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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 696 · 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) measure heat (b) spin a wheel (c) store charge briefly (d) make light
  2. 2.True or false: a motor is a resistance knob. (a) False (b) True
  3. 3.What does a motor do? (a) stores a little charge (b) has coloured bands (c) makes things spin (d) smooths a wobbly supply
  4. 4.🧩 Which component smooths a wobbly supply? (a) capacitor (b) resistor (c) diode (d) transistor
  5. 5.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a buzzer (c) a capacitor (d) a diode
  6. 6.🧩 Which component senses how hot it is? (a) diode (b) transistor (c) thermistor (d) potentiometer
  7. 7.What does a diode do? (a) is a resistance knob (b) lets current go one way (c) glows using little power (d) beeps for an alarm
  8. 8.True or false: a diode boosts a small signal. (a) False (b) True
  9. 9.True or false: a transistor smooths a wobbly supply. (a) True (b) False
  10. 10.What does a fuse do? (a) beeps for an alarm (b) makes things spin (c) is a resistance knob (d) blows if current is high
  11. 11.🧩 Which component has coloured bands? (a) resistor (b) diode (c) transistor (d) fuse
  12. 12.True or false: an LED senses how bright it is. (a) True (b) False
  13. 13.🧩 Which component stores a little charge? (a) LDR (b) thermistor (c) fuse (d) capacitor
  14. 14.🧩 Which part changes electrical energy into movement? (a) a fuse (b) a resistor (c) a motor (d) an LED
  15. 15.True or false: a resistor limits the current. (a) False (b) True
  16. 16.🧩 Which component boosts a small signal? (a) transistor (b) motor (c) thermistor (d) resistor
  17. 17.True or false: a fuse blows if current is high. (a) False (b) True
  18. 18.True or false: a capacitor turns a fan or wheels. (a) True (b) False
  19. 19.🧩 Which component is a resistance knob? (a) potentiometer (b) fuse (c) buzzer (d) motor
  20. 20.True or false: a transistor boosts a small signal. (a) True (b) False
  21. 21.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
  22. 22.🧩 Which component limits the current? (a) resistor (b) LED (c) thermistor (d) motor
  23. 23.True or false: an LDR has coloured bands. (a) False (b) True
  24. 24.True or false: a motor lets current go one way. (a) False (b) True
  25. 25.True or false: a buzzer makes a beeping sound. (a) True (b) False
  26. 26.What does a thermistor do? (a) senses how hot it is (b) stores a little charge (c) is a resistance knob (d) blows if current is high
  27. 27.🧩 Which component blows if current is high? (a) potentiometer (b) transistor (c) fuse (d) diode
  28. 28.True or false: a thermistor stores a little charge. (a) True (b) False
  29. 29.True or false: a resistor glows using little power. (a) True (b) False
  30. 30.What does a resistor do? (a) has coloured bands (b) makes things spin (c) beeps for an alarm (d) smooths a wobbly supply
  31. 31.What does an LDR do? (a) smooths a wobbly supply (b) boosts a small signal (c) turns a fan or wheels (d) senses how bright it is
  32. 32.True or false: a transistor glows using little power. (a) False (b) True
  33. 33.True or false: an LED blows if current is high. (a) True (b) False
  34. 34.🧩 Which component senses how bright it is? (a) thermistor (b) capacitor (c) transistor (d) LDR
  35. 35.What does a capacitor do? (a) makes a beeping sound (b) is a resistance knob (c) smooths a wobbly supply (d) blows if current is high
  36. 36.True or false: a buzzer beeps for an alarm. (a) False (b) True
  37. 37.🧩 Which component makes things spin? (a) transistor (b) motor (c) buzzer (d) LDR
  38. 38.True or false: an LED glows using little power. (a) True (b) False
  39. 39.True or false: a thermistor senses how bright it is. (a) True (b) False
  40. 40.True or false: a capacitor glows using little power. (a) True (b) False

Answer key

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

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