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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 415 · 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 resistor (b) a buzzer (c) a diode (d) a capacitor
  2. 2.True or false: a resistor has coloured bands. (a) True (b) False
  3. 3.🧩 Which component boosts a small signal? (a) transistor (b) LED (c) fuse (d) resistor
  4. 4.What does a resistor do? (a) glows using little power (b) senses how hot it is (c) limits the current (d) smooths a wobbly supply
  5. 5.True or false: a capacitor smooths a wobbly supply. (a) True (b) False
  6. 6.What does a thermistor do? (a) senses how hot it is (b) limits the current (c) turns a fan or wheels (d) has coloured bands
  7. 7.🧩 Which component makes a beeping sound? (a) resistor (b) transistor (c) diode (d) buzzer
  8. 8.True or false: a diode glows using little power. (a) True (b) False
  9. 9.What does a capacitor do? (a) boosts a small signal (b) limits the current (c) smooths a wobbly supply (d) turns a fan or wheels
  10. 10.🧩 Which component has coloured bands? (a) potentiometer (b) resistor (c) LED (d) diode
  11. 11.🧩 Which component is a resistance knob? (a) resistor (b) capacitor (c) diode (d) potentiometer
  12. 12.True or false: a motor beeps for an alarm. (a) True (b) False
  13. 13.🧩 Which component makes things spin? (a) capacitor (b) motor (c) thermistor (d) buzzer
  14. 14.True or false: a thermistor boosts a small signal. (a) False (b) True
  15. 15.What does a buzzer do? (a) beeps for an alarm (b) lets current go one way (c) senses how hot it is (d) stores a little charge
  16. 16.🧩 Which component senses how hot it is? (a) buzzer (b) thermistor (c) fuse (d) transistor
  17. 17.True or false: an LED glows using little power. (a) False (b) True
  18. 18.🧩 A capacitor in a circuit can … (a) spin a wheel (b) store charge briefly (c) measure heat (d) make light
  19. 19.True or false: a capacitor makes things spin. (a) True (b) False
  20. 20.True or false: a fuse makes a beeping sound. (a) True (b) False
  21. 21.What does a fuse do? (a) boosts a small signal (b) blows if current is high (c) limits the current (d) senses how bright it is
  22. 22.What does an LDR do? (a) blows if current is high (b) lets current go one way (c) senses how bright it is (d) stores a little charge
  23. 23.🧩 Which part changes electrical energy into movement? (a) a motor (b) a fuse (c) a resistor (d) an LED
  24. 24.True or false: a resistor makes a beeping sound. (a) True (b) False
  25. 25.🧩 Which component limits the current? (a) transistor (b) LED (c) resistor (d) potentiometer
  26. 26.🧩 Which component beeps for an alarm? (a) resistor (b) potentiometer (c) capacitor (d) buzzer
  27. 27.🧩 Which component glows using little power? (a) diode (b) LED (c) transistor (d) motor
  28. 28.True or false: a capacitor turns a fan or wheels. (a) True (b) False
  29. 29.True or false: a thermistor senses how hot it is. (a) True (b) False
  30. 30.True or false: a fuse blows if current is high. (a) True (b) False
  31. 31.🧩 Which component lets current go one way? (a) capacitor (b) diode (c) LDR (d) thermistor
  32. 32.What does a potentiometer do? (a) blows if current is high (b) limits the current (c) lets current go one way (d) is a resistance knob
  33. 33.True or false: a potentiometer senses how bright it is. (a) False (b) True
  34. 34.What does a resistor do? (a) smooths a wobbly supply (b) boosts a small signal (c) has coloured bands (d) makes things spin
  35. 35.What does a diode do? (a) beeps for an alarm (b) stores a little charge (c) lets current go one way (d) senses how bright it is
  36. 36.True or false: a motor makes things spin. (a) False (b) True
  37. 37.🧩 Which component blows if current is high? (a) LED (b) LDR (c) fuse (d) thermistor
  38. 38.What does a motor do? (a) beeps for an alarm (b) is a resistance knob (c) turns a fan or wheels (d) boosts a small signal
  39. 39.🧩 Which component stores a little charge? (a) capacitor (b) resistor (c) potentiometer (d) fuse
  40. 40.🧩 Which component turns a fan or wheels? (a) motor (b) diode (c) fuse (d) resistor

Answer key

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

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