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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 260 · 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 buzzer beeps for an alarm. (a) False (b) True
  2. 2.True or false: a buzzer boosts a small signal. (a) False (b) True
  3. 3.🧩 Which component is a resistance knob? (a) potentiometer (b) LDR (c) LED (d) fuse
  4. 4.What does a motor do? (a) smooths a wobbly supply (b) beeps for an alarm (c) senses how bright it is (d) makes things spin
  5. 5.True or false: an LDR boosts a small signal. (a) False (b) True
  6. 6.True or false: a buzzer makes a beeping sound. (a) True (b) False
  7. 7.What does an LDR do? (a) smooths a wobbly supply (b) senses how bright it is (c) makes a beeping sound (d) limits the current
  8. 8.🧩 Which part changes electrical energy into sound? (a) a diode (b) a capacitor (c) a buzzer (d) a resistor
  9. 9.True or false: a thermistor has coloured bands. (a) False (b) True
  10. 10.🧩 Which component turns a fan or wheels? (a) motor (b) potentiometer (c) LDR (d) capacitor
  11. 11.🧩 Which part changes electrical energy into movement? (a) a fuse (b) a motor (c) an LED (d) a resistor
  12. 12.True or false: a capacitor smooths a wobbly supply. (a) True (b) False
  13. 13.🧩 Which component has coloured bands? (a) resistor (b) buzzer (c) fuse (d) potentiometer
  14. 14.What does a thermistor do? (a) makes a beeping sound (b) limits the current (c) blows if current is high (d) senses how hot it is
  15. 15.True or false: a resistor has coloured bands. (a) False (b) True
  16. 16.True or false: a motor turns a fan or wheels. (a) True (b) False
  17. 17.🧩 A capacitor in a circuit can … (a) measure heat (b) make light (c) store charge briefly (d) spin a wheel
  18. 18.🧩 Which component senses how bright it is? (a) motor (b) LDR (c) resistor (d) capacitor
  19. 19.What does a capacitor do? (a) boosts a small signal (b) has coloured bands (c) is a resistance knob (d) stores a little charge
  20. 20.What does an LED do? (a) blows if current is high (b) makes a beeping sound (c) makes things spin (d) glows using little power
  21. 21.🧩 Which component makes things spin? (a) fuse (b) motor (c) capacitor (d) diode
  22. 22.What does a diode do? (a) makes things spin (b) glows using little power (c) beeps for an alarm (d) lets current go one way
  23. 23.🧩 Which component blows if current is high? (a) potentiometer (b) fuse (c) LDR (d) LED
  24. 24.🧩 Which component limits the current? (a) potentiometer (b) resistor (c) motor (d) diode
  25. 25.True or false: an LED glows using little power. (a) True (b) False
  26. 26.What does a fuse do? (a) blows if current is high (b) lets current go one way (c) has coloured bands (d) stores a little charge
  27. 27.What does a capacitor do? (a) beeps for an alarm (b) senses how bright it is (c) boosts a small signal (d) smooths a wobbly supply
  28. 28.🧩 Which component makes a beeping sound? (a) thermistor (b) transistor (c) buzzer (d) capacitor
  29. 29.True or false: a motor has coloured bands. (a) True (b) False
  30. 30.🧩 Which component senses how hot it is? (a) motor (b) LED (c) potentiometer (d) thermistor
  31. 31.True or false: a thermistor smooths a wobbly supply. (a) True (b) False
  32. 32.What does a resistor do? (a) blows if current is high (b) makes things spin (c) senses how bright it is (d) has coloured bands
  33. 33.True or false: an LED is a resistance knob. (a) False (b) True
  34. 34.True or false: an LED beeps for an alarm. (a) False (b) True
  35. 35.🧩 Which component smooths a wobbly supply? (a) capacitor (b) diode (c) fuse (d) resistor
  36. 36.What does a transistor do? (a) beeps for an alarm (b) is a resistance knob (c) limits the current (d) boosts a small signal
  37. 37.🧩 Which component stores a little charge? (a) capacitor (b) thermistor (c) LED (d) buzzer
  38. 38.True or false: a diode lets current go one way. (a) False (b) True
  39. 39.🧩 Which component beeps for an alarm? (a) transistor (b) buzzer (c) motor (d) LED
  40. 40.What does a motor do? (a) limits the current (b) makes a beeping sound (c) turns a fan or wheels (d) senses how bright it is

Answer key

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

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