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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 459 · 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 thermistor do? (a) senses how hot it is (b) makes things spin (c) limits the current (d) makes a beeping sound
  2. 2.True or false: a fuse smooths a wobbly supply. (a) False (b) True
  3. 3.True or false: a motor makes things spin. (a) False (b) True
  4. 4.What does a potentiometer do? (a) lets current go one way (b) is a resistance knob (c) makes things spin (d) boosts a small signal
  5. 5.🧩 Which component smooths a wobbly supply? (a) capacitor (b) LED (c) potentiometer (d) thermistor
  6. 6.🧩 Which part changes electrical energy into movement? (a) an LED (b) a resistor (c) a fuse (d) a motor
  7. 7.🧩 Which component blows if current is high? (a) transistor (b) buzzer (c) fuse (d) motor
  8. 8.🧩 A capacitor in a circuit can … (a) spin a wheel (b) measure heat (c) store charge briefly (d) make light
  9. 9.🧩 Which component boosts a small signal? (a) potentiometer (b) resistor (c) thermistor (d) transistor
  10. 10.True or false: a motor blows if current is high. (a) True (b) False
  11. 11.🧩 Which part changes electrical energy into sound? (a) a buzzer (b) a diode (c) a capacitor (d) a resistor
  12. 12.What does a motor do? (a) lets current go one way (b) beeps for an alarm (c) turns a fan or wheels (d) smooths a wobbly supply
  13. 13.🧩 Which component stores a little charge? (a) potentiometer (b) capacitor (c) LDR (d) resistor
  14. 14.What does a diode do? (a) has coloured bands (b) blows if current is high (c) lets current go one way (d) senses how hot it is
  15. 15.True or false: a fuse blows if current is high. (a) True (b) False
  16. 16.True or false: a potentiometer glows using little power. (a) True (b) False
  17. 17.🧩 Which component glows using little power? (a) potentiometer (b) resistor (c) transistor (d) LED
  18. 18.True or false: a buzzer makes a beeping sound. (a) False (b) True
  19. 19.🧩 Which component limits the current? (a) motor (b) resistor (c) diode (d) transistor
  20. 20.True or false: a buzzer smooths a wobbly supply. (a) True (b) False
  21. 21.True or false: a diode lets current go one way. (a) False (b) True
  22. 22.True or false: an LED limits the current. (a) False (b) True
  23. 23.True or false: a diode makes things spin. (a) False (b) True
  24. 24.True or false: a potentiometer is a resistance knob. (a) True (b) False
  25. 25.What does a fuse do? (a) smooths a wobbly supply (b) senses how bright it is (c) blows if current is high (d) beeps for an alarm
  26. 26.🧩 Which component senses how hot it is? (a) fuse (b) buzzer (c) thermistor (d) transistor
  27. 27.True or false: a buzzer blows if current is high. (a) False (b) True
  28. 28.True or false: a diode beeps for an alarm. (a) False (b) True
  29. 29.True or false: an LDR is a resistance knob. (a) True (b) False
  30. 30.🧩 Which component is a resistance knob? (a) LDR (b) capacitor (c) potentiometer (d) thermistor
  31. 31.🧩 Which component turns a fan or wheels? (a) resistor (b) LDR (c) buzzer (d) motor
  32. 32.What does a buzzer do? (a) makes a beeping sound (b) lets current go one way (c) turns a fan or wheels (d) has coloured bands
  33. 33.🧩 Which component lets current go one way? (a) buzzer (b) diode (c) capacitor (d) fuse
  34. 34.True or false: an LDR stores a little charge. (a) False (b) True
  35. 35.What does a capacitor do? (a) senses how bright it is (b) smooths a wobbly supply (c) turns a fan or wheels (d) senses how hot it is
  36. 36.What does a transistor do? (a) boosts a small signal (b) is a resistance knob (c) senses how hot it is (d) blows if current is high
  37. 37.True or false: a buzzer beeps for an alarm. (a) False (b) True
  38. 38.True or false: a motor limits the current. (a) True (b) False
  39. 39.🧩 Which component makes a beeping sound? (a) capacitor (b) thermistor (c) buzzer (d) potentiometer
  40. 40.🧩 Which component has coloured bands? (a) resistor (b) capacitor (c) thermistor (d) motor

Answer key

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

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