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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 554 · 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) thermistor (b) motor (c) resistor (d) LDR
  2. 2.🧩 Which part changes electrical energy into sound? (a) a diode (b) a resistor (c) a buzzer (d) a capacitor
  3. 3.True or false: a resistor is a resistance knob. (a) False (b) True
  4. 4.True or false: a transistor glows using little power. (a) True (b) False
  5. 5.🧩 Which component turns a fan or wheels? (a) diode (b) resistor (c) LED (d) motor
  6. 6.🧩 A capacitor in a circuit can … (a) spin a wheel (b) store charge briefly (c) measure heat (d) make light
  7. 7.🧩 Which component blows if current is high? (a) thermistor (b) diode (c) LDR (d) fuse
  8. 8.🧩 Which component makes a beeping sound? (a) LED (b) buzzer (c) potentiometer (d) motor
  9. 9.🧩 Which component limits the current? (a) buzzer (b) resistor (c) potentiometer (d) fuse
  10. 10.True or false: a transistor is a resistance knob. (a) False (b) True
  11. 11.What does a diode do? (a) lets current go one way (b) is a resistance knob (c) senses how bright it is (d) senses how hot it is
  12. 12.True or false: a diode blows if current is high. (a) True (b) False
  13. 13.What does an LDR do? (a) makes things spin (b) stores a little charge (c) glows using little power (d) senses how bright it is
  14. 14.True or false: a potentiometer lets current go one way. (a) False (b) True
  15. 15.What does a potentiometer do? (a) glows using little power (b) boosts a small signal (c) is a resistance knob (d) senses how hot it is
  16. 16.🧩 Which component senses how hot it is? (a) LDR (b) thermistor (c) buzzer (d) fuse
  17. 17.True or false: a capacitor has coloured bands. (a) False (b) True
  18. 18.🧩 Which component smooths a wobbly supply? (a) diode (b) motor (c) capacitor (d) LDR
  19. 19.True or false: a transistor senses how hot it is. (a) True (b) False
  20. 20.🧩 Which component lets current go one way? (a) transistor (b) LDR (c) motor (d) diode
  21. 21.🧩 Which part changes electrical energy into movement? (a) a motor (b) a resistor (c) an LED (d) a fuse
  22. 22.True or false: a fuse makes a beeping sound. (a) True (b) False
  23. 23.What does a buzzer do? (a) blows if current is high (b) makes things spin (c) beeps for an alarm (d) is a resistance knob
  24. 24.What does a resistor do? (a) senses how bright it is (b) turns a fan or wheels (c) stores a little charge (d) limits the current
  25. 25.True or false: an LDR senses how bright it is. (a) True (b) False
  26. 26.🧩 Which component is a resistance knob? (a) capacitor (b) potentiometer (c) diode (d) resistor
  27. 27.True or false: a resistor limits the current. (a) False (b) True
  28. 28.True or false: a transistor limits the current. (a) False (b) True
  29. 29.True or false: a fuse blows if current is high. (a) False (b) True
  30. 30.What does a motor do? (a) makes a beeping sound (b) has coloured bands (c) stores a little charge (d) turns a fan or wheels
  31. 31.What does a transistor do? (a) senses how bright it is (b) senses how hot it is (c) limits the current (d) boosts a small signal
  32. 32.True or false: a diode lets current go one way. (a) False (b) True
  33. 33.True or false: a transistor boosts a small signal. (a) True (b) False
  34. 34.🧩 Which component glows using little power? (a) transistor (b) diode (c) potentiometer (d) LED
  35. 35.True or false: a buzzer lets current go one way. (a) True (b) False
  36. 36.What does a thermistor do? (a) glows using little power (b) beeps for an alarm (c) blows if current is high (d) senses how hot it is
  37. 37.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
  38. 38.🧩 Which component has coloured bands? (a) potentiometer (b) diode (c) resistor (d) buzzer
  39. 39.True or false: a transistor beeps for an alarm. (a) False (b) True
  40. 40.True or false: a buzzer beeps for an alarm. (a) False (b) True

Answer key

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

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