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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 303 · 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 potentiometer do? (a) limits the current (b) senses how hot it is (c) stores a little charge (d) is a resistance knob
  2. 2.True or false: a resistor has coloured bands. (a) True (b) False
  3. 3.🧩 Which component has coloured bands? (a) resistor (b) diode (c) capacitor (d) buzzer
  4. 4.True or false: a motor senses how hot it is. (a) True (b) False
  5. 5.True or false: a fuse beeps for an alarm. (a) False (b) True
  6. 6.True or false: a potentiometer smooths a wobbly supply. (a) False (b) True
  7. 7.What does a resistor do? (a) makes things spin (b) glows using little power (c) has coloured bands (d) smooths a wobbly supply
  8. 8.🧩 Which part changes electrical energy into movement? (a) a resistor (b) a fuse (c) an LED (d) a motor
  9. 9.🧩 A capacitor in a circuit can … (a) store charge briefly (b) spin a wheel (c) make light (d) measure heat
  10. 10.What does a diode do? (a) boosts a small signal (b) senses how bright it is (c) makes a beeping sound (d) lets current go one way
  11. 11.True or false: an LED makes a beeping sound. (a) False (b) True
  12. 12.🧩 Which component makes a beeping sound? (a) resistor (b) LDR (c) buzzer (d) transistor
  13. 13.🧩 Which component lets current go one way? (a) fuse (b) resistor (c) transistor (d) diode
  14. 14.🧩 Which component senses how bright it is? (a) potentiometer (b) LDR (c) diode (d) capacitor
  15. 15.What does an LED do? (a) boosts a small signal (b) turns a fan or wheels (c) glows using little power (d) makes things spin
  16. 16.🧩 Which part changes electrical energy into sound? (a) a buzzer (b) a resistor (c) a diode (d) a capacitor
  17. 17.True or false: an LED glows using little power. (a) True (b) False
  18. 18.What does an LDR do? (a) boosts a small signal (b) senses how bright it is (c) glows using little power (d) turns a fan or wheels
  19. 19.🧩 Which component blows if current is high? (a) transistor (b) fuse (c) resistor (d) motor
  20. 20.What does a transistor do? (a) beeps for an alarm (b) senses how hot it is (c) boosts a small signal (d) limits the current
  21. 21.What does a thermistor do? (a) blows if current is high (b) lets current go one way (c) smooths a wobbly supply (d) senses how hot it is
  22. 22.True or false: a capacitor makes things spin. (a) True (b) False
  23. 23.What does a buzzer do? (a) turns a fan or wheels (b) glows using little power (c) makes a beeping sound (d) has coloured bands
  24. 24.🧩 Which component senses how hot it is? (a) capacitor (b) thermistor (c) motor (d) resistor
  25. 25.True or false: a transistor makes a beeping sound. (a) True (b) False
  26. 26.True or false: a diode has coloured bands. (a) False (b) True
  27. 27.🧩 Which component is a resistance knob? (a) capacitor (b) potentiometer (c) resistor (d) LDR
  28. 28.True or false: a buzzer makes a beeping sound. (a) False (b) True
  29. 29.🧩 Which component turns a fan or wheels? (a) LDR (b) fuse (c) motor (d) diode
  30. 30.True or false: a buzzer beeps for an alarm. (a) True (b) False
  31. 31.🧩 Which component stores a little charge? (a) motor (b) transistor (c) diode (d) capacitor
  32. 32.True or false: a motor limits the current. (a) True (b) False
  33. 33.True or false: a fuse limits the current. (a) True (b) False
  34. 34.🧩 Which component beeps for an alarm? (a) fuse (b) diode (c) LED (d) buzzer
  35. 35.🧩 Which component glows using little power? (a) thermistor (b) transistor (c) buzzer (d) LED
  36. 36.What does a buzzer do? (a) senses how hot it is (b) senses how bright it is (c) beeps for an alarm (d) turns a fan or wheels
  37. 37.True or false: a capacitor smooths a wobbly supply. (a) True (b) False
  38. 38.🧩 Which component smooths a wobbly supply? (a) thermistor (b) fuse (c) capacitor (d) buzzer
  39. 39.🧩 Which component limits the current? (a) diode (b) thermistor (c) resistor (d) motor
  40. 40.What does a capacitor do? (a) is a resistance knob (b) stores a little charge (c) has coloured bands (d) makes a beeping sound

Answer key

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

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