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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 464 · 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.What does a buzzer do? (a) has coloured bands (b) lets current go one way (c) beeps for an alarm (d) smooths a wobbly supply
  2. 2.🧩 Which component makes a beeping sound? (a) resistor (b) buzzer (c) thermistor (d) potentiometer
  3. 3.What does a thermistor do? (a) glows using little power (b) has coloured bands (c) senses how hot it is (d) stores a little charge
  4. 4.True or false: a capacitor stores a little charge. (a) False (b) True
  5. 5.True or false: a resistor has coloured bands. (a) False (b) True
  6. 6.🧩 Which component has coloured bands? (a) potentiometer (b) diode (c) resistor (d) fuse
  7. 7.🧩 Which component beeps for an alarm? (a) potentiometer (b) thermistor (c) buzzer (d) LED
  8. 8.What does a fuse do? (a) blows if current is high (b) limits the current (c) has coloured bands (d) boosts a small signal
  9. 9.True or false: a motor makes things spin. (a) False (b) True
  10. 10.What does an LDR do? (a) senses how bright it is (b) boosts a small signal (c) limits the current (d) blows if current is high
  11. 11.🧩 Which component is a resistance knob? (a) fuse (b) LDR (c) potentiometer (d) capacitor
  12. 12.What does a transistor do? (a) glows using little power (b) makes things spin (c) boosts a small signal (d) senses how hot it is
  13. 13.True or false: a fuse blows if current is high. (a) False (b) True
  14. 14.What does a motor do? (a) senses how bright it is (b) turns a fan or wheels (c) smooths a wobbly supply (d) lets current go one way
  15. 15.🧩 A capacitor in a circuit can … (a) spin a wheel (b) store charge briefly (c) make light (d) measure heat
  16. 16.What does a resistor do? (a) has coloured bands (b) makes a beeping sound (c) lets current go one way (d) is a resistance knob
  17. 17.🧩 Which part changes electrical energy into sound? (a) a buzzer (b) a resistor (c) a diode (d) a capacitor
  18. 18.🧩 Which component lets current go one way? (a) buzzer (b) fuse (c) capacitor (d) diode
  19. 19.🧩 Which component limits the current? (a) LED (b) capacitor (c) resistor (d) LDR
  20. 20.True or false: a potentiometer senses how hot it is. (a) False (b) True
  21. 21.🧩 Which component turns a fan or wheels? (a) LDR (b) motor (c) fuse (d) transistor
  22. 22.True or false: a motor blows if current is high. (a) False (b) True
  23. 23.What does an LED do? (a) glows using little power (b) stores a little charge (c) makes things spin (d) senses how hot it is
  24. 24.True or false: a motor smooths a wobbly supply. (a) True (b) False
  25. 25.What does a diode do? (a) lets current go one way (b) is a resistance knob (c) senses how hot it is (d) beeps for an alarm
  26. 26.What does a capacitor do? (a) makes things spin (b) stores a little charge (c) glows using little power (d) lets current go one way
  27. 27.🧩 Which component stores a little charge? (a) LED (b) capacitor (c) resistor (d) transistor
  28. 28.True or false: an LED stores a little charge. (a) False (b) True
  29. 29.What does a capacitor do? (a) makes things spin (b) smooths a wobbly supply (c) senses how hot it is (d) lets current go one way
  30. 30.🧩 Which component boosts a small signal? (a) transistor (b) diode (c) capacitor (d) motor
  31. 31.What does a resistor do? (a) blows if current is high (b) senses how hot it is (c) limits the current (d) turns a fan or wheels
  32. 32.What does a motor do? (a) beeps for an alarm (b) has coloured bands (c) stores a little charge (d) makes things spin
  33. 33.True or false: a motor turns a fan or wheels. (a) False (b) True
  34. 34.True or false: a resistor beeps for an alarm. (a) False (b) True
  35. 35.🧩 Which component glows using little power? (a) LDR (b) motor (c) potentiometer (d) LED
  36. 36.True or false: a capacitor senses how hot it is. (a) True (b) False
  37. 37.True or false: an LED senses how hot it is. (a) True (b) False
  38. 38.🧩 Which part changes electrical energy into movement? (a) a fuse (b) an LED (c) a resistor (d) a motor
  39. 39.True or false: an LED limits the current. (a) False (b) True
  40. 40.True or false: a potentiometer glows using little power. (a) True (b) False

Answer key

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

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