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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 337 · 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) store charge briefly (b) make light (c) measure heat (d) spin a wheel
  2. 2.🧩 Which part changes electrical energy into movement? (a) an LED (b) a motor (c) a fuse (d) a resistor
  3. 3.True or false: a potentiometer has coloured bands. (a) True (b) False
  4. 4.What does a resistor do? (a) smooths a wobbly supply (b) glows using little power (c) turns a fan or wheels (d) has coloured bands
  5. 5.True or false: a motor glows using little power. (a) True (b) False
  6. 6.🧩 Which component has coloured bands? (a) potentiometer (b) diode (c) motor (d) resistor
  7. 7.True or false: a diode glows using little power. (a) True (b) False
  8. 8.True or false: a buzzer senses how bright it is. (a) False (b) True
  9. 9.🧩 Which component senses how hot it is? (a) fuse (b) transistor (c) LDR (d) thermistor
  10. 10.🧩 Which component makes things spin? (a) capacitor (b) diode (c) motor (d) thermistor
  11. 11.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
  12. 12.🧩 Which component glows using little power? (a) LED (b) fuse (c) motor (d) resistor
  13. 13.True or false: a motor has coloured bands. (a) False (b) True
  14. 14.🧩 Which component blows if current is high? (a) capacitor (b) thermistor (c) buzzer (d) fuse
  15. 15.What does an LDR do? (a) stores a little charge (b) senses how bright it is (c) has coloured bands (d) blows if current is high
  16. 16.🧩 Which component smooths a wobbly supply? (a) fuse (b) buzzer (c) capacitor (d) potentiometer
  17. 17.🧩 Which component beeps for an alarm? (a) resistor (b) transistor (c) motor (d) buzzer
  18. 18.🧩 Which component limits the current? (a) capacitor (b) resistor (c) transistor (d) fuse
  19. 19.🧩 Which component stores a little charge? (a) LED (b) transistor (c) buzzer (d) capacitor
  20. 20.True or false: a motor turns a fan or wheels. (a) True (b) False
  21. 21.True or false: a capacitor stores a little charge. (a) True (b) False
  22. 22.What does a transistor do? (a) makes a beeping sound (b) boosts a small signal (c) limits the current (d) makes things spin
  23. 23.True or false: a resistor is a resistance knob. (a) False (b) True
  24. 24.True or false: a transistor smooths a wobbly supply. (a) True (b) False
  25. 25.What does a capacitor do? (a) lets current go one way (b) smooths a wobbly supply (c) is a resistance knob (d) limits the current
  26. 26.True or false: an LDR senses how bright it is. (a) False (b) True
  27. 27.🧩 Which component is a resistance knob? (a) potentiometer (b) thermistor (c) LDR (d) resistor
  28. 28.🧩 Which component lets current go one way? (a) diode (b) capacitor (c) buzzer (d) resistor
  29. 29.What does a thermistor do? (a) limits the current (b) senses how hot it is (c) blows if current is high (d) makes a beeping sound
  30. 30.True or false: a fuse limits the current. (a) False (b) True
  31. 31.True or false: a resistor lets current go one way. (a) True (b) False
  32. 32.🧩 Which component makes a beeping sound? (a) motor (b) potentiometer (c) buzzer (d) thermistor
  33. 33.True or false: a transistor beeps for an alarm. (a) True (b) False
  34. 34.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a diode (c) a buzzer (d) a resistor
  35. 35.True or false: a diode senses how hot it is. (a) True (b) False
  36. 36.What does an LED do? (a) blows if current is high (b) boosts a small signal (c) lets current go one way (d) glows using little power
  37. 37.What does a motor do? (a) blows if current is high (b) makes things spin (c) glows using little power (d) limits the current
  38. 38.True or false: a transistor stores a little charge. (a) True (b) False
  39. 39.🧩 Which component turns a fan or wheels? (a) motor (b) LDR (c) LED (d) resistor
  40. 40.🧩 Which component boosts a small signal? (a) transistor (b) LDR (c) thermistor (d) fuse

Answer key

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

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