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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 243 · 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.🧩 A capacitor in a circuit can … (a) measure heat (b) spin a wheel (c) store charge briefly (d) make light
  2. 2.True or false: a resistor limits the current. (a) False (b) True
  3. 3.🧩 Which component makes a beeping sound? (a) buzzer (b) capacitor (c) thermistor (d) potentiometer
  4. 4.🧩 Which part changes electrical energy into movement? (a) a fuse (b) a resistor (c) an LED (d) a motor
  5. 5.True or false: a potentiometer beeps for an alarm. (a) False (b) True
  6. 6.True or false: a transistor boosts a small signal. (a) True (b) False
  7. 7.What does a buzzer do? (a) senses how bright it is (b) has coloured bands (c) lets current go one way (d) makes a beeping sound
  8. 8.🧩 Which component makes things spin? (a) motor (b) fuse (c) transistor (d) capacitor
  9. 9.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a buzzer (c) a diode (d) a resistor
  10. 10.What does a diode do? (a) beeps for an alarm (b) turns a fan or wheels (c) lets current go one way (d) blows if current is high
  11. 11.True or false: a buzzer limits the current. (a) True (b) False
  12. 12.What does a potentiometer do? (a) limits the current (b) is a resistance knob (c) makes things spin (d) makes a beeping sound
  13. 13.True or false: a buzzer has coloured bands. (a) False (b) True
  14. 14.True or false: a resistor has coloured bands. (a) False (b) True
  15. 15.True or false: a buzzer makes a beeping sound. (a) False (b) True
  16. 16.🧩 Which component glows using little power? (a) buzzer (b) LED (c) LDR (d) fuse
  17. 17.🧩 Which component stores a little charge? (a) capacitor (b) LED (c) potentiometer (d) resistor
  18. 18.🧩 Which component senses how bright it is? (a) LED (b) LDR (c) diode (d) transistor
  19. 19.🧩 Which component turns a fan or wheels? (a) motor (b) transistor (c) capacitor (d) buzzer
  20. 20.What does an LDR do? (a) makes a beeping sound (b) turns a fan or wheels (c) senses how bright it is (d) makes things spin
  21. 21.🧩 Which component boosts a small signal? (a) motor (b) LED (c) transistor (d) buzzer
  22. 22.What does a resistor do? (a) stores a little charge (b) limits the current (c) senses how bright it is (d) makes things spin
  23. 23.What does an LED do? (a) lets current go one way (b) makes a beeping sound (c) blows if current is high (d) glows using little power
  24. 24.🧩 Which component has coloured bands? (a) LED (b) diode (c) transistor (d) resistor
  25. 25.True or false: a potentiometer turns a fan or wheels. (a) True (b) False
  26. 26.🧩 Which component senses how hot it is? (a) LED (b) thermistor (c) resistor (d) buzzer
  27. 27.What does a resistor do? (a) has coloured bands (b) glows using little power (c) senses how hot it is (d) makes things spin
  28. 28.What does a motor do? (a) smooths a wobbly supply (b) beeps for an alarm (c) senses how hot it is (d) makes things spin
  29. 29.True or false: a buzzer beeps for an alarm. (a) True (b) False
  30. 30.What does a fuse do? (a) boosts a small signal (b) glows using little power (c) blows if current is high (d) lets current go one way
  31. 31.What does a thermistor do? (a) senses how hot it is (b) boosts a small signal (c) glows using little power (d) limits the current
  32. 32.🧩 Which component blows if current is high? (a) transistor (b) diode (c) capacitor (d) fuse
  33. 33.True or false: a thermistor boosts a small signal. (a) True (b) False
  34. 34.True or false: a transistor makes a beeping sound. (a) False (b) True
  35. 35.What does a motor do? (a) lets current go one way (b) glows using little power (c) beeps for an alarm (d) turns a fan or wheels
  36. 36.True or false: a motor turns a fan or wheels. (a) True (b) False
  37. 37.🧩 Which component beeps for an alarm? (a) potentiometer (b) motor (c) buzzer (d) transistor
  38. 38.🧩 Which component limits the current? (a) diode (b) potentiometer (c) resistor (d) LED
  39. 39.True or false: a motor is a resistance knob. (a) False (b) True
  40. 40.🧩 Which component smooths a wobbly supply? (a) diode (b) capacitor (c) fuse (d) thermistor

Answer key

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

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