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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 503 · 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) LED (b) diode (c) motor (d) capacitor
  2. 2.True or false: a thermistor lets current go one way. (a) False (b) True
  3. 3.🧩 Which part changes electrical energy into sound? (a) a diode (b) a capacitor (c) a resistor (d) a buzzer
  4. 4.🧩 Which component blows if current is high? (a) LED (b) transistor (c) LDR (d) fuse
  5. 5.🧩 Which part changes electrical energy into movement? (a) a resistor (b) an LED (c) a fuse (d) a motor
  6. 6.What does a capacitor do? (a) smooths a wobbly supply (b) senses how bright it is (c) makes a beeping sound (d) glows using little power
  7. 7.🧩 Which component turns a fan or wheels? (a) transistor (b) LDR (c) resistor (d) motor
  8. 8.What does a thermistor do? (a) stores a little charge (b) senses how hot it is (c) limits the current (d) makes a beeping sound
  9. 9.True or false: a fuse blows if current is high. (a) False (b) True
  10. 10.🧩 Which component makes things spin? (a) motor (b) LDR (c) buzzer (d) thermistor
  11. 11.True or false: a resistor lets current go one way. (a) True (b) False
  12. 12.🧩 A capacitor in a circuit can … (a) spin a wheel (b) make light (c) measure heat (d) store charge briefly
  13. 13.What does a diode do? (a) blows if current is high (b) makes things spin (c) glows using little power (d) lets current go one way
  14. 14.🧩 Which component glows using little power? (a) transistor (b) resistor (c) LED (d) LDR
  15. 15.What does a buzzer do? (a) limits the current (b) smooths a wobbly supply (c) makes a beeping sound (d) glows using little power
  16. 16.🧩 Which component limits the current? (a) fuse (b) thermistor (c) LED (d) resistor
  17. 17.What does a buzzer do? (a) limits the current (b) beeps for an alarm (c) lets current go one way (d) glows using little power
  18. 18.🧩 Which component boosts a small signal? (a) transistor (b) LED (c) LDR (d) motor
  19. 19.🧩 Which component senses how bright it is? (a) transistor (b) resistor (c) LDR (d) fuse
  20. 20.🧩 Which component makes a beeping sound? (a) diode (b) motor (c) fuse (d) buzzer
  21. 21.True or false: a capacitor makes a beeping sound. (a) True (b) False
  22. 22.🧩 Which component lets current go one way? (a) diode (b) resistor (c) transistor (d) potentiometer
  23. 23.What does a motor do? (a) senses how hot it is (b) blows if current is high (c) turns a fan or wheels (d) is a resistance knob
  24. 24.🧩 Which component is a resistance knob? (a) resistor (b) potentiometer (c) buzzer (d) motor
  25. 25.🧩 Which component has coloured bands? (a) diode (b) resistor (c) LDR (d) transistor
  26. 26.True or false: a capacitor is a resistance knob. (a) True (b) False
  27. 27.True or false: a thermistor makes things spin. (a) True (b) False
  28. 28.What does a motor do? (a) beeps for an alarm (b) makes things spin (c) has coloured bands (d) limits the current
  29. 29.True or false: an LED senses how hot it is. (a) False (b) True
  30. 30.True or false: a capacitor senses how hot it is. (a) True (b) False
  31. 31.True or false: a transistor boosts a small signal. (a) True (b) False
  32. 32.🧩 Which component senses how hot it is? (a) LED (b) thermistor (c) fuse (d) diode
  33. 33.🧩 Which component stores a little charge? (a) resistor (b) motor (c) capacitor (d) fuse
  34. 34.What does an LDR do? (a) beeps for an alarm (b) limits the current (c) stores a little charge (d) senses how bright it is
  35. 35.True or false: an LED turns a fan or wheels. (a) True (b) False
  36. 36.What does a resistor do? (a) has coloured bands (b) smooths a wobbly supply (c) makes things spin (d) is a resistance knob
  37. 37.🧩 Which component beeps for an alarm? (a) capacitor (b) transistor (c) buzzer (d) LDR
  38. 38.What does a capacitor do? (a) stores a little charge (b) glows using little power (c) makes a beeping sound (d) turns a fan or wheels
  39. 39.True or false: a diode stores a little charge. (a) True (b) False
  40. 40.What does an LED do? (a) glows using little power (b) makes things spin (c) has coloured bands (d) smooths a wobbly supply

Answer key

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

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