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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 389 · 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 capacitor (b) a resistor (c) a diode (d) a buzzer
  2. 2.What does a fuse do? (a) glows using little power (b) lets current go one way (c) is a resistance knob (d) blows if current is high
  3. 3.🧩 Which component limits the current? (a) capacitor (b) motor (c) resistor (d) fuse
  4. 4.True or false: a fuse glows using little power. (a) False (b) True
  5. 5.True or false: a capacitor lets current go one way. (a) True (b) False
  6. 6.What does a resistor do? (a) smooths a wobbly supply (b) senses how hot it is (c) turns a fan or wheels (d) has coloured bands
  7. 7.True or false: a resistor has coloured bands. (a) True (b) False
  8. 8.🧩 Which component has coloured bands? (a) motor (b) resistor (c) potentiometer (d) LDR
  9. 9.🧩 Which component turns a fan or wheels? (a) LDR (b) resistor (c) LED (d) motor
  10. 10.True or false: a buzzer has coloured bands. (a) True (b) False
  11. 11.🧩 Which component glows using little power? (a) LED (b) thermistor (c) potentiometer (d) capacitor
  12. 12.What does a diode do? (a) turns a fan or wheels (b) limits the current (c) blows if current is high (d) lets current go one way
  13. 13.🧩 Which component smooths a wobbly supply? (a) buzzer (b) capacitor (c) LDR (d) LED
  14. 14.What does an LED do? (a) beeps for an alarm (b) stores a little charge (c) senses how bright it is (d) glows using little power
  15. 15.What does a transistor do? (a) lets current go one way (b) senses how bright it is (c) stores a little charge (d) boosts a small signal
  16. 16.True or false: a buzzer is a resistance knob. (a) False (b) True
  17. 17.What does a capacitor do? (a) lets current go one way (b) has coloured bands (c) makes a beeping sound (d) smooths a wobbly supply
  18. 18.True or false: a potentiometer makes things spin. (a) True (b) False
  19. 19.What does a potentiometer do? (a) makes a beeping sound (b) is a resistance knob (c) smooths a wobbly supply (d) makes things spin
  20. 20.True or false: a capacitor blows if current is high. (a) True (b) False
  21. 21.🧩 Which component lets current go one way? (a) transistor (b) diode (c) LDR (d) capacitor
  22. 22.🧩 Which component senses how bright it is? (a) transistor (b) capacitor (c) buzzer (d) LDR
  23. 23.🧩 Which part changes electrical energy into movement? (a) an LED (b) a motor (c) a fuse (d) a resistor
  24. 24.🧩 Which component is a resistance knob? (a) thermistor (b) LDR (c) potentiometer (d) transistor
  25. 25.True or false: a transistor smooths a wobbly supply. (a) False (b) True
  26. 26.True or false: a potentiometer is a resistance knob. (a) False (b) True
  27. 27.🧩 A capacitor in a circuit can … (a) spin a wheel (b) make light (c) store charge briefly (d) measure heat
  28. 28.What does a buzzer do? (a) blows if current is high (b) smooths a wobbly supply (c) senses how hot it is (d) makes a beeping sound
  29. 29.True or false: a capacitor turns a fan or wheels. (a) False (b) True
  30. 30.True or false: a buzzer beeps for an alarm. (a) True (b) False
  31. 31.True or false: an LED limits the current. (a) False (b) True
  32. 32.What does a motor do? (a) senses how bright it is (b) has coloured bands (c) beeps for an alarm (d) makes things spin
  33. 33.True or false: an LDR lets current go one way. (a) False (b) True
  34. 34.True or false: a thermistor senses how hot it is. (a) False (b) True
  35. 35.🧩 Which component stores a little charge? (a) capacitor (b) fuse (c) resistor (d) diode
  36. 36.True or false: a diode lets current go one way. (a) True (b) False
  37. 37.True or false: a diode stores a little charge. (a) False (b) True
  38. 38.🧩 Which component makes things spin? (a) capacitor (b) buzzer (c) transistor (d) motor
  39. 39.True or false: a thermistor makes things spin. (a) True (b) False
  40. 40.True or false: an LDR limits the current. (a) True (b) False

Answer key

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

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