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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 649 · 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.🧩 Which component stores a little charge? (a) fuse (b) thermistor (c) resistor (d) capacitor
  2. 2.What does a capacitor do? (a) boosts a small signal (b) blows if current is high (c) makes a beeping sound (d) smooths a wobbly supply
  3. 3.🧩 Which component senses how hot it is? (a) thermistor (b) capacitor (c) motor (d) diode
  4. 4.🧩 Which component turns a fan or wheels? (a) potentiometer (b) capacitor (c) motor (d) buzzer
  5. 5.🧩 Which component makes things spin? (a) thermistor (b) transistor (c) buzzer (d) motor
  6. 6.What does a resistor do? (a) limits the current (b) turns a fan or wheels (c) is a resistance knob (d) makes a beeping sound
  7. 7.What does a buzzer do? (a) makes a beeping sound (b) smooths a wobbly supply (c) makes things spin (d) stores a little charge
  8. 8.🧩 Which component makes a beeping sound? (a) LED (b) fuse (c) buzzer (d) diode
  9. 9.🧩 Which component has coloured bands? (a) diode (b) motor (c) capacitor (d) resistor
  10. 10.True or false: a potentiometer stores a little charge. (a) True (b) False
  11. 11.What does a fuse do? (a) stores a little charge (b) blows if current is high (c) smooths a wobbly supply (d) is a resistance knob
  12. 12.True or false: a potentiometer glows using little power. (a) True (b) False
  13. 13.🧩 Which component limits the current? (a) resistor (b) motor (c) potentiometer (d) LED
  14. 14.🧩 Which part changes electrical energy into movement? (a) a fuse (b) an LED (c) a resistor (d) a motor
  15. 15.True or false: a capacitor senses how bright it is. (a) False (b) True
  16. 16.True or false: a potentiometer has coloured bands. (a) False (b) True
  17. 17.What does a transistor do? (a) senses how bright it is (b) boosts a small signal (c) makes things spin (d) turns a fan or wheels
  18. 18.🧩 A capacitor in a circuit can … (a) make light (b) measure heat (c) spin a wheel (d) store charge briefly
  19. 19.True or false: an LDR is a resistance knob. (a) True (b) False
  20. 20.🧩 Which component senses how bright it is? (a) LDR (b) buzzer (c) fuse (d) transistor
  21. 21.What does a capacitor do? (a) stores a little charge (b) boosts a small signal (c) glows using little power (d) beeps for an alarm
  22. 22.🧩 Which component beeps for an alarm? (a) motor (b) resistor (c) thermistor (d) buzzer
  23. 23.What does a buzzer do? (a) limits the current (b) beeps for an alarm (c) senses how bright it is (d) has coloured bands
  24. 24.What does a motor do? (a) blows if current is high (b) has coloured bands (c) glows using little power (d) makes things spin
  25. 25.What does a motor do? (a) stores a little charge (b) turns a fan or wheels (c) senses how bright it is (d) glows using little power
  26. 26.🧩 Which component lets current go one way? (a) diode (b) capacitor (c) buzzer (d) potentiometer
  27. 27.🧩 Which part changes electrical energy into sound? (a) a diode (b) a buzzer (c) a resistor (d) a capacitor
  28. 28.True or false: an LED limits the current. (a) False (b) True
  29. 29.True or false: a motor blows if current is high. (a) False (b) True
  30. 30.True or false: a buzzer beeps for an alarm. (a) True (b) False
  31. 31.True or false: a fuse senses how hot it is. (a) False (b) True
  32. 32.True or false: a fuse stores a little charge. (a) True (b) False
  33. 33.True or false: an LED glows using little power. (a) False (b) True
  34. 34.True or false: a motor makes things spin. (a) False (b) True
  35. 35.🧩 Which component blows if current is high? (a) diode (b) fuse (c) motor (d) resistor
  36. 36.What does a resistor do? (a) has coloured bands (b) senses how bright it is (c) glows using little power (d) makes things spin
  37. 37.🧩 Which component boosts a small signal? (a) transistor (b) diode (c) LED (d) LDR
  38. 38.True or false: an LED makes a beeping sound. (a) False (b) True
  39. 39.True or false: a thermistor senses how hot it is. (a) True (b) False
  40. 40.True or false: a capacitor beeps for an alarm. (a) False (b) True

Answer key

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

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