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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 222 · 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) motor (b) resistor (c) transistor (d) LED
  2. 2.🧩 Which component stores a little charge? (a) motor (b) LED (c) transistor (d) capacitor
  3. 3.🧩 Which component blows if current is high? (a) resistor (b) fuse (c) potentiometer (d) transistor
  4. 4.🧩 A capacitor in a circuit can … (a) measure heat (b) spin a wheel (c) store charge briefly (d) make light
  5. 5.True or false: a motor smooths a wobbly supply. (a) False (b) True
  6. 6.What does an LED do? (a) senses how hot it is (b) smooths a wobbly supply (c) glows using little power (d) makes a beeping sound
  7. 7.True or false: a thermistor senses how hot it is. (a) True (b) False
  8. 8.🧩 Which component makes a beeping sound? (a) resistor (b) capacitor (c) diode (d) buzzer
  9. 9.🧩 Which part changes electrical energy into movement? (a) a fuse (b) a motor (c) an LED (d) a resistor
  10. 10.True or false: a motor has coloured bands. (a) False (b) True
  11. 11.What does a potentiometer do? (a) makes things spin (b) stores a little charge (c) lets current go one way (d) is a resistance knob
  12. 12.True or false: a potentiometer is a resistance knob. (a) True (b) False
  13. 13.🧩 Which component boosts a small signal? (a) transistor (b) diode (c) motor (d) fuse
  14. 14.True or false: a motor stores a little charge. (a) False (b) True
  15. 15.🧩 Which component smooths a wobbly supply? (a) fuse (b) LDR (c) potentiometer (d) capacitor
  16. 16.True or false: a potentiometer smooths a wobbly supply. (a) True (b) False
  17. 17.What does a motor do? (a) boosts a small signal (b) turns a fan or wheels (c) has coloured bands (d) lets current go one way
  18. 18.True or false: a diode is a resistance knob. (a) False (b) True
  19. 19.🧩 Which component senses how hot it is? (a) fuse (b) motor (c) thermistor (d) LED
  20. 20.🧩 Which component lets current go one way? (a) resistor (b) capacitor (c) buzzer (d) diode
  21. 21.What does a motor do? (a) beeps for an alarm (b) makes things spin (c) limits the current (d) blows if current is high
  22. 22.🧩 Which component is a resistance knob? (a) fuse (b) thermistor (c) potentiometer (d) LED
  23. 23.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a buzzer (c) a diode (d) a capacitor
  24. 24.🧩 Which component turns a fan or wheels? (a) buzzer (b) motor (c) LDR (d) thermistor
  25. 25.True or false: a resistor makes things spin. (a) False (b) True
  26. 26.What does a fuse do? (a) beeps for an alarm (b) senses how bright it is (c) has coloured bands (d) blows if current is high
  27. 27.True or false: a thermistor beeps for an alarm. (a) False (b) True
  28. 28.True or false: a diode lets current go one way. (a) False (b) True
  29. 29.True or false: a capacitor glows using little power. (a) True (b) False
  30. 30.What does a buzzer do? (a) boosts a small signal (b) blows if current is high (c) stores a little charge (d) beeps for an alarm
  31. 31.True or false: a buzzer makes a beeping sound. (a) True (b) False
  32. 32.True or false: a fuse smooths a wobbly supply. (a) True (b) False
  33. 33.True or false: a transistor lets current go one way. (a) False (b) True
  34. 34.True or false: an LDR smooths a wobbly supply. (a) False (b) True
  35. 35.True or false: an LED glows using little power. (a) False (b) True
  36. 36.🧩 Which component senses how bright it is? (a) transistor (b) potentiometer (c) diode (d) LDR
  37. 37.What does a capacitor do? (a) blows if current is high (b) stores a little charge (c) limits the current (d) makes a beeping sound
  38. 38.What does a transistor do? (a) smooths a wobbly supply (b) boosts a small signal (c) beeps for an alarm (d) makes a beeping sound
  39. 39.True or false: a resistor senses how hot it is. (a) False (b) True
  40. 40.🧩 Which component makes things spin? (a) transistor (b) thermistor (c) LED (d) motor

Answer key

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

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