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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 395 · 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) diode (b) capacitor (c) LED (d) LDR
  2. 2.🧩 Which part changes electrical energy into movement? (a) a motor (b) a fuse (c) an LED (d) a resistor
  3. 3.🧩 Which component senses how hot it is? (a) thermistor (b) motor (c) fuse (d) diode
  4. 4.What does a buzzer do? (a) lets current go one way (b) makes a beeping sound (c) turns a fan or wheels (d) makes things spin
  5. 5.🧩 Which component has coloured bands? (a) potentiometer (b) diode (c) LED (d) resistor
  6. 6.🧩 Which component stores a little charge? (a) capacitor (b) LDR (c) motor (d) buzzer
  7. 7.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a capacitor (c) a buzzer (d) a diode
  8. 8.True or false: a transistor boosts a small signal. (a) True (b) False
  9. 9.🧩 Which component makes a beeping sound? (a) capacitor (b) diode (c) potentiometer (d) buzzer
  10. 10.🧩 A capacitor in a circuit can … (a) measure heat (b) store charge briefly (c) spin a wheel (d) make light
  11. 11.What does a resistor do? (a) boosts a small signal (b) makes a beeping sound (c) has coloured bands (d) makes things spin
  12. 12.What does a motor do? (a) makes things spin (b) limits the current (c) stores a little charge (d) beeps for an alarm
  13. 13.What does a resistor do? (a) lets current go one way (b) makes things spin (c) makes a beeping sound (d) limits the current
  14. 14.True or false: an LDR smooths a wobbly supply. (a) False (b) True
  15. 15.True or false: a resistor has coloured bands. (a) True (b) False
  16. 16.True or false: a buzzer makes things spin. (a) True (b) False
  17. 17.🧩 Which component lets current go one way? (a) capacitor (b) diode (c) buzzer (d) LDR
  18. 18.🧩 Which component limits the current? (a) thermistor (b) motor (c) resistor (d) fuse
  19. 19.🧩 Which component smooths a wobbly supply? (a) fuse (b) buzzer (c) motor (d) capacitor
  20. 20.🧩 Which component turns a fan or wheels? (a) motor (b) resistor (c) LED (d) potentiometer
  21. 21.True or false: a thermistor senses how hot it is. (a) True (b) False
  22. 22.True or false: a diode glows using little power. (a) False (b) True
  23. 23.True or false: a diode lets current go one way. (a) True (b) False
  24. 24.What does a fuse do? (a) beeps for an alarm (b) turns a fan or wheels (c) blows if current is high (d) smooths a wobbly supply
  25. 25.🧩 Which component beeps for an alarm? (a) fuse (b) transistor (c) buzzer (d) resistor
  26. 26.What does a thermistor do? (a) senses how bright it is (b) has coloured bands (c) limits the current (d) senses how hot it is
  27. 27.True or false: a transistor makes things spin. (a) False (b) True
  28. 28.What does an LDR do? (a) stores a little charge (b) senses how bright it is (c) glows using little power (d) senses how hot it is
  29. 29.True or false: a potentiometer is a resistance knob. (a) True (b) False
  30. 30.True or false: a potentiometer boosts a small signal. (a) False (b) True
  31. 31.True or false: a motor boosts a small signal. (a) False (b) True
  32. 32.🧩 Which component glows using little power? (a) LDR (b) thermistor (c) LED (d) diode
  33. 33.True or false: a potentiometer limits the current. (a) True (b) False
  34. 34.🧩 Which component is a resistance knob? (a) resistor (b) motor (c) buzzer (d) potentiometer
  35. 35.What does a potentiometer do? (a) makes things spin (b) is a resistance knob (c) senses how hot it is (d) boosts a small signal
  36. 36.True or false: a resistor is a resistance knob. (a) True (b) False
  37. 37.What does a motor do? (a) limits the current (b) glows using little power (c) blows if current is high (d) turns a fan or wheels
  38. 38.What does a diode do? (a) blows if current is high (b) glows using little power (c) lets current go one way (d) limits the current
  39. 39.What does a buzzer do? (a) senses how bright it is (b) turns a fan or wheels (c) blows if current is high (d) beeps for an alarm
  40. 40.True or false: an LED glows using little power. (a) True (b) False

Answer key

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

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