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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 544 · 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 diode (b) a resistor (c) a capacitor (d) a buzzer
  2. 2.What does an LDR do? (a) lets current go one way (b) makes a beeping sound (c) senses how bright it is (d) stores a little charge
  3. 3.🧩 Which component smooths a wobbly supply? (a) motor (b) fuse (c) transistor (d) capacitor
  4. 4.What does a thermistor do? (a) senses how hot it is (b) limits the current (c) makes a beeping sound (d) senses how bright it is
  5. 5.What does a potentiometer do? (a) limits the current (b) stores a little charge (c) lets current go one way (d) is a resistance knob
  6. 6.True or false: a capacitor senses how hot it is. (a) False (b) True
  7. 7.🧩 Which component senses how hot it is? (a) transistor (b) capacitor (c) potentiometer (d) thermistor
  8. 8.True or false: a motor makes things spin. (a) False (b) True
  9. 9.🧩 Which component beeps for an alarm? (a) LED (b) potentiometer (c) buzzer (d) capacitor
  10. 10.True or false: a diode beeps for an alarm. (a) False (b) True
  11. 11.True or false: a resistor beeps for an alarm. (a) True (b) False
  12. 12.What does a fuse do? (a) has coloured bands (b) is a resistance knob (c) blows if current is high (d) glows using little power
  13. 13.What does a capacitor do? (a) is a resistance knob (b) makes a beeping sound (c) blows if current is high (d) stores a little charge
  14. 14.True or false: a buzzer makes a beeping sound. (a) True (b) False
  15. 15.🧩 Which component stores a little charge? (a) LED (b) buzzer (c) capacitor (d) motor
  16. 16.True or false: a resistor senses how bright it is. (a) True (b) False
  17. 17.🧩 Which part changes electrical energy into movement? (a) a fuse (b) a resistor (c) a motor (d) an LED
  18. 18.🧩 A capacitor in a circuit can … (a) measure heat (b) make light (c) spin a wheel (d) store charge briefly
  19. 19.True or false: a capacitor is a resistance knob. (a) False (b) True
  20. 20.🧩 Which component is a resistance knob? (a) potentiometer (b) transistor (c) resistor (d) thermistor
  21. 21.True or false: a resistor limits the current. (a) True (b) False
  22. 22.True or false: a motor senses how hot it is. (a) True (b) False
  23. 23.🧩 Which component makes a beeping sound? (a) LDR (b) buzzer (c) thermistor (d) motor
  24. 24.🧩 Which component glows using little power? (a) transistor (b) resistor (c) buzzer (d) LED
  25. 25.🧩 Which component limits the current? (a) transistor (b) resistor (c) motor (d) diode
  26. 26.True or false: an LED beeps for an alarm. (a) False (b) True
  27. 27.What does a diode do? (a) blows if current is high (b) makes things spin (c) lets current go one way (d) boosts a small signal
  28. 28.What does a motor do? (a) senses how bright it is (b) makes things spin (c) senses how hot it is (d) blows if current is high
  29. 29.🧩 Which component boosts a small signal? (a) resistor (b) capacitor (c) motor (d) transistor
  30. 30.True or false: a thermistor blows if current is high. (a) True (b) False
  31. 31.🧩 Which component turns a fan or wheels? (a) LED (b) motor (c) potentiometer (d) LDR
  32. 32.🧩 Which component senses how bright it is? (a) LDR (b) LED (c) buzzer (d) diode
  33. 33.True or false: an LED glows using little power. (a) True (b) False
  34. 34.🧩 Which component makes things spin? (a) resistor (b) diode (c) buzzer (d) motor
  35. 35.🧩 Which component lets current go one way? (a) LDR (b) diode (c) LED (d) potentiometer
  36. 36.True or false: an LDR boosts a small signal. (a) True (b) False
  37. 37.What does a resistor do? (a) smooths a wobbly supply (b) beeps for an alarm (c) limits the current (d) turns a fan or wheels
  38. 38.What does an LED do? (a) glows using little power (b) has coloured bands (c) boosts a small signal (d) makes things spin
  39. 39.True or false: a buzzer beeps for an alarm. (a) True (b) False
  40. 40.True or false: a resistor has coloured bands. (a) False (b) True

Answer key

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

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