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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 678 · 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) a resistor (b) an LED (c) a motor (d) a fuse
  2. 2.🧩 Which component makes a beeping sound? (a) buzzer (b) potentiometer (c) diode (d) resistor
  3. 3.What does a diode do? (a) blows if current is high (b) beeps for an alarm (c) limits the current (d) lets current go one way
  4. 4.🧩 Which component lets current go one way? (a) fuse (b) diode (c) thermistor (d) capacitor
  5. 5.🧩 Which part changes electrical energy into sound? (a) a buzzer (b) a diode (c) a resistor (d) a capacitor
  6. 6.What does a resistor do? (a) beeps for an alarm (b) is a resistance knob (c) makes a beeping sound (d) has coloured bands
  7. 7.🧩 Which component makes things spin? (a) diode (b) motor (c) resistor (d) capacitor
  8. 8.True or false: a thermistor senses how hot it is. (a) True (b) False
  9. 9.True or false: a transistor senses how bright it is. (a) False (b) True
  10. 10.True or false: a resistor limits the current. (a) True (b) False
  11. 11.True or false: an LDR turns a fan or wheels. (a) False (b) True
  12. 12.🧩 Which component glows using little power? (a) buzzer (b) LED (c) potentiometer (d) thermistor
  13. 13.🧩 A capacitor in a circuit can … (a) spin a wheel (b) measure heat (c) make light (d) store charge briefly
  14. 14.True or false: a resistor has coloured bands. (a) False (b) True
  15. 15.True or false: a resistor senses how hot it is. (a) True (b) False
  16. 16.What does a transistor do? (a) has coloured bands (b) blows if current is high (c) makes a beeping sound (d) boosts a small signal
  17. 17.🧩 Which component turns a fan or wheels? (a) potentiometer (b) transistor (c) diode (d) motor
  18. 18.True or false: an LED makes things spin. (a) False (b) True
  19. 19.🧩 Which component limits the current? (a) resistor (b) potentiometer (c) diode (d) motor
  20. 20.🧩 Which component blows if current is high? (a) resistor (b) LDR (c) fuse (d) capacitor
  21. 21.What does an LED do? (a) has coloured bands (b) lets current go one way (c) glows using little power (d) turns a fan or wheels
  22. 22.True or false: a thermistor lets current go one way. (a) True (b) False
  23. 23.What does a thermistor do? (a) has coloured bands (b) glows using little power (c) senses how hot it is (d) beeps for an alarm
  24. 24.True or false: a diode smooths a wobbly supply. (a) True (b) False
  25. 25.True or false: a motor lets current go one way. (a) False (b) True
  26. 26.What does a motor do? (a) senses how bright it is (b) smooths a wobbly supply (c) blows if current is high (d) turns a fan or wheels
  27. 27.True or false: an LDR makes things spin. (a) True (b) False
  28. 28.🧩 Which component is a resistance knob? (a) capacitor (b) buzzer (c) potentiometer (d) resistor
  29. 29.What does an LDR do? (a) senses how bright it is (b) boosts a small signal (c) lets current go one way (d) stores a little charge
  30. 30.True or false: a potentiometer stores a little charge. (a) False (b) True
  31. 31.True or false: an LDR lets current go one way. (a) False (b) True
  32. 32.🧩 Which component has coloured bands? (a) transistor (b) diode (c) LED (d) resistor
  33. 33.🧩 Which component senses how bright it is? (a) diode (b) resistor (c) LED (d) LDR
  34. 34.🧩 Which component senses how hot it is? (a) thermistor (b) transistor (c) resistor (d) capacitor
  35. 35.True or false: a motor limits the current. (a) False (b) True
  36. 36.🧩 Which component beeps for an alarm? (a) motor (b) potentiometer (c) buzzer (d) thermistor
  37. 37.True or false: a motor makes things spin. (a) False (b) True
  38. 38.🧩 Which component stores a little charge? (a) diode (b) capacitor (c) potentiometer (d) LDR
  39. 39.What does a motor do? (a) senses how bright it is (b) is a resistance knob (c) makes things spin (d) limits the current
  40. 40.True or false: a motor makes a beeping sound. (a) True (b) False

Answer key

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

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