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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 443 · 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 beeps for an alarm. (a) False (b) True
  2. 2.🧩 Which component limits the current? (a) resistor (b) capacitor (c) buzzer (d) diode
  3. 3.True or false: an LED lets current go one way. (a) True (b) False
  4. 4.What does a motor do? (a) has coloured bands (b) lets current go one way (c) stores a little charge (d) makes things spin
  5. 5.🧩 A capacitor in a circuit can … (a) measure heat (b) spin a wheel (c) store charge briefly (d) make light
  6. 6.True or false: a capacitor stores a little charge. (a) False (b) True
  7. 7.🧩 Which component beeps for an alarm? (a) diode (b) LED (c) transistor (d) buzzer
  8. 8.🧩 Which component senses how bright it is? (a) diode (b) buzzer (c) LDR (d) capacitor
  9. 9.What does a buzzer do? (a) limits the current (b) boosts a small signal (c) senses how hot it is (d) makes a beeping sound
  10. 10.🧩 Which component makes a beeping sound? (a) potentiometer (b) buzzer (c) diode (d) LDR
  11. 11.True or false: a transistor senses how bright it is. (a) False (b) True
  12. 12.🧩 Which component smooths a wobbly supply? (a) LDR (b) resistor (c) capacitor (d) LED
  13. 13.🧩 Which component boosts a small signal? (a) potentiometer (b) thermistor (c) transistor (d) fuse
  14. 14.True or false: a fuse senses how bright it is. (a) True (b) False
  15. 15.🧩 Which component has coloured bands? (a) motor (b) resistor (c) thermistor (d) buzzer
  16. 16.🧩 Which part changes electrical energy into movement? (a) a resistor (b) a motor (c) a fuse (d) an LED
  17. 17.True or false: a capacitor glows using little power. (a) False (b) True
  18. 18.True or false: a potentiometer lets current go one way. (a) True (b) False
  19. 19.True or false: a potentiometer is a resistance knob. (a) False (b) True
  20. 20.What does an LED do? (a) makes a beeping sound (b) smooths a wobbly supply (c) glows using little power (d) boosts a small signal
  21. 21.True or false: a buzzer senses how hot it is. (a) True (b) False
  22. 22.True or false: a buzzer makes things spin. (a) True (b) False
  23. 23.What does a thermistor do? (a) lets current go one way (b) stores a little charge (c) senses how hot it is (d) limits the current
  24. 24.🧩 Which part changes electrical energy into sound? (a) a buzzer (b) a resistor (c) a capacitor (d) a diode
  25. 25.🧩 Which component blows if current is high? (a) transistor (b) fuse (c) LED (d) resistor
  26. 26.True or false: a thermistor senses how hot it is. (a) False (b) True
  27. 27.What does a resistor do? (a) glows using little power (b) stores a little charge (c) is a resistance knob (d) has coloured bands
  28. 28.What does a capacitor do? (a) boosts a small signal (b) beeps for an alarm (c) stores a little charge (d) glows using little power
  29. 29.What does a diode do? (a) glows using little power (b) senses how hot it is (c) lets current go one way (d) is a resistance knob
  30. 30.True or false: a fuse blows if current is high. (a) True (b) False
  31. 31.True or false: an LED is a resistance knob. (a) False (b) True
  32. 32.True or false: a resistor limits the current. (a) False (b) True
  33. 33.True or false: a potentiometer boosts a small signal. (a) False (b) True
  34. 34.True or false: a potentiometer senses how bright it is. (a) True (b) False
  35. 35.What does an LDR do? (a) boosts a small signal (b) glows using little power (c) senses how bright it is (d) makes things spin
  36. 36.What does a transistor do? (a) is a resistance knob (b) has coloured bands (c) smooths a wobbly supply (d) boosts a small signal
  37. 37.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
  38. 38.True or false: an LDR lets current go one way. (a) False (b) True
  39. 39.True or false: an LED limits the current. (a) True (b) False
  40. 40.What does a potentiometer do? (a) beeps for an alarm (b) lets current go one way (c) is a resistance knob (d) limits the current

Answer key

  1. False
  2. resistor
  3. False
  4. makes things spin
  5. store charge briefly
  6. True
  7. buzzer
  8. LDR
  9. makes a beeping sound
  10. buzzer
  11. False
  12. capacitor
  13. transistor
  14. False
  15. resistor
  16. a motor
  17. False
  18. False
  19. True
  20. glows using little power
  21. False
  22. False
  23. senses how hot it is
  24. a buzzer
  25. fuse
  26. True
  27. has coloured bands
  28. stores a little charge
  29. lets current go one way
  30. True
  31. False
  32. True
  33. False
  34. False
  35. senses how bright it is
  36. boosts a small signal
  37. True
  38. False
  39. False
  40. is a resistance knob

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