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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 571 · 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) store charge briefly (b) spin a wheel (c) measure heat (d) make light
  2. 2.What does a motor do? (a) senses how bright it is (b) stores a little charge (c) is a resistance knob (d) turns a fan or wheels
  3. 3.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a diode (c) a capacitor (d) a buzzer
  4. 4.🧩 Which component stores a little charge? (a) fuse (b) capacitor (c) LED (d) LDR
  5. 5.🧩 Which component makes a beeping sound? (a) buzzer (b) fuse (c) transistor (d) capacitor
  6. 6.True or false: a resistor has coloured bands. (a) False (b) True
  7. 7.What does a fuse do? (a) limits the current (b) blows if current is high (c) makes things spin (d) has coloured bands
  8. 8.True or false: a potentiometer boosts a small signal. (a) False (b) True
  9. 9.What does an LDR do? (a) glows using little power (b) senses how bright it is (c) makes things spin (d) has coloured bands
  10. 10.What does a transistor do? (a) senses how hot it is (b) is a resistance knob (c) boosts a small signal (d) turns a fan or wheels
  11. 11.True or false: an LED glows using little power. (a) True (b) False
  12. 12.🧩 Which component boosts a small signal? (a) buzzer (b) transistor (c) thermistor (d) LED
  13. 13.What does a resistor do? (a) smooths a wobbly supply (b) is a resistance knob (c) stores a little charge (d) has coloured bands
  14. 14.True or false: a fuse is a resistance knob. (a) False (b) True
  15. 15.🧩 Which component has coloured bands? (a) transistor (b) resistor (c) LED (d) fuse
  16. 16.🧩 Which component limits the current? (a) LDR (b) resistor (c) capacitor (d) thermistor
  17. 17.🧩 Which part changes electrical energy into movement? (a) a motor (b) a resistor (c) an LED (d) a fuse
  18. 18.🧩 Which component turns a fan or wheels? (a) potentiometer (b) thermistor (c) capacitor (d) motor
  19. 19.What does an LED do? (a) beeps for an alarm (b) boosts a small signal (c) glows using little power (d) smooths a wobbly supply
  20. 20.🧩 Which component senses how bright it is? (a) LDR (b) motor (c) fuse (d) buzzer
  21. 21.True or false: a fuse beeps for an alarm. (a) True (b) False
  22. 22.True or false: a potentiometer glows using little power. (a) False (b) True
  23. 23.True or false: a diode senses how bright it is. (a) True (b) False
  24. 24.True or false: a diode turns a fan or wheels. (a) True (b) False
  25. 25.🧩 Which component glows using little power? (a) LED (b) LDR (c) capacitor (d) fuse
  26. 26.True or false: a thermistor turns a fan or wheels. (a) True (b) False
  27. 27.🧩 Which component is a resistance knob? (a) buzzer (b) potentiometer (c) resistor (d) fuse
  28. 28.What does a resistor do? (a) limits the current (b) glows using little power (c) stores a little charge (d) senses how hot it is
  29. 29.What does a thermistor do? (a) senses how hot it is (b) boosts a small signal (c) glows using little power (d) lets current go one way
  30. 30.True or false: a fuse has coloured bands. (a) False (b) True
  31. 31.True or false: a motor makes things spin. (a) False (b) True
  32. 32.True or false: a potentiometer makes a beeping sound. (a) False (b) True
  33. 33.What does a potentiometer do? (a) limits the current (b) is a resistance knob (c) lets current go one way (d) makes a beeping sound
  34. 34.🧩 Which component makes things spin? (a) potentiometer (b) motor (c) LDR (d) capacitor
  35. 35.True or false: a motor senses how hot it is. (a) True (b) False
  36. 36.What does a buzzer do? (a) has coloured bands (b) is a resistance knob (c) beeps for an alarm (d) limits the current
  37. 37.What does a buzzer do? (a) senses how hot it is (b) limits the current (c) is a resistance knob (d) makes a beeping sound
  38. 38.🧩 Which component lets current go one way? (a) capacitor (b) thermistor (c) potentiometer (d) diode
  39. 39.True or false: a buzzer makes a beeping sound. (a) True (b) False
  40. 40.What does a diode do? (a) senses how bright it is (b) lets current go one way (c) turns a fan or wheels (d) has coloured bands

Answer key

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

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