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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 590 · 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.True or false: a buzzer smooths a wobbly supply. (a) True (b) False
  2. 2.🧩 Which component makes a beeping sound? (a) potentiometer (b) buzzer (c) resistor (d) thermistor
  3. 3.What does a diode do? (a) limits the current (b) glows using little power (c) lets current go one way (d) has coloured bands
  4. 4.True or false: a resistor smooths a wobbly supply. (a) True (b) False
  5. 5.🧩 Which part changes electrical energy into movement? (a) an LED (b) a resistor (c) a motor (d) a fuse
  6. 6.🧩 A capacitor in a circuit can … (a) make light (b) measure heat (c) store charge briefly (d) spin a wheel
  7. 7.True or false: a buzzer makes a beeping sound. (a) True (b) False
  8. 8.What does an LED do? (a) boosts a small signal (b) smooths a wobbly supply (c) glows using little power (d) has coloured bands
  9. 9.🧩 Which component has coloured bands? (a) motor (b) capacitor (c) resistor (d) potentiometer
  10. 10.What does a motor do? (a) turns a fan or wheels (b) is a resistance knob (c) smooths a wobbly supply (d) beeps for an alarm
  11. 11.True or false: a diode stores a little charge. (a) False (b) True
  12. 12.What does a thermistor do? (a) glows using little power (b) is a resistance knob (c) senses how hot it is (d) senses how bright it is
  13. 13.True or false: a motor turns a fan or wheels. (a) False (b) True
  14. 14.🧩 Which component senses how bright it is? (a) thermistor (b) LDR (c) capacitor (d) transistor
  15. 15.True or false: a resistor limits the current. (a) True (b) False
  16. 16.What does an LDR do? (a) makes a beeping sound (b) turns a fan or wheels (c) senses how bright it is (d) stores a little charge
  17. 17.🧩 Which component lets current go one way? (a) fuse (b) potentiometer (c) LED (d) diode
  18. 18.True or false: a fuse boosts a small signal. (a) True (b) False
  19. 19.What does a fuse do? (a) beeps for an alarm (b) stores a little charge (c) blows if current is high (d) senses how hot it is
  20. 20.🧩 Which component turns a fan or wheels? (a) diode (b) LED (c) fuse (d) motor
  21. 21.What does a motor do? (a) stores a little charge (b) limits the current (c) makes things spin (d) boosts a small signal
  22. 22.What does a buzzer do? (a) blows if current is high (b) has coloured bands (c) makes a beeping sound (d) glows using little power
  23. 23.True or false: a fuse blows if current is high. (a) False (b) True
  24. 24.True or false: a potentiometer limits the current. (a) True (b) False
  25. 25.🧩 Which component senses how hot it is? (a) thermistor (b) diode (c) potentiometer (d) transistor
  26. 26.True or false: a motor makes things spin. (a) True (b) False
  27. 27.True or false: a buzzer has coloured bands. (a) False (b) True
  28. 28.🧩 Which component makes things spin? (a) motor (b) diode (c) LDR (d) fuse
  29. 29.🧩 Which component limits the current? (a) resistor (b) transistor (c) thermistor (d) capacitor
  30. 30.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a diode (c) a resistor (d) a buzzer
  31. 31.🧩 Which component glows using little power? (a) capacitor (b) buzzer (c) LED (d) fuse
  32. 32.What does a transistor do? (a) has coloured bands (b) senses how hot it is (c) boosts a small signal (d) glows using little power
  33. 33.True or false: an LDR stores a little charge. (a) True (b) False
  34. 34.True or false: an LDR makes things spin. (a) True (b) False
  35. 35.What does a buzzer do? (a) turns a fan or wheels (b) smooths a wobbly supply (c) boosts a small signal (d) beeps for an alarm
  36. 36.🧩 Which component stores a little charge? (a) buzzer (b) diode (c) capacitor (d) LDR
  37. 37.True or false: a capacitor smooths a wobbly supply. (a) True (b) False
  38. 38.🧩 Which component blows if current is high? (a) fuse (b) LED (c) buzzer (d) LDR
  39. 39.True or false: an LED glows using little power. (a) False (b) True
  40. 40.🧩 Which component is a resistance knob? (a) buzzer (b) diode (c) potentiometer (d) capacitor

Answer key

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

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