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Electronics Worksheet: Electronic Components

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

Answer key

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

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