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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 263 · 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 resistor do? (a) smooths a wobbly supply (b) stores a little charge (c) limits the current (d) turns a fan or wheels
  2. 2.🧩 Which component smooths a wobbly supply? (a) fuse (b) buzzer (c) LED (d) capacitor
  3. 3.What does an LED do? (a) smooths a wobbly supply (b) senses how bright it is (c) stores a little charge (d) glows using little power
  4. 4.True or false: a fuse is a resistance knob. (a) False (b) True
  5. 5.🧩 A capacitor in a circuit can … (a) make light (b) spin a wheel (c) store charge briefly (d) measure heat
  6. 6.🧩 Which component senses how bright it is? (a) LED (b) motor (c) LDR (d) buzzer
  7. 7.True or false: a capacitor stores a little charge. (a) True (b) False
  8. 8.True or false: an LDR senses how bright it is. (a) False (b) True
  9. 9.True or false: a transistor beeps for an alarm. (a) False (b) True
  10. 10.True or false: a resistor has coloured bands. (a) True (b) False
  11. 11.🧩 Which component blows if current is high? (a) capacitor (b) transistor (c) thermistor (d) fuse
  12. 12.🧩 Which part changes electrical energy into movement? (a) an LED (b) a fuse (c) a resistor (d) a motor
  13. 13.What does a transistor do? (a) beeps for an alarm (b) boosts a small signal (c) smooths a wobbly supply (d) has coloured bands
  14. 14.🧩 Which component limits the current? (a) diode (b) resistor (c) buzzer (d) potentiometer
  15. 15.🧩 Which component makes a beeping sound? (a) fuse (b) buzzer (c) resistor (d) LDR
  16. 16.What does a resistor do? (a) glows using little power (b) makes things spin (c) has coloured bands (d) lets current go one way
  17. 17.🧩 Which component is a resistance knob? (a) buzzer (b) motor (c) LED (d) potentiometer
  18. 18.True or false: an LED beeps for an alarm. (a) True (b) False
  19. 19.True or false: a resistor limits the current. (a) False (b) True
  20. 20.What does a capacitor do? (a) makes a beeping sound (b) limits the current (c) lets current go one way (d) smooths a wobbly supply
  21. 21.True or false: a transistor senses how hot it is. (a) True (b) False
  22. 22.What does a diode do? (a) smooths a wobbly supply (b) lets current go one way (c) is a resistance knob (d) makes a beeping sound
  23. 23.What does a fuse do? (a) blows if current is high (b) makes a beeping sound (c) is a resistance knob (d) makes things spin
  24. 24.What does a potentiometer do? (a) is a resistance knob (b) beeps for an alarm (c) senses how bright it is (d) limits the current
  25. 25.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a buzzer (c) a resistor (d) a diode
  26. 26.What does an LDR do? (a) senses how bright it is (b) makes things spin (c) limits the current (d) turns a fan or wheels
  27. 27.🧩 Which component lets current go one way? (a) motor (b) capacitor (c) LED (d) diode
  28. 28.🧩 Which component turns a fan or wheels? (a) capacitor (b) potentiometer (c) buzzer (d) motor
  29. 29.What does a buzzer do? (a) senses how bright it is (b) turns a fan or wheels (c) makes a beeping sound (d) has coloured bands
  30. 30.True or false: a buzzer beeps for an alarm. (a) False (b) True
  31. 31.🧩 Which component has coloured bands? (a) motor (b) resistor (c) capacitor (d) transistor
  32. 32.🧩 Which component senses how hot it is? (a) motor (b) thermistor (c) diode (d) capacitor
  33. 33.True or false: an LED stores a little charge. (a) True (b) False
  34. 34.🧩 Which component boosts a small signal? (a) LED (b) transistor (c) capacitor (d) motor
  35. 35.True or false: an LED makes a beeping sound. (a) True (b) False
  36. 36.What does a motor do? (a) turns a fan or wheels (b) is a resistance knob (c) limits the current (d) blows if current is high
  37. 37.What does a capacitor do? (a) makes things spin (b) stores a little charge (c) senses how hot it is (d) turns a fan or wheels
  38. 38.True or false: a motor turns a fan or wheels. (a) False (b) True
  39. 39.🧩 Which component makes things spin? (a) capacitor (b) buzzer (c) potentiometer (d) motor
  40. 40.🧩 Which component beeps for an alarm? (a) buzzer (b) motor (c) diode (d) transistor

Answer key

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

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