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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 599 · 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) beeps for an alarm (b) turns a fan or wheels (c) stores a little charge (d) smooths a wobbly supply
  2. 2.True or false: a buzzer has coloured bands. (a) True (b) False
  3. 3.🧩 Which component boosts a small signal? (a) buzzer (b) LED (c) diode (d) transistor
  4. 4.🧩 Which component limits the current? (a) motor (b) resistor (c) fuse (d) diode
  5. 5.🧩 Which component is a resistance knob? (a) fuse (b) potentiometer (c) resistor (d) LED
  6. 6.🧩 Which component lets current go one way? (a) thermistor (b) motor (c) diode (d) resistor
  7. 7.What does a capacitor do? (a) stores a little charge (b) makes a beeping sound (c) limits the current (d) senses how hot it is
  8. 8.🧩 A capacitor in a circuit can … (a) measure heat (b) make light (c) spin a wheel (d) store charge briefly
  9. 9.🧩 Which component stores a little charge? (a) fuse (b) LED (c) capacitor (d) buzzer
  10. 10.🧩 Which component makes things spin? (a) buzzer (b) thermistor (c) capacitor (d) motor
  11. 11.What does a buzzer do? (a) boosts a small signal (b) makes a beeping sound (c) limits the current (d) senses how hot it is
  12. 12.True or false: a resistor is a resistance knob. (a) False (b) True
  13. 13.What does a diode do? (a) lets current go one way (b) senses how hot it is (c) makes a beeping sound (d) makes things spin
  14. 14.🧩 Which component smooths a wobbly supply? (a) capacitor (b) fuse (c) motor (d) potentiometer
  15. 15.🧩 Which component beeps for an alarm? (a) buzzer (b) diode (c) motor (d) capacitor
  16. 16.True or false: an LED blows if current is high. (a) True (b) False
  17. 17.True or false: a diode lets current go one way. (a) True (b) False
  18. 18.🧩 Which component makes a beeping sound? (a) capacitor (b) diode (c) motor (d) buzzer
  19. 19.True or false: a capacitor boosts a small signal. (a) False (b) True
  20. 20.True or false: a potentiometer senses how bright it is. (a) False (b) True
  21. 21.🧩 Which component blows if current is high? (a) capacitor (b) diode (c) fuse (d) LED
  22. 22.True or false: a potentiometer makes things spin. (a) False (b) True
  23. 23.True or false: an LED has coloured bands. (a) False (b) True
  24. 24.🧩 Which component glows using little power? (a) motor (b) LED (c) transistor (d) buzzer
  25. 25.🧩 Which component senses how bright it is? (a) fuse (b) capacitor (c) LDR (d) buzzer
  26. 26.What does a transistor do? (a) turns a fan or wheels (b) limits the current (c) boosts a small signal (d) beeps for an alarm
  27. 27.True or false: an LDR senses how bright it is. (a) False (b) True
  28. 28.🧩 Which component turns a fan or wheels? (a) motor (b) fuse (c) diode (d) thermistor
  29. 29.True or false: an LDR has coloured bands. (a) True (b) False
  30. 30.True or false: a transistor blows if current is high. (a) False (b) True
  31. 31.True or false: a buzzer senses how hot it is. (a) False (b) True
  32. 32.🧩 Which part changes electrical energy into movement? (a) an LED (b) a motor (c) a fuse (d) a resistor
  33. 33.🧩 Which component senses how hot it is? (a) thermistor (b) buzzer (c) capacitor (d) transistor
  34. 34.What does a motor do? (a) is a resistance knob (b) senses how bright it is (c) makes things spin (d) has coloured bands
  35. 35.What does a resistor do? (a) boosts a small signal (b) glows using little power (c) limits the current (d) stores a little charge
  36. 36.What does an LDR do? (a) makes a beeping sound (b) stores a little charge (c) senses how bright it is (d) lets current go one way
  37. 37.What does a potentiometer do? (a) makes a beeping sound (b) beeps for an alarm (c) stores a little charge (d) is a resistance knob
  38. 38.True or false: a motor makes things spin. (a) True (b) False
  39. 39.True or false: a capacitor stores a little charge. (a) False (b) True
  40. 40.True or false: a buzzer blows if current is high. (a) False (b) True

Answer key

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

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