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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 582 · 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.True or false: a diode lets current go one way. (a) False (b) True
  2. 2.🧩 Which part changes electrical energy into sound? (a) a buzzer (b) a diode (c) a capacitor (d) a resistor
  3. 3.True or false: a capacitor stores a little charge. (a) False (b) True
  4. 4.🧩 Which component is a resistance knob? (a) motor (b) diode (c) thermistor (d) potentiometer
  5. 5.🧩 Which part changes electrical energy into movement? (a) an LED (b) a motor (c) a resistor (d) a fuse
  6. 6.What does a potentiometer do? (a) smooths a wobbly supply (b) is a resistance knob (c) limits the current (d) makes things spin
  7. 7.What does a resistor do? (a) has coloured bands (b) is a resistance knob (c) glows using little power (d) stores a little charge
  8. 8.True or false: a motor makes a beeping sound. (a) True (b) False
  9. 9.🧩 Which component beeps for an alarm? (a) diode (b) buzzer (c) capacitor (d) LED
  10. 10.🧩 Which component makes a beeping sound? (a) LED (b) diode (c) resistor (d) buzzer
  11. 11.🧩 Which component boosts a small signal? (a) diode (b) thermistor (c) transistor (d) motor
  12. 12.True or false: a thermistor limits the current. (a) False (b) True
  13. 13.What does a transistor do? (a) senses how hot it is (b) boosts a small signal (c) turns a fan or wheels (d) senses how bright it is
  14. 14.What does an LDR do? (a) makes a beeping sound (b) senses how bright it is (c) blows if current is high (d) glows using little power
  15. 15.🧩 Which component has coloured bands? (a) buzzer (b) resistor (c) LED (d) motor
  16. 16.🧩 A capacitor in a circuit can … (a) measure heat (b) spin a wheel (c) store charge briefly (d) make light
  17. 17.🧩 Which component smooths a wobbly supply? (a) capacitor (b) LED (c) transistor (d) diode
  18. 18.True or false: a buzzer makes a beeping sound. (a) False (b) True
  19. 19.True or false: a potentiometer glows using little power. (a) False (b) True
  20. 20.True or false: a buzzer beeps for an alarm. (a) False (b) True
  21. 21.True or false: a potentiometer is a resistance knob. (a) True (b) False
  22. 22.True or false: a thermistor senses how hot it is. (a) False (b) True
  23. 23.True or false: a fuse smooths a wobbly supply. (a) False (b) True
  24. 24.What does a thermistor do? (a) lets current go one way (b) senses how bright it is (c) smooths a wobbly supply (d) senses how hot it is
  25. 25.What does a buzzer do? (a) makes things spin (b) senses how hot it is (c) glows using little power (d) beeps for an alarm
  26. 26.True or false: an LDR senses how bright it is. (a) False (b) True
  27. 27.What does a motor do? (a) limits the current (b) turns a fan or wheels (c) senses how bright it is (d) smooths a wobbly supply
  28. 28.What does a fuse do? (a) blows if current is high (b) senses how bright it is (c) smooths a wobbly supply (d) has coloured bands
  29. 29.🧩 Which component stores a little charge? (a) diode (b) motor (c) resistor (d) capacitor
  30. 30.True or false: a resistor has coloured bands. (a) True (b) False
  31. 31.🧩 Which component turns a fan or wheels? (a) diode (b) motor (c) fuse (d) buzzer
  32. 32.What does a capacitor do? (a) stores a little charge (b) glows using little power (c) lets current go one way (d) turns a fan or wheels
  33. 33.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
  34. 34.True or false: an LDR limits the current. (a) False (b) True
  35. 35.🧩 Which component glows using little power? (a) thermistor (b) buzzer (c) LED (d) resistor
  36. 36.What does a buzzer do? (a) senses how hot it is (b) stores a little charge (c) senses how bright it is (d) makes a beeping sound
  37. 37.🧩 Which component senses how hot it is? (a) thermistor (b) buzzer (c) resistor (d) LED
  38. 38.🧩 Which component limits the current? (a) buzzer (b) resistor (c) potentiometer (d) capacitor
  39. 39.True or false: a thermistor turns a fan or wheels. (a) False (b) True
  40. 40.What does a motor do? (a) smooths a wobbly supply (b) makes a beeping sound (c) makes things spin (d) boosts a small signal

Answer key

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

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