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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 48 · 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.🧩 Which component senses how bright it is? (a) capacitor (b) resistor (c) transistor (d) LDR
  2. 2.🧩 Which component glows using little power? (a) diode (b) LDR (c) capacitor (d) LED
  3. 3.What does a diode do? (a) beeps for an alarm (b) glows using little power (c) lets current go one way (d) senses how hot it is
  4. 4.True or false: a potentiometer senses how bright it is. (a) True (b) False
  5. 5.True or false: a capacitor limits the current. (a) False (b) True
  6. 6.🧩 Which component has coloured bands? (a) thermistor (b) resistor (c) motor (d) capacitor
  7. 7.🧩 Which component boosts a small signal? (a) LDR (b) transistor (c) diode (d) thermistor
  8. 8.🧩 Which part changes electrical energy into movement? (a) an LED (b) a resistor (c) a fuse (d) a motor
  9. 9.🧩 Which component makes things spin? (a) buzzer (b) capacitor (c) motor (d) diode
  10. 10.True or false: a transistor boosts a small signal. (a) False (b) True
  11. 11.True or false: a resistor limits the current. (a) False (b) True
  12. 12.True or false: a buzzer makes a beeping sound. (a) False (b) True
  13. 13.What does an LED do? (a) glows using little power (b) is a resistance knob (c) lets current go one way (d) senses how bright it is
  14. 14.True or false: a capacitor smooths a wobbly supply. (a) True (b) False
  15. 15.True or false: a fuse blows if current is high. (a) False (b) True
  16. 16.🧩 Which component limits the current? (a) motor (b) capacitor (c) resistor (d) potentiometer
  17. 17.🧩 Which part changes electrical energy into sound? (a) a buzzer (b) a resistor (c) a diode (d) a capacitor
  18. 18.🧩 Which component smooths a wobbly supply? (a) thermistor (b) capacitor (c) resistor (d) motor
  19. 19.What does a capacitor do? (a) limits the current (b) makes a beeping sound (c) stores a little charge (d) blows if current is high
  20. 20.True or false: a motor is a resistance knob. (a) True (b) False
  21. 21.🧩 Which component blows if current is high? (a) transistor (b) fuse (c) capacitor (d) buzzer
  22. 22.🧩 Which component senses how hot it is? (a) potentiometer (b) thermistor (c) buzzer (d) fuse
  23. 23.True or false: a transistor senses how hot it is. (a) True (b) False
  24. 24.🧩 Which component lets current go one way? (a) LED (b) diode (c) LDR (d) thermistor
  25. 25.What does a buzzer do? (a) senses how bright it is (b) turns a fan or wheels (c) makes a beeping sound (d) lets current go one way
  26. 26.🧩 Which component turns a fan or wheels? (a) resistor (b) motor (c) LDR (d) diode
  27. 27.What does a transistor do? (a) boosts a small signal (b) has coloured bands (c) lets current go one way (d) turns a fan or wheels
  28. 28.🧩 Which component stores a little charge? (a) transistor (b) capacitor (c) diode (d) buzzer
  29. 29.What does an LDR do? (a) is a resistance knob (b) senses how hot it is (c) smooths a wobbly supply (d) senses how bright it is
  30. 30.🧩 A capacitor in a circuit can … (a) store charge briefly (b) measure heat (c) spin a wheel (d) make light
  31. 31.What does a motor do? (a) limits the current (b) smooths a wobbly supply (c) lets current go one way (d) turns a fan or wheels
  32. 32.True or false: a buzzer beeps for an alarm. (a) True (b) False
  33. 33.🧩 Which component makes a beeping sound? (a) diode (b) LED (c) buzzer (d) resistor
  34. 34.What does a resistor do? (a) has coloured bands (b) is a resistance knob (c) smooths a wobbly supply (d) makes things spin
  35. 35.True or false: a capacitor turns a fan or wheels. (a) False (b) True
  36. 36.True or false: an LED glows using little power. (a) False (b) True
  37. 37.True or false: a motor makes things spin. (a) False (b) True
  38. 38.What does a motor do? (a) glows using little power (b) stores a little charge (c) makes things spin (d) limits the current
  39. 39.True or false: an LDR senses how bright it is. (a) False (b) True
  40. 40.🧩 Which component beeps for an alarm? (a) buzzer (b) potentiometer (c) transistor (d) LDR

Answer key

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

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