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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 537 · 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 transistor do? (a) boosts a small signal (b) senses how bright it is (c) limits the current (d) lets current go one way
  2. 2.🧩 Which part changes electrical energy into movement? (a) an LED (b) a resistor (c) a motor (d) a fuse
  3. 3.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
  4. 4.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a resistor (c) a diode (d) a buzzer
  5. 5.🧩 A capacitor in a circuit can … (a) spin a wheel (b) make light (c) measure heat (d) store charge briefly
  6. 6.🧩 Which component has coloured bands? (a) buzzer (b) LDR (c) resistor (d) LED
  7. 7.What does a diode do? (a) turns a fan or wheels (b) smooths a wobbly supply (c) lets current go one way (d) makes a beeping sound
  8. 8.🧩 Which component makes a beeping sound? (a) fuse (b) transistor (c) buzzer (d) diode
  9. 9.True or false: a resistor has coloured bands. (a) False (b) True
  10. 10.What does a buzzer do? (a) makes things spin (b) beeps for an alarm (c) is a resistance knob (d) lets current go one way
  11. 11.What does a capacitor do? (a) turns a fan or wheels (b) has coloured bands (c) senses how bright it is (d) stores a little charge
  12. 12.True or false: a diode lets current go one way. (a) True (b) False
  13. 13.🧩 Which component stores a little charge? (a) resistor (b) motor (c) capacitor (d) LED
  14. 14.🧩 Which component lets current go one way? (a) buzzer (b) LDR (c) diode (d) potentiometer
  15. 15.🧩 Which component blows if current is high? (a) diode (b) capacitor (c) buzzer (d) fuse
  16. 16.True or false: a buzzer beeps for an alarm. (a) False (b) True
  17. 17.🧩 Which component turns a fan or wheels? (a) thermistor (b) diode (c) motor (d) LDR
  18. 18.True or false: an LDR senses how bright it is. (a) False (b) True
  19. 19.What does a resistor do? (a) beeps for an alarm (b) turns a fan or wheels (c) senses how hot it is (d) has coloured bands
  20. 20.True or false: an LDR blows if current is high. (a) True (b) False
  21. 21.True or false: a resistor limits the current. (a) True (b) False
  22. 22.True or false: an LDR makes things spin. (a) True (b) False
  23. 23.🧩 Which component is a resistance knob? (a) potentiometer (b) buzzer (c) resistor (d) capacitor
  24. 24.What does a potentiometer do? (a) beeps for an alarm (b) lets current go one way (c) limits the current (d) is a resistance knob
  25. 25.🧩 Which component boosts a small signal? (a) diode (b) transistor (c) thermistor (d) LED
  26. 26.🧩 Which component glows using little power? (a) motor (b) LED (c) thermistor (d) resistor
  27. 27.🧩 Which component limits the current? (a) motor (b) LED (c) resistor (d) fuse
  28. 28.What does a resistor do? (a) makes things spin (b) smooths a wobbly supply (c) limits the current (d) blows if current is high
  29. 29.What does a fuse do? (a) turns a fan or wheels (b) glows using little power (c) blows if current is high (d) stores a little charge
  30. 30.True or false: a motor beeps for an alarm. (a) True (b) False
  31. 31.True or false: a resistor smooths a wobbly supply. (a) True (b) False
  32. 32.What does an LDR do? (a) boosts a small signal (b) senses how bright it is (c) is a resistance knob (d) limits the current
  33. 33.True or false: a fuse beeps for an alarm. (a) False (b) True
  34. 34.True or false: a fuse blows if current is high. (a) False (b) True
  35. 35.🧩 Which component makes things spin? (a) motor (b) LED (c) fuse (d) thermistor
  36. 36.True or false: a capacitor stores a little charge. (a) False (b) True
  37. 37.🧩 Which component beeps for an alarm? (a) LDR (b) transistor (c) buzzer (d) thermistor
  38. 38.🧩 Which component smooths a wobbly supply? (a) resistor (b) motor (c) LED (d) capacitor
  39. 39.What does an LED do? (a) makes a beeping sound (b) stores a little charge (c) smooths a wobbly supply (d) glows using little power
  40. 40.What does a buzzer do? (a) boosts a small signal (b) makes a beeping sound (c) stores a little charge (d) glows using little power

Answer key

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

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