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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 276 · 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 movement? (a) a fuse (b) an LED (c) a motor (d) a resistor
  2. 2.🧩 Which component has coloured bands? (a) transistor (b) resistor (c) thermistor (d) potentiometer
  3. 3.🧩 Which component beeps for an alarm? (a) motor (b) LED (c) fuse (d) buzzer
  4. 4.What does a potentiometer do? (a) senses how bright it is (b) is a resistance knob (c) stores a little charge (d) senses how hot it is
  5. 5.True or false: a buzzer beeps for an alarm. (a) False (b) True
  6. 6.🧩 A capacitor in a circuit can … (a) measure heat (b) make light (c) spin a wheel (d) store charge briefly
  7. 7.True or false: a resistor has coloured bands. (a) True (b) False
  8. 8.What does a resistor do? (a) has coloured bands (b) senses how bright it is (c) stores a little charge (d) smooths a wobbly supply
  9. 9.True or false: a potentiometer senses how bright it is. (a) True (b) False
  10. 10.🧩 Which component senses how bright it is? (a) transistor (b) LED (c) motor (d) LDR
  11. 11.True or false: a buzzer makes a beeping sound. (a) True (b) False
  12. 12.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a resistor (c) a buzzer (d) a diode
  13. 13.What does a transistor do? (a) turns a fan or wheels (b) makes things spin (c) blows if current is high (d) boosts a small signal
  14. 14.What does a buzzer do? (a) has coloured bands (b) turns a fan or wheels (c) beeps for an alarm (d) makes things spin
  15. 15.🧩 Which component senses how hot it is? (a) resistor (b) potentiometer (c) thermistor (d) buzzer
  16. 16.True or false: a resistor stores a little charge. (a) True (b) False
  17. 17.🧩 Which component turns a fan or wheels? (a) diode (b) capacitor (c) LDR (d) motor
  18. 18.What does a thermistor do? (a) senses how hot it is (b) lets current go one way (c) blows if current is high (d) turns a fan or wheels
  19. 19.🧩 Which component stores a little charge? (a) LDR (b) capacitor (c) buzzer (d) diode
  20. 20.True or false: a motor makes things spin. (a) False (b) True
  21. 21.🧩 Which component makes a beeping sound? (a) potentiometer (b) transistor (c) resistor (d) buzzer
  22. 22.What does a diode do? (a) beeps for an alarm (b) lets current go one way (c) makes things spin (d) smooths a wobbly supply
  23. 23.🧩 Which component is a resistance knob? (a) buzzer (b) transistor (c) potentiometer (d) LED
  24. 24.True or false: a motor turns a fan or wheels. (a) False (b) True
  25. 25.What does a capacitor do? (a) blows if current is high (b) lets current go one way (c) smooths a wobbly supply (d) boosts a small signal
  26. 26.What does a motor do? (a) glows using little power (b) makes things spin (c) senses how bright it is (d) beeps for an alarm
  27. 27.True or false: a thermistor senses how hot it is. (a) False (b) True
  28. 28.What does an LDR do? (a) senses how bright it is (b) has coloured bands (c) senses how hot it is (d) turns a fan or wheels
  29. 29.🧩 Which component glows using little power? (a) diode (b) transistor (c) buzzer (d) LED
  30. 30.What does a fuse do? (a) boosts a small signal (b) has coloured bands (c) blows if current is high (d) turns a fan or wheels
  31. 31.🧩 Which component boosts a small signal? (a) thermistor (b) buzzer (c) capacitor (d) transistor
  32. 32.🧩 Which component makes things spin? (a) buzzer (b) thermistor (c) motor (d) diode
  33. 33.True or false: a motor boosts a small signal. (a) False (b) True
  34. 34.True or false: a diode glows using little power. (a) True (b) False
  35. 35.True or false: a transistor stores a little charge. (a) True (b) False
  36. 36.🧩 Which component lets current go one way? (a) diode (b) resistor (c) thermistor (d) LED
  37. 37.True or false: a thermistor limits the current. (a) False (b) True
  38. 38.True or false: a buzzer is a resistance knob. (a) False (b) True
  39. 39.What does an LED do? (a) senses how bright it is (b) makes a beeping sound (c) stores a little charge (d) glows using little power
  40. 40.🧩 Which component limits the current? (a) LDR (b) resistor (c) buzzer (d) potentiometer

Answer key

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

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