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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 370 · 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 smooths a wobbly supply? (a) LDR (b) capacitor (c) transistor (d) LED
  2. 2.🧩 Which part changes electrical energy into movement? (a) a fuse (b) an LED (c) a motor (d) a resistor
  3. 3.What does a potentiometer do? (a) limits the current (b) is a resistance knob (c) makes a beeping sound (d) makes things spin
  4. 4.🧩 Which component glows using little power? (a) buzzer (b) transistor (c) LED (d) capacitor
  5. 5.🧩 A capacitor in a circuit can … (a) make light (b) measure heat (c) store charge briefly (d) spin a wheel
  6. 6.🧩 Which component stores a little charge? (a) resistor (b) buzzer (c) potentiometer (d) capacitor
  7. 7.🧩 Which part changes electrical energy into sound? (a) a buzzer (b) a diode (c) a resistor (d) a capacitor
  8. 8.🧩 Which component makes a beeping sound? (a) capacitor (b) buzzer (c) motor (d) resistor
  9. 9.True or false: an LED glows using little power. (a) False (b) True
  10. 10.🧩 Which component makes things spin? (a) motor (b) LED (c) transistor (d) diode
  11. 11.🧩 Which component limits the current? (a) capacitor (b) diode (c) LDR (d) resistor
  12. 12.True or false: a capacitor stores a little charge. (a) False (b) True
  13. 13.What does a buzzer do? (a) makes things spin (b) smooths a wobbly supply (c) beeps for an alarm (d) glows using little power
  14. 14.What does a buzzer do? (a) makes a beeping sound (b) blows if current is high (c) has coloured bands (d) senses how hot it is
  15. 15.What does a diode do? (a) beeps for an alarm (b) is a resistance knob (c) senses how bright it is (d) lets current go one way
  16. 16.True or false: a resistor lets current go one way. (a) True (b) False
  17. 17.What does a capacitor do? (a) boosts a small signal (b) is a resistance knob (c) stores a little charge (d) glows using little power
  18. 18.What does a motor do? (a) limits the current (b) lets current go one way (c) makes things spin (d) stores a little charge
  19. 19.🧩 Which component beeps for an alarm? (a) motor (b) thermistor (c) buzzer (d) resistor
  20. 20.🧩 Which component boosts a small signal? (a) motor (b) fuse (c) capacitor (d) transistor
  21. 21.True or false: a thermistor senses how hot it is. (a) True (b) False
  22. 22.What does an LDR do? (a) lets current go one way (b) senses how bright it is (c) has coloured bands (d) is a resistance knob
  23. 23.True or false: a thermistor boosts a small signal. (a) False (b) True
  24. 24.🧩 Which component has coloured bands? (a) resistor (b) capacitor (c) diode (d) thermistor
  25. 25.True or false: an LDR has coloured bands. (a) True (b) False
  26. 26.True or false: a motor turns a fan or wheels. (a) True (b) False
  27. 27.🧩 Which component senses how hot it is? (a) transistor (b) LED (c) LDR (d) thermistor
  28. 28.🧩 Which component senses how bright it is? (a) diode (b) LDR (c) potentiometer (d) transistor
  29. 29.🧩 Which component turns a fan or wheels? (a) resistor (b) thermistor (c) motor (d) capacitor
  30. 30.🧩 Which component is a resistance knob? (a) resistor (b) potentiometer (c) buzzer (d) capacitor
  31. 31.True or false: a motor makes a beeping sound. (a) False (b) True
  32. 32.True or false: a fuse blows if current is high. (a) True (b) False
  33. 33.🧩 Which component lets current go one way? (a) diode (b) transistor (c) thermistor (d) fuse
  34. 34.What does a resistor do? (a) beeps for an alarm (b) limits the current (c) boosts a small signal (d) lets current go one way
  35. 35.True or false: a motor has coloured bands. (a) True (b) False
  36. 36.True or false: a capacitor lets current go one way. (a) True (b) False
  37. 37.What does an LED do? (a) boosts a small signal (b) blows if current is high (c) is a resistance knob (d) glows using little power
  38. 38.True or false: a resistor has coloured bands. (a) True (b) False
  39. 39.True or false: a fuse stores a little charge. (a) False (b) True
  40. 40.🧩 Which component blows if current is high? (a) fuse (b) potentiometer (c) buzzer (d) capacitor

Answer key

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

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