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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 252 · 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.What does a potentiometer do? (a) senses how bright it is (b) glows using little power (c) is a resistance knob (d) senses how hot it is
  2. 2.🧩 Which part changes electrical energy into sound? (a) a buzzer (b) a capacitor (c) a resistor (d) a diode
  3. 3.True or false: a resistor limits the current. (a) True (b) False
  4. 4.What does an LED do? (a) blows if current is high (b) limits the current (c) smooths a wobbly supply (d) glows using little power
  5. 5.🧩 Which component senses how bright it is? (a) diode (b) motor (c) thermistor (d) LDR
  6. 6.What does a diode do? (a) makes things spin (b) lets current go one way (c) limits the current (d) glows using little power
  7. 7.What does a capacitor do? (a) turns a fan or wheels (b) stores a little charge (c) beeps for an alarm (d) makes a beeping sound
  8. 8.🧩 Which component senses how hot it is? (a) fuse (b) thermistor (c) buzzer (d) potentiometer
  9. 9.True or false: a capacitor smooths a wobbly supply. (a) True (b) False
  10. 10.🧩 A capacitor in a circuit can … (a) spin a wheel (b) store charge briefly (c) make light (d) measure heat
  11. 11.🧩 Which part changes electrical energy into movement? (a) a resistor (b) a fuse (c) a motor (d) an LED
  12. 12.True or false: a thermistor makes a beeping sound. (a) False (b) True
  13. 13.🧩 Which component makes a beeping sound? (a) motor (b) buzzer (c) thermistor (d) resistor
  14. 14.What does a buzzer do? (a) smooths a wobbly supply (b) turns a fan or wheels (c) makes a beeping sound (d) makes things spin
  15. 15.🧩 Which component beeps for an alarm? (a) thermistor (b) fuse (c) buzzer (d) LED
  16. 16.What does an LDR do? (a) senses how bright it is (b) senses how hot it is (c) has coloured bands (d) glows using little power
  17. 17.True or false: a thermistor senses how hot it is. (a) True (b) False
  18. 18.True or false: a thermistor makes things spin. (a) False (b) True
  19. 19.True or false: a resistor boosts a small signal. (a) True (b) False
  20. 20.True or false: a buzzer senses how bright it is. (a) True (b) False
  21. 21.🧩 Which component smooths a wobbly supply? (a) transistor (b) LED (c) diode (d) capacitor
  22. 22.What does a transistor do? (a) senses how bright it is (b) lets current go one way (c) smooths a wobbly supply (d) boosts a small signal
  23. 23.🧩 Which component lets current go one way? (a) fuse (b) resistor (c) diode (d) LED
  24. 24.True or false: a thermistor glows using little power. (a) False (b) True
  25. 25.What does a resistor do? (a) senses how hot it is (b) stores a little charge (c) has coloured bands (d) smooths a wobbly supply
  26. 26.True or false: an LED has coloured bands. (a) False (b) True
  27. 27.🧩 Which component blows if current is high? (a) motor (b) fuse (c) LED (d) thermistor
  28. 28.🧩 Which component stores a little charge? (a) motor (b) capacitor (c) buzzer (d) resistor
  29. 29.True or false: a motor turns a fan or wheels. (a) True (b) False
  30. 30.🧩 Which component glows using little power? (a) LED (b) resistor (c) LDR (d) potentiometer
  31. 31.What does a thermistor do? (a) senses how hot it is (b) glows using little power (c) makes things spin (d) smooths a wobbly supply
  32. 32.🧩 Which component makes things spin? (a) capacitor (b) motor (c) buzzer (d) fuse
  33. 33.🧩 Which component limits the current? (a) transistor (b) LED (c) resistor (d) diode
  34. 34.What does a capacitor do? (a) lets current go one way (b) makes a beeping sound (c) smooths a wobbly supply (d) turns a fan or wheels
  35. 35.True or false: a resistor has coloured bands. (a) False (b) True
  36. 36.True or false: a diode makes a beeping sound. (a) True (b) False
  37. 37.True or false: a thermistor senses how bright it is. (a) False (b) True
  38. 38.True or false: a fuse lets current go one way. (a) True (b) False
  39. 39.What does a motor do? (a) makes things spin (b) stores a little charge (c) blows if current is high (d) has coloured bands
  40. 40.🧩 Which component has coloured bands? (a) LDR (b) motor (c) resistor (d) thermistor

Answer key

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

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