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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 498 · 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 has coloured bands? (a) potentiometer (b) resistor (c) thermistor (d) motor
  2. 2.🧩 A capacitor in a circuit can … (a) measure heat (b) make light (c) spin a wheel (d) store charge briefly
  3. 3.What does an LDR do? (a) smooths a wobbly supply (b) blows if current is high (c) senses how bright it is (d) makes a beeping sound
  4. 4.What does an LED do? (a) glows using little power (b) limits the current (c) has coloured bands (d) makes a beeping sound
  5. 5.True or false: a diode lets current go one way. (a) True (b) False
  6. 6.What does a diode do? (a) limits the current (b) lets current go one way (c) has coloured bands (d) blows if current is high
  7. 7.True or false: an LED senses how bright it is. (a) True (b) False
  8. 8.🧩 Which part changes electrical energy into movement? (a) a motor (b) a resistor (c) an LED (d) a fuse
  9. 9.🧩 Which component senses how hot it is? (a) fuse (b) motor (c) transistor (d) thermistor
  10. 10.🧩 Which component makes a beeping sound? (a) buzzer (b) motor (c) diode (d) LDR
  11. 11.What does a motor do? (a) glows using little power (b) turns a fan or wheels (c) limits the current (d) is a resistance knob
  12. 12.True or false: a motor blows if current is high. (a) False (b) True
  13. 13.🧩 Which component glows using little power? (a) resistor (b) LDR (c) LED (d) buzzer
  14. 14.🧩 Which component is a resistance knob? (a) thermistor (b) diode (c) transistor (d) potentiometer
  15. 15.True or false: a buzzer has coloured bands. (a) False (b) True
  16. 16.🧩 Which part changes electrical energy into sound? (a) a diode (b) a buzzer (c) a resistor (d) a capacitor
  17. 17.True or false: a resistor limits the current. (a) False (b) True
  18. 18.What does a fuse do? (a) turns a fan or wheels (b) smooths a wobbly supply (c) makes things spin (d) blows if current is high
  19. 19.True or false: an LED glows using little power. (a) True (b) False
  20. 20.True or false: a resistor has coloured bands. (a) True (b) False
  21. 21.🧩 Which component limits the current? (a) LDR (b) diode (c) motor (d) resistor
  22. 22.🧩 Which component makes things spin? (a) capacitor (b) LED (c) motor (d) transistor
  23. 23.🧩 Which component blows if current is high? (a) LDR (b) motor (c) transistor (d) fuse
  24. 24.🧩 Which component boosts a small signal? (a) transistor (b) fuse (c) thermistor (d) resistor
  25. 25.True or false: a thermistor lets current go one way. (a) True (b) False
  26. 26.True or false: a capacitor makes a beeping sound. (a) True (b) False
  27. 27.True or false: a capacitor stores a little charge. (a) False (b) True
  28. 28.True or false: an LDR senses how bright it is. (a) False (b) True
  29. 29.What does a resistor do? (a) is a resistance knob (b) senses how bright it is (c) has coloured bands (d) blows if current is high
  30. 30.What does a buzzer do? (a) is a resistance knob (b) senses how hot it is (c) limits the current (d) beeps for an alarm
  31. 31.What does a potentiometer do? (a) has coloured bands (b) is a resistance knob (c) stores a little charge (d) makes a beeping sound
  32. 32.What does a motor do? (a) stores a little charge (b) blows if current is high (c) has coloured bands (d) makes things spin
  33. 33.🧩 Which component smooths a wobbly supply? (a) LDR (b) fuse (c) capacitor (d) resistor
  34. 34.What does a thermistor do? (a) senses how bright it is (b) limits the current (c) senses how hot it is (d) turns a fan or wheels
  35. 35.True or false: a motor makes things spin. (a) True (b) False
  36. 36.What does a buzzer do? (a) turns a fan or wheels (b) is a resistance knob (c) makes a beeping sound (d) makes things spin
  37. 37.🧩 Which component turns a fan or wheels? (a) diode (b) potentiometer (c) motor (d) LDR
  38. 38.True or false: a potentiometer has coloured bands. (a) True (b) False
  39. 39.🧩 Which component lets current go one way? (a) potentiometer (b) diode (c) thermistor (d) resistor
  40. 40.True or false: a thermistor makes things spin. (a) False (b) True

Answer key

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

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