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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 658 · 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 potentiometer is a resistance knob. (a) False (b) True
  2. 2.What does a transistor do? (a) limits the current (b) blows if current is high (c) stores a little charge (d) boosts a small signal
  3. 3.🧩 Which component makes a beeping sound? (a) diode (b) capacitor (c) buzzer (d) fuse
  4. 4.🧩 Which component smooths a wobbly supply? (a) LDR (b) potentiometer (c) capacitor (d) diode
  5. 5.True or false: an LDR makes a beeping sound. (a) True (b) False
  6. 6.What does a thermistor do? (a) stores a little charge (b) smooths a wobbly supply (c) senses how hot it is (d) limits the current
  7. 7.True or false: a transistor limits the current. (a) False (b) True
  8. 8.What does a buzzer do? (a) senses how hot it is (b) makes a beeping sound (c) smooths a wobbly supply (d) stores a little charge
  9. 9.True or false: a diode glows using little power. (a) True (b) False
  10. 10.🧩 A capacitor in a circuit can … (a) make light (b) store charge briefly (c) measure heat (d) spin a wheel
  11. 11.True or false: a diode lets current go one way. (a) True (b) False
  12. 12.🧩 Which component turns a fan or wheels? (a) LED (b) resistor (c) motor (d) transistor
  13. 13.🧩 Which component stores a little charge? (a) buzzer (b) diode (c) motor (d) capacitor
  14. 14.True or false: an LDR lets current go one way. (a) False (b) True
  15. 15.🧩 Which part changes electrical energy into movement? (a) an LED (b) a resistor (c) a fuse (d) a motor
  16. 16.What does a resistor do? (a) beeps for an alarm (b) glows using little power (c) blows if current is high (d) limits the current
  17. 17.True or false: a resistor glows using little power. (a) False (b) True
  18. 18.What does a buzzer do? (a) blows if current is high (b) lets current go one way (c) smooths a wobbly supply (d) beeps for an alarm
  19. 19.🧩 Which component is a resistance knob? (a) resistor (b) buzzer (c) potentiometer (d) motor
  20. 20.True or false: a capacitor stores a little charge. (a) True (b) False
  21. 21.What does an LED do? (a) makes a beeping sound (b) stores a little charge (c) limits the current (d) glows using little power
  22. 22.🧩 Which component limits the current? (a) buzzer (b) transistor (c) motor (d) resistor
  23. 23.What does an LDR do? (a) senses how bright it is (b) boosts a small signal (c) glows using little power (d) makes a beeping sound
  24. 24.🧩 Which component blows if current is high? (a) fuse (b) transistor (c) thermistor (d) diode
  25. 25.True or false: a motor boosts a small signal. (a) True (b) False
  26. 26.🧩 Which component makes things spin? (a) buzzer (b) LED (c) potentiometer (d) motor
  27. 27.What does a motor do? (a) beeps for an alarm (b) turns a fan or wheels (c) smooths a wobbly supply (d) limits the current
  28. 28.True or false: a motor makes things spin. (a) False (b) True
  29. 29.🧩 Which part changes electrical energy into sound? (a) a buzzer (b) a resistor (c) a diode (d) a capacitor
  30. 30.True or false: a motor limits the current. (a) False (b) True
  31. 31.What does a motor do? (a) glows using little power (b) beeps for an alarm (c) makes things spin (d) makes a beeping sound
  32. 32.🧩 Which component glows using little power? (a) motor (b) resistor (c) LED (d) potentiometer
  33. 33.🧩 Which component boosts a small signal? (a) motor (b) fuse (c) transistor (d) thermistor
  34. 34.What does a diode do? (a) stores a little charge (b) senses how hot it is (c) lets current go one way (d) smooths a wobbly supply
  35. 35.🧩 Which component has coloured bands? (a) capacitor (b) motor (c) resistor (d) diode
  36. 36.True or false: a diode stores a little charge. (a) True (b) False
  37. 37.True or false: a buzzer makes a beeping sound. (a) False (b) True
  38. 38.What does a fuse do? (a) makes things spin (b) turns a fan or wheels (c) blows if current is high (d) glows using little power
  39. 39.🧩 Which component senses how hot it is? (a) LDR (b) fuse (c) thermistor (d) resistor
  40. 40.🧩 Which component beeps for an alarm? (a) motor (b) fuse (c) buzzer (d) capacitor

Answer key

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

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