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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 207 · 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 glows using little power? (a) fuse (b) potentiometer (c) motor (d) LED
  2. 2.🧩 A capacitor in a circuit can … (a) measure heat (b) store charge briefly (c) make light (d) spin a wheel
  3. 3.🧩 Which component blows if current is high? (a) fuse (b) buzzer (c) LDR (d) capacitor
  4. 4.True or false: a resistor has coloured bands. (a) False (b) True
  5. 5.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a resistor (c) a diode (d) a buzzer
  6. 6.True or false: a transistor senses how hot it is. (a) True (b) False
  7. 7.What does a capacitor do? (a) stores a little charge (b) makes a beeping sound (c) blows if current is high (d) lets current go one way
  8. 8.True or false: a capacitor stores a little charge. (a) True (b) False
  9. 9.🧩 Which component makes a beeping sound? (a) LED (b) resistor (c) buzzer (d) fuse
  10. 10.🧩 Which component boosts a small signal? (a) thermistor (b) LDR (c) resistor (d) transistor
  11. 11.True or false: a fuse blows if current is high. (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) turns a fan or wheels
  13. 13.True or false: a thermistor lets current go one way. (a) True (b) False
  14. 14.🧩 Which component smooths a wobbly supply? (a) buzzer (b) capacitor (c) LDR (d) thermistor
  15. 15.What does a buzzer do? (a) beeps for an alarm (b) limits the current (c) is a resistance knob (d) stores a little charge
  16. 16.🧩 Which component makes things spin? (a) motor (b) thermistor (c) transistor (d) LDR
  17. 17.🧩 Which part changes electrical energy into movement? (a) a fuse (b) a motor (c) a resistor (d) an LED
  18. 18.True or false: an LDR senses how bright it is. (a) False (b) True
  19. 19.🧩 Which component has coloured bands? (a) motor (b) buzzer (c) resistor (d) capacitor
  20. 20.True or false: a diode stores a little charge. (a) True (b) False
  21. 21.🧩 Which component beeps for an alarm? (a) potentiometer (b) buzzer (c) transistor (d) LED
  22. 22.What does a transistor do? (a) limits the current (b) is a resistance knob (c) has coloured bands (d) boosts a small signal
  23. 23.True or false: a motor makes things spin. (a) True (b) False
  24. 24.What does an LDR do? (a) has coloured bands (b) is a resistance knob (c) senses how bright it is (d) glows using little power
  25. 25.True or false: a diode lets current go one way. (a) True (b) False
  26. 26.True or false: a buzzer beeps for an alarm. (a) True (b) False
  27. 27.What does a resistor do? (a) boosts a small signal (b) limits the current (c) senses how hot it is (d) blows if current is high
  28. 28.What does a motor do? (a) boosts a small signal (b) makes things spin (c) smooths a wobbly supply (d) senses how bright it is
  29. 29.🧩 Which component lets current go one way? (a) potentiometer (b) capacitor (c) resistor (d) diode
  30. 30.True or false: a transistor glows using little power. (a) False (b) True
  31. 31.True or false: a transistor beeps for an alarm. (a) False (b) True
  32. 32.What does a fuse do? (a) glows using little power (b) senses how bright it is (c) blows if current is high (d) limits the current
  33. 33.🧩 Which component limits the current? (a) motor (b) resistor (c) potentiometer (d) thermistor
  34. 34.What does an LED do? (a) limits the current (b) senses how hot it is (c) has coloured bands (d) glows using little power
  35. 35.🧩 Which component stores a little charge? (a) capacitor (b) transistor (c) LDR (d) buzzer
  36. 36.True or false: an LED beeps for an alarm. (a) False (b) True
  37. 37.True or false: a motor boosts a small signal. (a) True (b) False
  38. 38.🧩 Which component turns a fan or wheels? (a) LDR (b) potentiometer (c) motor (d) thermistor
  39. 39.True or false: a diode makes things spin. (a) True (b) False
  40. 40.🧩 Which component senses how bright it is? (a) resistor (b) LED (c) potentiometer (d) LDR

Answer key

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

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