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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 473 · 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 potentiometer do? (a) senses how hot it is (b) is a resistance knob (c) makes things spin (d) has coloured bands
  2. 2.True or false: a capacitor stores a little charge. (a) False (b) True
  3. 3.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a diode (c) a buzzer (d) a resistor
  4. 4.What does a fuse do? (a) glows using little power (b) makes a beeping sound (c) blows if current is high (d) boosts a small signal
  5. 5.True or false: a capacitor is a resistance knob. (a) False (b) True
  6. 6.🧩 Which component smooths a wobbly supply? (a) LDR (b) thermistor (c) potentiometer (d) capacitor
  7. 7.True or false: a motor makes things spin. (a) True (b) False
  8. 8.🧩 Which component senses how hot it is? (a) LDR (b) thermistor (c) capacitor (d) resistor
  9. 9.What does a resistor do? (a) limits the current (b) smooths a wobbly supply (c) glows using little power (d) lets current go one way
  10. 10.True or false: a buzzer beeps for an alarm. (a) False (b) True
  11. 11.🧩 A capacitor in a circuit can … (a) measure heat (b) make light (c) spin a wheel (d) store charge briefly
  12. 12.True or false: an LED turns a fan or wheels. (a) True (b) False
  13. 13.What does a motor do? (a) makes things spin (b) senses how bright it is (c) senses how hot it is (d) beeps for an alarm
  14. 14.What does a capacitor do? (a) smooths a wobbly supply (b) beeps for an alarm (c) boosts a small signal (d) makes a beeping sound
  15. 15.🧩 Which component glows using little power? (a) LED (b) LDR (c) thermistor (d) diode
  16. 16.True or false: a fuse makes a beeping sound. (a) True (b) False
  17. 17.What does a motor do? (a) turns a fan or wheels (b) blows if current is high (c) has coloured bands (d) stores a little charge
  18. 18.🧩 Which component makes things spin? (a) fuse (b) resistor (c) capacitor (d) motor
  19. 19.🧩 Which part changes electrical energy into movement? (a) an LED (b) a resistor (c) a motor (d) a fuse
  20. 20.What does a buzzer do? (a) beeps for an alarm (b) turns a fan or wheels (c) has coloured bands (d) lets current go one way
  21. 21.🧩 Which component is a resistance knob? (a) potentiometer (b) buzzer (c) diode (d) resistor
  22. 22.True or false: a thermistor senses how hot it is. (a) True (b) False
  23. 23.🧩 Which component has coloured bands? (a) motor (b) resistor (c) LDR (d) potentiometer
  24. 24.What does a thermistor do? (a) is a resistance knob (b) senses how hot it is (c) smooths a wobbly supply (d) makes a beeping sound
  25. 25.True or false: a diode lets current go one way. (a) False (b) True
  26. 26.🧩 Which component turns a fan or wheels? (a) potentiometer (b) motor (c) resistor (d) thermistor
  27. 27.What does an LDR do? (a) senses how bright it is (b) beeps for an alarm (c) lets current go one way (d) smooths a wobbly supply
  28. 28.What does an LED do? (a) glows using little power (b) smooths a wobbly supply (c) senses how hot it is (d) makes a beeping sound
  29. 29.🧩 Which component makes a beeping sound? (a) fuse (b) motor (c) buzzer (d) resistor
  30. 30.What does a capacitor do? (a) blows if current is high (b) stores a little charge (c) turns a fan or wheels (d) has coloured bands
  31. 31.🧩 Which component blows if current is high? (a) capacitor (b) thermistor (c) fuse (d) buzzer
  32. 32.True or false: an LED makes a beeping sound. (a) True (b) False
  33. 33.True or false: a thermistor glows using little power. (a) False (b) True
  34. 34.🧩 Which component boosts a small signal? (a) capacitor (b) potentiometer (c) LDR (d) transistor
  35. 35.🧩 Which component limits the current? (a) resistor (b) transistor (c) buzzer (d) fuse
  36. 36.True or false: a potentiometer smooths a wobbly supply. (a) False (b) True
  37. 37.True or false: an LED glows using little power. (a) True (b) False
  38. 38.True or false: a transistor has coloured bands. (a) False (b) True
  39. 39.True or false: a potentiometer is a resistance knob. (a) False (b) True
  40. 40.True or false: a resistor makes a beeping sound. (a) True (b) False

Answer key

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

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