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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 522 · 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) store charge briefly (c) make light (d) spin a wheel
  2. 2.🧩 Which component glows using little power? (a) capacitor (b) transistor (c) LED (d) motor
  3. 3.🧩 Which component is a resistance knob? (a) capacitor (b) potentiometer (c) motor (d) transistor
  4. 4.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a capacitor (c) a buzzer (d) a diode
  5. 5.True or false: a buzzer beeps for an alarm. (a) True (b) False
  6. 6.What does a transistor do? (a) senses how hot it is (b) beeps for an alarm (c) is a resistance knob (d) boosts a small signal
  7. 7.🧩 Which part changes electrical energy into movement? (a) a fuse (b) a resistor (c) an LED (d) a motor
  8. 8.What does a diode do? (a) blows if current is high (b) lets current go one way (c) limits the current (d) turns a fan or wheels
  9. 9.🧩 Which component senses how hot it is? (a) diode (b) LED (c) motor (d) thermistor
  10. 10.True or false: an LED glows using little power. (a) False (b) True
  11. 11.🧩 Which component beeps for an alarm? (a) buzzer (b) resistor (c) motor (d) fuse
  12. 12.True or false: a motor makes a beeping sound. (a) True (b) False
  13. 13.🧩 Which component has coloured bands? (a) resistor (b) thermistor (c) buzzer (d) fuse
  14. 14.What does an LDR do? (a) stores a little charge (b) senses how bright it is (c) glows using little power (d) makes things spin
  15. 15.True or false: a motor turns a fan or wheels. (a) True (b) False
  16. 16.What does a fuse do? (a) turns a fan or wheels (b) glows using little power (c) has coloured bands (d) blows if current is high
  17. 17.What does a resistor do? (a) beeps for an alarm (b) makes things spin (c) limits the current (d) senses how bright it is
  18. 18.True or false: a resistor limits the current. (a) True (b) False
  19. 19.True or false: a diode lets current go one way. (a) False (b) True
  20. 20.True or false: a resistor has coloured bands. (a) True (b) False
  21. 21.🧩 Which component stores a little charge? (a) capacitor (b) buzzer (c) LED (d) LDR
  22. 22.What does a thermistor do? (a) beeps for an alarm (b) senses how hot it is (c) glows using little power (d) limits the current
  23. 23.🧩 Which component turns a fan or wheels? (a) diode (b) resistor (c) thermistor (d) motor
  24. 24.True or false: a capacitor smooths a wobbly supply. (a) True (b) False
  25. 25.What does a motor do? (a) boosts a small signal (b) turns a fan or wheels (c) blows if current is high (d) beeps for an alarm
  26. 26.What does a capacitor do? (a) makes a beeping sound (b) limits the current (c) blows if current is high (d) smooths a wobbly supply
  27. 27.🧩 Which component lets current go one way? (a) buzzer (b) potentiometer (c) diode (d) resistor
  28. 28.🧩 Which component blows if current is high? (a) motor (b) diode (c) buzzer (d) fuse
  29. 29.What does a buzzer do? (a) beeps for an alarm (b) senses how hot it is (c) limits the current (d) smooths a wobbly supply
  30. 30.True or false: a potentiometer is a resistance knob. (a) True (b) False
  31. 31.What does a potentiometer do? (a) makes a beeping sound (b) is a resistance knob (c) limits the current (d) senses how bright it is
  32. 32.🧩 Which component boosts a small signal? (a) transistor (b) LDR (c) thermistor (d) potentiometer
  33. 33.True or false: a diode makes a beeping sound. (a) False (b) True
  34. 34.True or false: a capacitor senses how bright it is. (a) True (b) False
  35. 35.What does an LED do? (a) glows using little power (b) senses how bright it is (c) boosts a small signal (d) makes things spin
  36. 36.🧩 Which component senses how bright it is? (a) buzzer (b) thermistor (c) motor (d) LDR
  37. 37.True or false: a thermistor senses how hot it is. (a) True (b) False
  38. 38.True or false: a diode smooths a wobbly supply. (a) True (b) False
  39. 39.True or false: a transistor boosts a small signal. (a) True (b) False
  40. 40.🧩 Which component makes things spin? (a) potentiometer (b) motor (c) thermistor (d) LED

Answer key

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

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