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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 518 · 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) potentiometer (b) thermistor (c) buzzer (d) resistor
  2. 2.🧩 Which part changes electrical energy into movement? (a) an LED (b) a fuse (c) a resistor (d) a motor
  3. 3.True or false: a resistor senses how hot it is. (a) False (b) True
  4. 4.What does a resistor do? (a) lets current go one way (b) glows using little power (c) limits the current (d) boosts a small signal
  5. 5.True or false: a motor smooths a wobbly supply. (a) False (b) True
  6. 6.True or false: a motor makes things spin. (a) True (b) False
  7. 7.True or false: a capacitor stores a little charge. (a) False (b) True
  8. 8.🧩 Which component boosts a small signal? (a) thermistor (b) LED (c) capacitor (d) transistor
  9. 9.True or false: a transistor blows if current is high. (a) False (b) True
  10. 10.What does a motor do? (a) boosts a small signal (b) limits the current (c) turns a fan or wheels (d) has coloured bands
  11. 11.What does a capacitor do? (a) stores a little charge (b) senses how bright it is (c) beeps for an alarm (d) lets current go one way
  12. 12.True or false: a fuse lets current go one way. (a) True (b) False
  13. 13.🧩 Which component blows if current is high? (a) potentiometer (b) thermistor (c) buzzer (d) fuse
  14. 14.True or false: a motor turns a fan or wheels. (a) True (b) False
  15. 15.🧩 Which component limits the current? (a) resistor (b) fuse (c) diode (d) buzzer
  16. 16.🧩 Which component lets current go one way? (a) diode (b) thermistor (c) resistor (d) buzzer
  17. 17.🧩 A capacitor in a circuit can … (a) spin a wheel (b) measure heat (c) make light (d) store charge briefly
  18. 18.What does an LED do? (a) glows using little power (b) smooths a wobbly supply (c) makes things spin (d) limits the current
  19. 19.🧩 Which component makes things spin? (a) resistor (b) capacitor (c) motor (d) transistor
  20. 20.True or false: a thermistor senses how hot it is. (a) True (b) False
  21. 21.What does a thermistor do? (a) smooths a wobbly supply (b) senses how hot it is (c) glows using little power (d) lets current go one way
  22. 22.What does a potentiometer do? (a) has coloured bands (b) senses how bright it is (c) glows using little power (d) is a resistance knob
  23. 23.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a capacitor (c) a diode (d) a buzzer
  24. 24.🧩 Which component is a resistance knob? (a) LED (b) potentiometer (c) LDR (d) thermistor
  25. 25.🧩 Which component senses how bright it is? (a) transistor (b) LDR (c) thermistor (d) buzzer
  26. 26.True or false: a transistor has coloured bands. (a) True (b) False
  27. 27.True or false: a capacitor has coloured bands. (a) True (b) False
  28. 28.True or false: a motor lets current go one way. (a) True (b) False
  29. 29.True or false: a buzzer makes a beeping sound. (a) True (b) False
  30. 30.🧩 Which component smooths a wobbly supply? (a) LED (b) fuse (c) capacitor (d) motor
  31. 31.🧩 Which component senses how hot it is? (a) motor (b) buzzer (c) thermistor (d) LED
  32. 32.What does a buzzer do? (a) lets current go one way (b) beeps for an alarm (c) senses how hot it is (d) is a resistance knob
  33. 33.What does a diode do? (a) blows if current is high (b) senses how bright it is (c) lets current go one way (d) beeps for an alarm
  34. 34.True or false: a fuse stores a little charge. (a) False (b) True
  35. 35.What does a buzzer do? (a) turns a fan or wheels (b) stores a little charge (c) makes a beeping sound (d) lets current go one way
  36. 36.True or false: a motor glows using little power. (a) True (b) False
  37. 37.What does a transistor do? (a) senses how hot it is (b) boosts a small signal (c) makes a beeping sound (d) makes things spin
  38. 38.🧩 Which component turns a fan or wheels? (a) buzzer (b) potentiometer (c) resistor (d) motor
  39. 39.True or false: an LDR boosts a small signal. (a) True (b) False
  40. 40.🧩 Which component has coloured bands? (a) LDR (b) resistor (c) diode (d) capacitor

Answer key

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

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