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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 257 · 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 part changes electrical energy into sound? (a) a diode (b) a buzzer (c) a resistor (d) a capacitor
  2. 2.🧩 Which component turns a fan or wheels? (a) potentiometer (b) resistor (c) motor (d) transistor
  3. 3.What does a buzzer do? (a) senses how hot it is (b) senses how bright it is (c) makes a beeping sound (d) has coloured bands
  4. 4.True or false: a capacitor stores a little charge. (a) False (b) True
  5. 5.What does an LDR do? (a) senses how bright it is (b) boosts a small signal (c) lets current go one way (d) beeps for an alarm
  6. 6.What does a resistor do? (a) glows using little power (b) has coloured bands (c) beeps for an alarm (d) smooths a wobbly supply
  7. 7.What does a transistor do? (a) boosts a small signal (b) stores a little charge (c) limits the current (d) blows if current is high
  8. 8.True or false: an LED glows using little power. (a) False (b) True
  9. 9.🧩 A capacitor in a circuit can … (a) make light (b) measure heat (c) spin a wheel (d) store charge briefly
  10. 10.🧩 Which component makes things spin? (a) buzzer (b) resistor (c) diode (d) motor
  11. 11.True or false: a motor smooths a wobbly supply. (a) True (b) False
  12. 12.🧩 Which component makes a beeping sound? (a) resistor (b) buzzer (c) thermistor (d) LED
  13. 13.🧩 Which component lets current go one way? (a) diode (b) resistor (c) capacitor (d) buzzer
  14. 14.🧩 Which component beeps for an alarm? (a) resistor (b) buzzer (c) capacitor (d) fuse
  15. 15.🧩 Which component smooths a wobbly supply? (a) buzzer (b) capacitor (c) LED (d) potentiometer
  16. 16.True or false: a capacitor boosts a small signal. (a) False (b) True
  17. 17.True or false: an LDR glows using little power. (a) False (b) True
  18. 18.True or false: a motor stores a little charge. (a) False (b) True
  19. 19.True or false: a potentiometer senses how hot it is. (a) False (b) True
  20. 20.True or false: a motor makes things spin. (a) False (b) True
  21. 21.True or false: an LED makes things spin. (a) False (b) True
  22. 22.What does a capacitor do? (a) has coloured bands (b) turns a fan or wheels (c) beeps for an alarm (d) stores a little charge
  23. 23.🧩 Which part changes electrical energy into movement? (a) a motor (b) a fuse (c) an LED (d) a resistor
  24. 24.True or false: a fuse limits the current. (a) False (b) True
  25. 25.🧩 Which component has coloured bands? (a) LED (b) LDR (c) transistor (d) resistor
  26. 26.🧩 Which component stores a little charge? (a) LED (b) fuse (c) capacitor (d) buzzer
  27. 27.True or false: an LDR beeps for an alarm. (a) True (b) False
  28. 28.What does a fuse do? (a) blows if current is high (b) smooths a wobbly supply (c) makes a beeping sound (d) senses how bright it is
  29. 29.True or false: a motor limits the current. (a) False (b) True
  30. 30.🧩 Which component blows if current is high? (a) thermistor (b) fuse (c) LDR (d) motor
  31. 31.True or false: a resistor makes things spin. (a) False (b) True
  32. 32.What does a resistor do? (a) limits the current (b) makes things spin (c) makes a beeping sound (d) beeps for an alarm
  33. 33.True or false: a transistor is a resistance knob. (a) False (b) True
  34. 34.True or false: a fuse senses how bright it is. (a) True (b) False
  35. 35.What does a potentiometer do? (a) is a resistance knob (b) boosts a small signal (c) makes things spin (d) lets current go one way
  36. 36.🧩 Which component senses how hot it is? (a) motor (b) diode (c) thermistor (d) transistor
  37. 37.True or false: an LED turns a fan or wheels. (a) True (b) False
  38. 38.🧩 Which component senses how bright it is? (a) LED (b) LDR (c) thermistor (d) resistor
  39. 39.True or false: a diode turns a fan or wheels. (a) False (b) True
  40. 40.What does a buzzer do? (a) has coloured bands (b) beeps for an alarm (c) senses how hot it is (d) makes things spin

Answer key

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

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