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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 225 · 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 sound? (a) a capacitor (b) a buzzer (c) a resistor (d) a diode
  2. 2.True or false: a capacitor has coloured bands. (a) True (b) False
  3. 3.True or false: a thermistor has coloured bands. (a) True (b) False
  4. 4.True or false: a capacitor stores a little charge. (a) False (b) True
  5. 5.True or false: a thermistor smooths a wobbly supply. (a) True (b) False
  6. 6.What does a resistor do? (a) stores a little charge (b) has coloured bands (c) makes things spin (d) smooths a wobbly supply
  7. 7.🧩 Which component senses how hot it is? (a) thermistor (b) potentiometer (c) resistor (d) LED
  8. 8.True or false: a motor makes things spin. (a) False (b) True
  9. 9.🧩 Which component glows using little power? (a) transistor (b) LDR (c) thermistor (d) LED
  10. 10.True or false: a resistor limits the current. (a) True (b) False
  11. 11.True or false: a capacitor smooths a wobbly supply. (a) True (b) False
  12. 12.True or false: a transistor has coloured bands. (a) False (b) True
  13. 13.🧩 A capacitor in a circuit can … (a) store charge briefly (b) measure heat (c) make light (d) spin a wheel
  14. 14.🧩 Which component smooths a wobbly supply? (a) LDR (b) diode (c) LED (d) capacitor
  15. 15.🧩 Which component blows if current is high? (a) motor (b) diode (c) fuse (d) transistor
  16. 16.What does a thermistor do? (a) is a resistance knob (b) boosts a small signal (c) senses how hot it is (d) has coloured bands
  17. 17.🧩 Which component lets current go one way? (a) LDR (b) diode (c) LED (d) resistor
  18. 18.True or false: an LDR senses how bright it is. (a) True (b) False
  19. 19.🧩 Which component boosts a small signal? (a) transistor (b) LED (c) potentiometer (d) fuse
  20. 20.What does a capacitor do? (a) stores a little charge (b) has coloured bands (c) makes things spin (d) blows if current is high
  21. 21.🧩 Which part changes electrical energy into movement? (a) a resistor (b) a motor (c) a fuse (d) an LED
  22. 22.True or false: a motor has coloured bands. (a) True (b) False
  23. 23.What does a capacitor do? (a) lets current go one way (b) smooths a wobbly supply (c) makes a beeping sound (d) limits the current
  24. 24.What does a diode do? (a) has coloured bands (b) boosts a small signal (c) lets current go one way (d) makes things spin
  25. 25.What does a motor do? (a) glows using little power (b) makes things spin (c) has coloured bands (d) senses how bright it is
  26. 26.What does a buzzer do? (a) smooths a wobbly supply (b) makes a beeping sound (c) senses how bright it is (d) boosts a small signal
  27. 27.🧩 Which component beeps for an alarm? (a) resistor (b) thermistor (c) buzzer (d) fuse
  28. 28.🧩 Which component makes a beeping sound? (a) resistor (b) capacitor (c) LDR (d) buzzer
  29. 29.What does a potentiometer do? (a) senses how hot it is (b) makes a beeping sound (c) lets current go one way (d) is a resistance knob
  30. 30.True or false: an LED glows using little power. (a) False (b) True
  31. 31.True or false: a thermistor beeps for an alarm. (a) True (b) False
  32. 32.True or false: a fuse makes a beeping sound. (a) True (b) False
  33. 33.🧩 Which component stores a little charge? (a) capacitor (b) potentiometer (c) buzzer (d) fuse
  34. 34.What does a fuse do? (a) smooths a wobbly supply (b) makes things spin (c) glows using little power (d) blows if current is high
  35. 35.🧩 Which component limits the current? (a) resistor (b) LDR (c) buzzer (d) fuse
  36. 36.What does a transistor do? (a) boosts a small signal (b) turns a fan or wheels (c) limits the current (d) makes things spin
  37. 37.What does an LED do? (a) has coloured bands (b) glows using little power (c) senses how bright it is (d) stores a little charge
  38. 38.What does a buzzer do? (a) lets current go one way (b) blows if current is high (c) beeps for an alarm (d) has coloured bands
  39. 39.True or false: a transistor limits the current. (a) True (b) False
  40. 40.🧩 Which component turns a fan or wheels? (a) transistor (b) LED (c) capacitor (d) motor

Answer key

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

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