8.🧩 Which component limits the current? (a) capacitor (b) resistor (c) LDR (d) motor
  9. 9.True or false: a capacitor is a resistance knob. (a) True (b) False
  10. 10.True or false: a potentiometer makes a beeping sound. (a) False (b) True
  11. 11.True or false: a fuse stores a little charge. (a) False (b) True
  12. 12.🧩 Which component senses how hot it is? (a) potentiometer (b) resistor (c) thermistor (d) fuse
  13. 13.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a diode (c) a buzzer (d) a capacitor
  14. 14.True or false: a buzzer makes a beeping sound. (a) False (b) True
  15. 15.True or false: a potentiometer is a resistance knob. (a) True (b) False
  16. 16.What does an LED do? (a) limits the current (b) glows using little power (c) senses how hot it is (d) boosts a small signal
  17. 17.What does a resistor do? (a) limits the current (b) boosts a small signal (c) glows using little power (d) smooths a wobbly supply
  18. 18.True or false: a capacitor makes a beeping sound. (a) False (b) True
  19. 19.🧩 A capacitor in a circuit can … (a) store charge briefly (b) make light (c) measure heat (d) spin a wheel
  20. 20.What does a potentiometer do? (a) stores a little charge (b) makes a beeping sound (c) is a resistance knob (d) lets current go one way
  21. 21.What does an LDR do? (a) makes a beeping sound (b) boosts a small signal (c) senses how bright it is (d) smooths a wobbly supply
  22. 22.True or false: a thermistor blows if current is high. (a) True (b) False
  23. 23.🧩 Which component stores a little charge? (a) LED (b) motor (c) capacitor (d) LDR
  24. 24.🧩 Which component boosts a small signal? (a) motor (b) LDR (c) resistor (d) transistor
  25. 25.🧩 Which component blows if current is high? (a) buzzer (b) thermistor (c) fuse (d) resistor
  26. 26.What does a thermistor do? (a) boosts a small signal (b) beeps for an alarm (c) senses how hot it is (d) blows if current is high
  27. 27.🧩 Which component makes a beeping sound? (a) buzzer (b) diode (c) LED (d) resistor
  28. 28.What does a motor do? (a) makes a beeping sound (b) turns a fan or wheels (c) senses how bright it is (d) senses how hot it is
  29. 29.True or false: a buzzer has coloured bands. (a) True (b) False
  30. 30.True or false: an LDR senses how bright it is. (a) False (b) True
  31. 31.🧩 Which component lets current go one way? (a) potentiometer (b) fuse (c) diode (d) buzzer
  32. 32.🧩 Which component smooths a wobbly supply? (a) resistor (b) capacitor (c) potentiometer (d) buzzer
  33. 33.🧩 Which component senses how bright it is? (a) fuse (b) buzzer (c) LED (d) LDR
  34. 34.What does a transistor do? (a) senses how hot it is (b) senses how bright it is (c) boosts a small signal (d) smooths a wobbly supply
  35. 35.True or false: a motor senses how hot it is. (a) True (b) False
  36. 36.What does a buzzer do? (a) boosts a small signal (b) smooths a wobbly supply (c) makes a beeping sound (d) has coloured bands
  37. 37.True or false: a transistor senses how bright it is. (a) True (b) False
  38. 38.What does a resistor do? (a) lets current go one way (b) senses how hot it is (c) has coloured bands (d) makes a beeping sound
  39. 39.True or false: a thermistor beeps for an alarm. (a) True (b) False
  40. 40.🧩 Which component glows using little power? (a) thermistor (b) motor (c) LED (d) capacitor

Answer key

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

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