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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 644 · 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.🧩 A capacitor in a circuit can … (a) make light (b) measure heat (c) spin a wheel (d) store charge briefly
  2. 2.🧩 Which component senses how bright it is? (a) fuse (b) capacitor (c) LDR (d) diode
  3. 3.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a diode (c) a resistor (d) a buzzer
  4. 4.🧩 Which component blows if current is high? (a) resistor (b) potentiometer (c) transistor (d) fuse
  5. 5.True or false: a buzzer lets current go one way. (a) True (b) False
  6. 6.🧩 Which part changes electrical energy into movement? (a) a resistor (b) a fuse (c) a motor (d) an LED
  7. 7.What does a thermistor do? (a) lets current go one way (b) makes things spin (c) glows using little power (d) senses how hot it is
  8. 8.🧩 Which component turns a fan or wheels? (a) LED (b) buzzer (c) motor (d) transistor
  9. 9.What does a resistor do? (a) glows using little power (b) has coloured bands (c) senses how bright it is (d) blows if current is high
  10. 10.True or false: an LDR makes a beeping sound. (a) False (b) True
  11. 11.🧩 Which component makes a beeping sound? (a) LED (b) resistor (c) capacitor (d) buzzer
  12. 12.🧩 Which component has coloured bands? (a) resistor (b) fuse (c) capacitor (d) thermistor
  13. 13.True or false: a potentiometer limits the current. (a) False (b) True
  14. 14.🧩 Which component boosts a small signal? (a) diode (b) LED (c) motor (d) transistor
  15. 15.True or false: a thermistor has coloured bands. (a) False (b) True
  16. 16.True or false: a capacitor smooths a wobbly supply. (a) True (b) False
  17. 17.🧩 Which component limits the current? (a) fuse (b) LDR (c) resistor (d) potentiometer
  18. 18.🧩 Which component senses how hot it is? (a) potentiometer (b) LDR (c) diode (d) thermistor
  19. 19.True or false: a fuse blows if current is high. (a) True (b) False
  20. 20.🧩 Which component lets current go one way? (a) transistor (b) LED (c) diode (d) motor
  21. 21.What does a fuse do? (a) senses how hot it is (b) senses how bright it is (c) limits the current (d) blows if current is high
  22. 22.🧩 Which component stores a little charge? (a) motor (b) resistor (c) capacitor (d) diode
  23. 23.🧩 Which component makes things spin? (a) diode (b) motor (c) fuse (d) buzzer
  24. 24.True or false: a thermistor senses how hot it is. (a) False (b) True
  25. 25.What does a buzzer do? (a) beeps for an alarm (b) makes things spin (c) senses how hot it is (d) blows if current is high
  26. 26.True or false: a potentiometer senses how bright it is. (a) False (b) True
  27. 27.What does a capacitor do? (a) makes a beeping sound (b) glows using little power (c) beeps for an alarm (d) stores a little charge
  28. 28.What does a buzzer do? (a) boosts a small signal (b) lets current go one way (c) makes a beeping sound (d) has coloured bands
  29. 29.What does a capacitor do? (a) makes a beeping sound (b) smooths a wobbly supply (c) boosts a small signal (d) blows if current is high
  30. 30.What does an LDR do? (a) makes things spin (b) turns a fan or wheels (c) limits the current (d) senses how bright it is
  31. 31.True or false: a capacitor makes things spin. (a) True (b) False
  32. 32.🧩 Which component beeps for an alarm? (a) LED (b) resistor (c) fuse (d) buzzer
  33. 33.What does a diode do? (a) limits the current (b) senses how hot it is (c) lets current go one way (d) turns a fan or wheels
  34. 34.True or false: a buzzer beeps for an alarm. (a) False (b) True
  35. 35.True or false: a motor makes things spin. (a) True (b) False
  36. 36.True or false: a fuse senses how hot it is. (a) False (b) True
  37. 37.What does a potentiometer do? (a) stores a little charge (b) is a resistance knob (c) glows using little power (d) lets current go one way
  38. 38.True or false: a capacitor stores a little charge. (a) True (b) False
  39. 39.True or false: a potentiometer lets current go one way. (a) True (b) False
  40. 40.What does a transistor do? (a) blows if current is high (b) boosts a small signal (c) limits the current (d) beeps for an alarm

Answer key

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

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