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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 347 · 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 part changes electrical energy into movement? (a) an LED (b) a fuse (c) a motor (d) a resistor
  2. 2.🧩 Which component has coloured bands? (a) potentiometer (b) resistor (c) LDR (d) LED
  3. 3.What does a capacitor do? (a) smooths a wobbly supply (b) glows using little power (c) turns a fan or wheels (d) limits the current
  4. 4.What does a transistor do? (a) boosts a small signal (b) blows if current is high (c) limits the current (d) lets current go one way
  5. 5.What does a potentiometer do? (a) makes things spin (b) limits the current (c) glows using little power (d) is a resistance knob
  6. 6.🧩 Which component senses how hot it is? (a) capacitor (b) motor (c) thermistor (d) LDR
  7. 7.🧩 Which component limits the current? (a) resistor (b) LED (c) capacitor (d) transistor
  8. 8.What does a capacitor do? (a) beeps for an alarm (b) makes things spin (c) turns a fan or wheels (d) stores a little charge
  9. 9.True or false: a motor turns a fan or wheels. (a) True (b) False
  10. 10.What does a fuse do? (a) senses how bright it is (b) smooths a wobbly supply (c) is a resistance knob (d) blows if current is high
  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 beeps for an alarm? (a) LED (b) motor (c) buzzer (d) resistor
  13. 13.True or false: a buzzer makes a beeping sound. (a) False (b) True
  14. 14.What does a thermistor do? (a) senses how bright it is (b) senses how hot it is (c) stores a little charge (d) turns a fan or wheels
  15. 15.🧩 Which component senses how bright it is? (a) LED (b) diode (c) fuse (d) LDR
  16. 16.True or false: a resistor limits the current. (a) False (b) True
  17. 17.What does a diode do? (a) lets current go one way (b) is a resistance knob (c) boosts a small signal (d) makes a beeping sound
  18. 18.True or false: an LED is a resistance knob. (a) False (b) True
  19. 19.🧩 Which component smooths a wobbly supply? (a) diode (b) potentiometer (c) thermistor (d) capacitor
  20. 20.What does an LED do? (a) limits the current (b) stores a little charge (c) glows using little power (d) senses how hot it is
  21. 21.True or false: a thermistor senses how bright it is. (a) True (b) False
  22. 22.🧩 Which component lets current go one way? (a) transistor (b) LED (c) diode (d) fuse
  23. 23.What does a buzzer do? (a) stores a little charge (b) boosts a small signal (c) glows using little power (d) beeps for an alarm
  24. 24.🧩 Which part changes electrical energy into sound? (a) a diode (b) a resistor (c) a capacitor (d) a buzzer
  25. 25.🧩 Which component glows using little power? (a) diode (b) fuse (c) thermistor (d) LED
  26. 26.True or false: a potentiometer is a resistance knob. (a) False (b) True
  27. 27.🧩 Which component is a resistance knob? (a) capacitor (b) potentiometer (c) buzzer (d) motor
  28. 28.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
  29. 29.What does a resistor do? (a) limits the current (b) glows using little power (c) makes a beeping sound (d) makes things spin
  30. 30.True or false: a diode blows if current is high. (a) True (b) False
  31. 31.True or false: a resistor glows using little power. (a) True (b) False
  32. 32.🧩 Which component makes things spin? (a) LDR (b) motor (c) diode (d) fuse
  33. 33.True or false: a thermistor turns a fan or wheels. (a) True (b) False
  34. 34.True or false: an LED glows using little power. (a) False (b) True
  35. 35.True or false: a motor senses how bright it is. (a) True (b) False
  36. 36.True or false: an LDR smooths a wobbly supply. (a) True (b) False
  37. 37.🧩 Which component makes a beeping sound? (a) buzzer (b) LED (c) thermistor (d) transistor
  38. 38.True or false: an LED turns a fan or wheels. (a) False (b) True
  39. 39.What does a buzzer do? (a) turns a fan or wheels (b) stores a little charge (c) makes a beeping sound (d) lets current go one way
  40. 40.True or false: a transistor boosts a small signal. (a) True (b) False

Answer key

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

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