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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 683 · 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 diode (c) a buzzer (d) a resistor
  2. 2.🧩 Which component boosts a small signal? (a) transistor (b) LDR (c) buzzer (d) LED
  3. 3.What does a potentiometer do? (a) senses how bright it is (b) is a resistance knob (c) makes things spin (d) boosts a small signal
  4. 4.🧩 Which component smooths a wobbly supply? (a) potentiometer (b) capacitor (c) transistor (d) motor
  5. 5.🧩 Which part changes electrical energy into movement? (a) a resistor (b) a motor (c) an LED (d) a fuse
  6. 6.True or false: an LDR senses how hot it is. (a) False (b) True
  7. 7.True or false: a resistor blows if current is high. (a) False (b) True
  8. 8.True or false: an LDR senses how bright it is. (a) False (b) True
  9. 9.True or false: a motor turns a fan or wheels. (a) False (b) True
  10. 10.What does a motor do? (a) stores a little charge (b) makes a beeping sound (c) is a resistance knob (d) makes things spin
  11. 11.🧩 Which component stores a little charge? (a) fuse (b) capacitor (c) LED (d) buzzer
  12. 12.What does a diode do? (a) blows if current is high (b) stores a little charge (c) lets current go one way (d) senses how hot it is
  13. 13.🧩 Which component beeps for an alarm? (a) thermistor (b) fuse (c) buzzer (d) capacitor
  14. 14.True or false: an LED glows using little power. (a) True (b) False
  15. 15.🧩 A capacitor in a circuit can … (a) make light (b) spin a wheel (c) store charge briefly (d) measure heat
  16. 16.What does a transistor do? (a) boosts a small signal (b) glows using little power (c) smooths a wobbly supply (d) makes things spin
  17. 17.🧩 Which component makes things spin? (a) resistor (b) transistor (c) motor (d) capacitor
  18. 18.True or false: a fuse blows if current is high. (a) True (b) False
  19. 19.True or false: a buzzer beeps for an alarm. (a) False (b) True
  20. 20.🧩 Which component has coloured bands? (a) resistor (b) buzzer (c) transistor (d) thermistor
  21. 21.What does a thermistor do? (a) has coloured bands (b) limits the current (c) blows if current is high (d) senses how hot it is
  22. 22.What does a resistor do? (a) stores a little charge (b) makes a beeping sound (c) turns a fan or wheels (d) has coloured bands
  23. 23.True or false: an LED limits the current. (a) True (b) False
  24. 24.True or false: a fuse is a resistance knob. (a) False (b) True
  25. 25.What does a buzzer do? (a) has coloured bands (b) makes a beeping sound (c) senses how bright it is (d) makes things spin
  26. 26.True or false: a resistor limits the current. (a) True (b) False
  27. 27.True or false: a transistor boosts a small signal. (a) True (b) False
  28. 28.🧩 Which component blows if current is high? (a) thermistor (b) motor (c) fuse (d) LDR
  29. 29.🧩 Which component senses how hot it is? (a) diode (b) LDR (c) thermistor (d) fuse
  30. 30.True or false: a capacitor smooths a wobbly supply. (a) True (b) False
  31. 31.What does an LDR do? (a) turns a fan or wheels (b) stores a little charge (c) makes a beeping sound (d) senses how bright it is
  32. 32.What does a capacitor do? (a) senses how bright it is (b) smooths a wobbly supply (c) senses how hot it is (d) beeps for an alarm
  33. 33.🧩 Which component turns a fan or wheels? (a) transistor (b) potentiometer (c) LDR (d) motor
  34. 34.True or false: a diode senses how bright it is. (a) False (b) True
  35. 35.True or false: a buzzer smooths a wobbly supply. (a) False (b) True
  36. 36.True or false: a diode smooths a wobbly supply. (a) False (b) True
  37. 37.🧩 Which component is a resistance knob? (a) thermistor (b) transistor (c) motor (d) potentiometer
  38. 38.🧩 Which component glows using little power? (a) capacitor (b) buzzer (c) LED (d) fuse
  39. 39.🧩 Which component limits the current? (a) resistor (b) capacitor (c) diode (d) LED
  40. 40.True or false: a buzzer senses how hot it is. (a) True (b) False

Answer key

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

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