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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 277 · 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 beeps for an alarm? (a) LED (b) LDR (c) transistor (d) buzzer
  2. 2.🧩 Which part changes electrical energy into sound? (a) a buzzer (b) a capacitor (c) a diode (d) a resistor
  3. 3.True or false: an LDR beeps for an alarm. (a) False (b) True
  4. 4.🧩 Which component blows if current is high? (a) thermistor (b) fuse (c) resistor (d) motor
  5. 5.What does a potentiometer do? (a) stores a little charge (b) makes a beeping sound (c) makes things spin (d) is a resistance knob
  6. 6.True or false: a diode senses how hot it is. (a) True (b) False
  7. 7.What does a buzzer do? (a) blows if current is high (b) smooths a wobbly supply (c) makes a beeping sound (d) turns a fan or wheels
  8. 8.True or false: a resistor limits the current. (a) False (b) True
  9. 9.🧩 A capacitor in a circuit can … (a) spin a wheel (b) make light (c) store charge briefly (d) measure heat
  10. 10.🧩 Which component boosts a small signal? (a) resistor (b) transistor (c) buzzer (d) potentiometer
  11. 11.🧩 Which component has coloured bands? (a) resistor (b) buzzer (c) LDR (d) diode
  12. 12.What does a transistor do? (a) senses how hot it is (b) stores a little charge (c) boosts a small signal (d) lets current go one way
  13. 13.🧩 Which component turns a fan or wheels? (a) LDR (b) motor (c) fuse (d) thermistor
  14. 14.True or false: a fuse boosts a small signal. (a) True (b) False
  15. 15.True or false: a buzzer has coloured bands. (a) True (b) False
  16. 16.True or false: a resistor makes a beeping sound. (a) True (b) False
  17. 17.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
  18. 18.True or false: a buzzer makes a beeping sound. (a) False (b) True
  19. 19.True or false: a resistor beeps for an alarm. (a) False (b) True
  20. 20.What does a motor do? (a) has coloured bands (b) stores a little charge (c) lets current go one way (d) makes things spin
  21. 21.🧩 Which component stores a little charge? (a) diode (b) LDR (c) resistor (d) capacitor
  22. 22.🧩 Which component makes a beeping sound? (a) buzzer (b) thermistor (c) capacitor (d) transistor
  23. 23.True or false: a capacitor stores a little charge. (a) False (b) True
  24. 24.True or false: a capacitor has coloured bands. (a) True (b) False
  25. 25.What does a thermistor do? (a) senses how hot it is (b) makes a beeping sound (c) turns a fan or wheels (d) stores a little charge
  26. 26.True or false: a motor has coloured bands. (a) False (b) True
  27. 27.🧩 Which component glows using little power? (a) transistor (b) capacitor (c) potentiometer (d) LED
  28. 28.🧩 Which part changes electrical energy into movement? (a) a motor (b) a resistor (c) an LED (d) a fuse
  29. 29.🧩 Which component lets current go one way? (a) fuse (b) LDR (c) motor (d) diode
  30. 30.What does a capacitor do? (a) makes things spin (b) smooths a wobbly supply (c) beeps for an alarm (d) turns a fan or wheels
  31. 31.What does an LED do? (a) is a resistance knob (b) makes things spin (c) glows using little power (d) smooths a wobbly supply
  32. 32.True or false: a capacitor makes things spin. (a) True (b) False
  33. 33.True or false: a resistor smooths a wobbly supply. (a) True (b) False
  34. 34.What does an LDR do? (a) senses how bright it is (b) is a resistance knob (c) has coloured bands (d) lets current go one way
  35. 35.True or false: a capacitor beeps for an alarm. (a) False (b) True
  36. 36.True or false: a transistor glows using little power. (a) True (b) False
  37. 37.🧩 Which component smooths a wobbly supply? (a) LDR (b) transistor (c) motor (d) capacitor
  38. 38.True or false: a capacitor blows if current is high. (a) False (b) True
  39. 39.True or false: a potentiometer makes things spin. (a) True (b) False
  40. 40.🧩 Which component is a resistance knob? (a) LED (b) buzzer (c) motor (d) potentiometer

Answer key

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

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