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Electronics Worksheet: Electronic Components

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

Answer key

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

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