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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 218 · 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 fuse (b) a resistor (c) a motor (d) an LED
  2. 2.What does a capacitor do? (a) has coloured bands (b) boosts a small signal (c) stores a little charge (d) turns a fan or wheels
  3. 3.🧩 A capacitor in a circuit can … (a) measure heat (b) spin a wheel (c) store charge briefly (d) make light
  4. 4.🧩 Which component stores a little charge? (a) LED (b) resistor (c) potentiometer (d) capacitor
  5. 5.🧩 Which component boosts a small signal? (a) transistor (b) buzzer (c) LDR (d) capacitor
  6. 6.True or false: a capacitor stores a little charge. (a) True (b) False
  7. 7.What does an LED do? (a) lets current go one way (b) glows using little power (c) senses how bright it is (d) smooths a wobbly supply
  8. 8.True or false: a fuse blows if current is high. (a) True (b) False
  9. 9.True or false: a capacitor senses how bright it is. (a) True (b) False
  10. 10.What does a thermistor do? (a) beeps for an alarm (b) lets current go one way (c) boosts a small signal (d) senses how hot it is
  11. 11.🧩 Which component senses how bright it is? (a) capacitor (b) buzzer (c) motor (d) LDR
  12. 12.True or false: a capacitor blows if current is high. (a) False (b) True
  13. 13.True or false: a buzzer limits the current. (a) False (b) True
  14. 14.🧩 Which component smooths a wobbly supply? (a) transistor (b) fuse (c) capacitor (d) potentiometer
  15. 15.True or false: a motor has coloured bands. (a) True (b) False
  16. 16.True or false: a resistor has coloured bands. (a) False (b) True
  17. 17.🧩 Which component is a resistance knob? (a) potentiometer (b) LED (c) buzzer (d) motor
  18. 18.What does a potentiometer do? (a) lets current go one way (b) boosts a small signal (c) stores a little charge (d) is a resistance knob
  19. 19.True or false: an LDR boosts a small signal. (a) False (b) True
  20. 20.True or false: a thermistor smooths a wobbly supply. (a) True (b) False
  21. 21.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a capacitor (c) a diode (d) a buzzer
  22. 22.🧩 Which component lets current go one way? (a) motor (b) capacitor (c) LED (d) diode
  23. 23.What does a buzzer do? (a) boosts a small signal (b) is a resistance knob (c) makes a beeping sound (d) has coloured bands
  24. 24.🧩 Which component glows using little power? (a) fuse (b) thermistor (c) LED (d) motor
  25. 25.What does a transistor do? (a) stores a little charge (b) limits the current (c) boosts a small signal (d) smooths a wobbly supply
  26. 26.What does a motor do? (a) turns a fan or wheels (b) stores a little charge (c) has coloured bands (d) beeps for an alarm
  27. 27.🧩 Which component blows if current is high? (a) resistor (b) potentiometer (c) motor (d) fuse
  28. 28.True or false: a fuse smooths a wobbly supply. (a) False (b) True
  29. 29.True or false: an LED is a resistance knob. (a) False (b) True
  30. 30.🧩 Which component has coloured bands? (a) resistor (b) potentiometer (c) thermistor (d) buzzer
  31. 31.True or false: an LDR senses how bright it is. (a) True (b) False
  32. 32.What does a fuse do? (a) glows using little power (b) lets current go one way (c) stores a little charge (d) blows if current is high
  33. 33.What does a motor do? (a) has coloured bands (b) makes things spin (c) blows if current is high (d) boosts a small signal
  34. 34.True or false: a transistor boosts a small signal. (a) False (b) True
  35. 35.True or false: a capacitor has coloured bands. (a) False (b) True
  36. 36.What does a resistor do? (a) senses how bright it is (b) blows if current is high (c) has coloured bands (d) glows using little power
  37. 37.What does a buzzer do? (a) beeps for an alarm (b) stores a little charge (c) senses how bright it is (d) boosts a small signal
  38. 38.🧩 Which component beeps for an alarm? (a) transistor (b) capacitor (c) LED (d) buzzer
  39. 39.True or false: a motor makes things spin. (a) True (b) False
  40. 40.🧩 Which component turns a fan or wheels? (a) LED (b) motor (c) transistor (d) capacitor

Answer key

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

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