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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 423 · 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 capacitor stores a little charge. (a) False (b) True
  2. 2.True or false: a thermistor senses how bright it is. (a) True (b) False
  3. 3.🧩 A capacitor in a circuit can … (a) measure heat (b) spin a wheel (c) store charge briefly (d) make light
  4. 4.What does a diode do? (a) boosts a small signal (b) makes a beeping sound (c) limits the current (d) lets current go one way
  5. 5.🧩 Which component beeps for an alarm? (a) fuse (b) motor (c) LED (d) buzzer
  6. 6.🧩 Which component limits the current? (a) capacitor (b) LDR (c) LED (d) resistor
  7. 7.What does a capacitor do? (a) makes things spin (b) makes a beeping sound (c) beeps for an alarm (d) stores a little charge
  8. 8.What does a transistor do? (a) has coloured bands (b) senses how hot it is (c) boosts a small signal (d) makes things spin
  9. 9.🧩 Which component senses how hot it is? (a) thermistor (b) LDR (c) transistor (d) potentiometer
  10. 10.True or false: a buzzer glows using little power. (a) False (b) True
  11. 11.🧩 Which part changes electrical energy into movement? (a) a fuse (b) a motor (c) an LED (d) a resistor
  12. 12.What does an LED do? (a) has coloured bands (b) glows using little power (c) beeps for an alarm (d) limits the current
  13. 13.What does a buzzer do? (a) blows if current is high (b) senses how bright it is (c) beeps for an alarm (d) lets current go one way
  14. 14.True or false: a potentiometer senses how hot it is. (a) True (b) False
  15. 15.True or false: a resistor has coloured bands. (a) True (b) False
  16. 16.True or false: an LDR senses how bright it is. (a) False (b) True
  17. 17.True or false: a potentiometer has coloured bands. (a) False (b) True
  18. 18.🧩 Which component is a resistance knob? (a) motor (b) capacitor (c) buzzer (d) potentiometer
  19. 19.🧩 Which component makes a beeping sound? (a) buzzer (b) capacitor (c) LDR (d) transistor
  20. 20.🧩 Which component makes things spin? (a) LDR (b) motor (c) fuse (d) thermistor
  21. 21.🧩 Which part changes electrical energy into sound? (a) a buzzer (b) a resistor (c) a capacitor (d) a diode
  22. 22.What does a fuse do? (a) smooths a wobbly supply (b) senses how hot it is (c) lets current go one way (d) blows if current is high
  23. 23.True or false: a fuse turns a fan or wheels. (a) True (b) False
  24. 24.What does a motor do? (a) has coloured bands (b) lets current go one way (c) glows using little power (d) makes things spin
  25. 25.What does a capacitor do? (a) boosts a small signal (b) senses how hot it is (c) smooths a wobbly supply (d) blows if current is high
  26. 26.🧩 Which component stores a little charge? (a) motor (b) LED (c) capacitor (d) transistor
  27. 27.True or false: a buzzer beeps for an alarm. (a) True (b) False
  28. 28.What does an LDR do? (a) lets current go one way (b) stores a little charge (c) makes things spin (d) senses how bright it is
  29. 29.🧩 Which component has coloured bands? (a) motor (b) transistor (c) thermistor (d) resistor
  30. 30.What does a potentiometer do? (a) makes a beeping sound (b) smooths a wobbly supply (c) is a resistance knob (d) senses how bright it is
  31. 31.True or false: a potentiometer beeps for an alarm. (a) False (b) True
  32. 32.True or false: a diode makes a beeping sound. (a) True (b) False
  33. 33.🧩 Which component turns a fan or wheels? (a) diode (b) capacitor (c) motor (d) transistor
  34. 34.True or false: an LED senses how hot it is. (a) True (b) False
  35. 35.🧩 Which component lets current go one way? (a) thermistor (b) capacitor (c) diode (d) buzzer
  36. 36.🧩 Which component smooths a wobbly supply? (a) capacitor (b) potentiometer (c) diode (d) buzzer
  37. 37.🧩 Which component glows using little power? (a) potentiometer (b) fuse (c) LED (d) capacitor
  38. 38.True or false: a fuse beeps for an alarm. (a) False (b) True
  39. 39.True or false: a fuse blows if current is high. (a) True (b) False
  40. 40.What does a thermistor do? (a) senses how bright it is (b) is a resistance knob (c) senses how hot it is (d) glows using little power

Answer key

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

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