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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 621 · 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 capacitor smooths a wobbly supply. (a) False (b) True
  2. 2.True or false: a capacitor makes things spin. (a) False (b) True
  3. 3.What does a buzzer do? (a) makes a beeping sound (b) makes things spin (c) senses how hot it is (d) senses how bright it is
  4. 4.🧩 Which component blows if current is high? (a) thermistor (b) buzzer (c) fuse (d) transistor
  5. 5.🧩 A capacitor in a circuit can … (a) measure heat (b) store charge briefly (c) spin a wheel (d) make light
  6. 6.🧩 Which component stores a little charge? (a) LDR (b) capacitor (c) transistor (d) buzzer
  7. 7.🧩 Which component makes a beeping sound? (a) fuse (b) LDR (c) buzzer (d) transistor
  8. 8.True or false: a potentiometer is a resistance knob. (a) True (b) False
  9. 9.What does a resistor do? (a) lets current go one way (b) limits the current (c) glows using little power (d) beeps for an alarm
  10. 10.True or false: a capacitor is a resistance knob. (a) True (b) False
  11. 11.True or false: a buzzer makes a beeping sound. (a) True (b) False
  12. 12.🧩 Which component glows using little power? (a) transistor (b) LED (c) fuse (d) capacitor
  13. 13.🧩 Which part changes electrical energy into sound? (a) a buzzer (b) a resistor (c) a diode (d) a capacitor
  14. 14.What does an LED do? (a) stores a little charge (b) senses how hot it is (c) has coloured bands (d) glows using little power
  15. 15.True or false: a thermistor has coloured bands. (a) False (b) True
  16. 16.What does a thermistor do? (a) has coloured bands (b) senses how hot it is (c) smooths a wobbly supply (d) senses how bright it is
  17. 17.🧩 Which component senses how hot it is? (a) potentiometer (b) capacitor (c) thermistor (d) LED
  18. 18.🧩 Which component boosts a small signal? (a) resistor (b) fuse (c) transistor (d) diode
  19. 19.True or false: a resistor makes things spin. (a) True (b) False
  20. 20.🧩 Which part changes electrical energy into movement? (a) a fuse (b) a motor (c) an LED (d) a resistor
  21. 21.🧩 Which component senses how bright it is? (a) LDR (b) capacitor (c) LED (d) resistor
  22. 22.What does a potentiometer do? (a) blows if current is high (b) boosts a small signal (c) is a resistance knob (d) beeps for an alarm
  23. 23.What does a fuse do? (a) blows if current is high (b) limits the current (c) boosts a small signal (d) senses how hot it is
  24. 24.True or false: a transistor senses how hot it is. (a) True (b) False
  25. 25.True or false: a transistor smooths a wobbly supply. (a) False (b) True
  26. 26.True or false: a diode lets current go one way. (a) True (b) False
  27. 27.What does a diode do? (a) makes a beeping sound (b) glows using little power (c) senses how bright it is (d) lets current go one way
  28. 28.True or false: a buzzer has coloured bands. (a) True (b) False
  29. 29.True or false: a fuse blows if current is high. (a) True (b) False
  30. 30.True or false: a potentiometer makes things spin. (a) True (b) False
  31. 31.True or false: a diode turns a fan or wheels. (a) True (b) False
  32. 32.True or false: a buzzer smooths a wobbly supply. (a) False (b) True
  33. 33.True or false: a fuse is a resistance knob. (a) True (b) False
  34. 34.What does a buzzer do? (a) boosts a small signal (b) blows if current is high (c) smooths a wobbly supply (d) beeps for an alarm
  35. 35.🧩 Which component has coloured bands? (a) motor (b) fuse (c) resistor (d) potentiometer
  36. 36.What does an LDR do? (a) is a resistance knob (b) blows if current is high (c) lets current go one way (d) senses how bright it is
  37. 37.🧩 Which component limits the current? (a) capacitor (b) fuse (c) LDR (d) resistor
  38. 38.True or false: a motor makes things spin. (a) False (b) True
  39. 39.True or false: an LED glows using little power. (a) True (b) False
  40. 40.True or false: a thermistor stores a little charge. (a) False (b) True

Answer key

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

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