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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 568 · 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 lets current go one way? (a) transistor (b) motor (c) resistor (d) diode
  2. 2.🧩 Which component beeps for an alarm? (a) fuse (b) LED (c) potentiometer (d) buzzer
  3. 3.🧩 Which component smooths a wobbly supply? (a) potentiometer (b) motor (c) capacitor (d) diode
  4. 4.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
  5. 5.What does a buzzer do? (a) stores a little charge (b) makes things spin (c) glows using little power (d) makes a beeping sound
  6. 6.🧩 Which component senses how hot it is? (a) fuse (b) thermistor (c) buzzer (d) diode
  7. 7.True or false: a buzzer makes a beeping sound. (a) False (b) True
  8. 8.What does an LDR do? (a) turns a fan or wheels (b) has coloured bands (c) senses how bright it is (d) limits the current
  9. 9.🧩 Which component is a resistance knob? (a) resistor (b) potentiometer (c) buzzer (d) transistor
  10. 10.True or false: a thermistor glows using little power. (a) False (b) True
  11. 11.🧩 Which component makes things spin? (a) thermistor (b) resistor (c) motor (d) capacitor
  12. 12.True or false: a thermistor senses how hot it is. (a) False (b) True
  13. 13.What does a resistor do? (a) stores a little charge (b) makes things spin (c) senses how bright it is (d) has coloured bands
  14. 14.What does a fuse do? (a) senses how bright it is (b) is a resistance knob (c) blows if current is high (d) limits the current
  15. 15.True or false: a potentiometer is a resistance knob. (a) False (b) True
  16. 16.🧩 A capacitor in a circuit can … (a) make light (b) store charge briefly (c) measure heat (d) spin a wheel
  17. 17.True or false: an LED beeps for an alarm. (a) True (b) False
  18. 18.🧩 Which component turns a fan or wheels? (a) motor (b) LDR (c) fuse (d) buzzer
  19. 19.True or false: a transistor boosts a small signal. (a) True (b) False
  20. 20.What does a capacitor do? (a) senses how hot it is (b) beeps for an alarm (c) senses how bright it is (d) smooths a wobbly supply
  21. 21.What does an LED do? (a) glows using little power (b) beeps for an alarm (c) turns a fan or wheels (d) smooths a wobbly supply
  22. 22.🧩 Which component limits the current? (a) capacitor (b) thermistor (c) resistor (d) LDR
  23. 23.True or false: a motor makes things spin. (a) False (b) True
  24. 24.🧩 Which component glows using little power? (a) LDR (b) thermistor (c) LED (d) diode
  25. 25.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
  26. 26.What does a diode do? (a) has coloured bands (b) lets current go one way (c) senses how bright it is (d) makes things spin
  27. 27.🧩 Which part changes electrical energy into movement? (a) an LED (b) a resistor (c) a fuse (d) a motor
  28. 28.True or false: an LED glows using little power. (a) False (b) True
  29. 29.True or false: a thermistor beeps for an alarm. (a) False (b) True
  30. 30.True or false: a buzzer is a resistance knob. (a) False (b) True
  31. 31.True or false: an LDR limits the current. (a) False (b) True
  32. 32.🧩 Which component blows if current is high? (a) diode (b) motor (c) buzzer (d) fuse
  33. 33.🧩 Which component boosts a small signal? (a) transistor (b) motor (c) potentiometer (d) diode
  34. 34.True or false: a diode lets current go one way. (a) False (b) True
  35. 35.True or false: a capacitor stores a little charge. (a) False (b) True
  36. 36.True or false: a resistor limits the current. (a) True (b) False
  37. 37.🧩 Which component stores a little charge? (a) capacitor (b) potentiometer (c) motor (d) fuse
  38. 38.🧩 Which part changes electrical energy into sound? (a) a diode (b) a capacitor (c) a resistor (d) a buzzer
  39. 39.True or false: a capacitor turns a fan or wheels. (a) True (b) False
  40. 40.🧩 Which component senses how bright it is? (a) LED (b) buzzer (c) LDR (d) capacitor

Answer key

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

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