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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 261 · 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 smooths a wobbly supply? (a) thermistor (b) LED (c) capacitor (d) transistor
  2. 2.What does an LED do? (a) makes a beeping sound (b) senses how hot it is (c) makes things spin (d) glows using little power
  3. 3.What does a thermistor do? (a) boosts a small signal (b) senses how hot it is (c) stores a little charge (d) lets current go one way
  4. 4.🧩 Which component blows if current is high? (a) fuse (b) LED (c) motor (d) potentiometer
  5. 5.True or false: a transistor boosts a small signal. (a) True (b) False
  6. 6.What does a resistor do? (a) glows using little power (b) has coloured bands (c) blows if current is high (d) turns a fan or wheels
  7. 7.What does an LDR do? (a) limits the current (b) makes a beeping sound (c) is a resistance knob (d) senses how bright it is
  8. 8.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a buzzer (c) a diode (d) a resistor
  9. 9.🧩 Which component has coloured bands? (a) capacitor (b) thermistor (c) transistor (d) resistor
  10. 10.True or false: a fuse blows if current is high. (a) False (b) True
  11. 11.🧩 A capacitor in a circuit can … (a) make light (b) measure heat (c) store charge briefly (d) spin a wheel
  12. 12.🧩 Which component limits the current? (a) capacitor (b) transistor (c) LDR (d) resistor
  13. 13.🧩 Which component lets current go one way? (a) fuse (b) diode (c) LDR (d) thermistor
  14. 14.🧩 Which component senses how hot it is? (a) thermistor (b) LED (c) resistor (d) diode
  15. 15.🧩 Which component makes a beeping sound? (a) buzzer (b) LED (c) thermistor (d) LDR
  16. 16.What does a diode do? (a) lets current go one way (b) senses how hot it is (c) boosts a small signal (d) makes a beeping sound
  17. 17.True or false: a buzzer is a resistance knob. (a) True (b) False
  18. 18.True or false: a resistor boosts a small signal. (a) False (b) True
  19. 19.🧩 Which component turns a fan or wheels? (a) thermistor (b) motor (c) diode (d) resistor
  20. 20.🧩 Which component senses how bright it is? (a) capacitor (b) LDR (c) potentiometer (d) buzzer
  21. 21.True or false: an LED is a resistance knob. (a) False (b) True
  22. 22.What does a fuse do? (a) boosts a small signal (b) blows if current is high (c) limits the current (d) beeps for an alarm
  23. 23.True or false: an LDR blows if current is high. (a) True (b) False
  24. 24.🧩 Which part changes electrical energy into movement? (a) a motor (b) a resistor (c) an LED (d) a fuse
  25. 25.True or false: a motor stores a little charge. (a) False (b) True
  26. 26.What does a buzzer do? (a) stores a little charge (b) lets current go one way (c) makes things spin (d) beeps for an alarm
  27. 27.🧩 Which component makes things spin? (a) LED (b) potentiometer (c) motor (d) diode
  28. 28.True or false: an LDR senses how bright it is. (a) False (b) True
  29. 29.True or false: a motor turns a fan or wheels. (a) False (b) True
  30. 30.True or false: a capacitor makes things spin. (a) True (b) False
  31. 31.True or false: an LED glows using little power. (a) False (b) True
  32. 32.What does a motor do? (a) boosts a small signal (b) makes things spin (c) beeps for an alarm (d) limits the current
  33. 33.🧩 Which component beeps for an alarm? (a) potentiometer (b) buzzer (c) LDR (d) thermistor
  34. 34.True or false: a thermistor senses how hot it is. (a) True (b) False
  35. 35.🧩 Which component is a resistance knob? (a) motor (b) capacitor (c) potentiometer (d) thermistor
  36. 36.What does a motor do? (a) limits the current (b) turns a fan or wheels (c) makes a beeping sound (d) senses how hot it is
  37. 37.What does a transistor do? (a) beeps for an alarm (b) stores a little charge (c) boosts a small signal (d) senses how hot it is
  38. 38.True or false: a resistor has coloured bands. (a) False (b) True
  39. 39.True or false: a potentiometer beeps for an alarm. (a) True (b) False
  40. 40.True or false: a diode has coloured bands. (a) False (b) True

Answer key

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

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