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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 486 · 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 diode (c) a resistor (d) a buzzer
  2. 2.What does a diode do? (a) makes a beeping sound (b) makes things spin (c) stores a little charge (d) lets current go one way
  3. 3.🧩 Which part changes electrical energy into movement? (a) an LED (b) a fuse (c) a resistor (d) a motor
  4. 4.What does a resistor do? (a) turns a fan or wheels (b) smooths a wobbly supply (c) lets current go one way (d) limits the current
  5. 5.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
  6. 6.What does a motor do? (a) makes things spin (b) limits the current (c) senses how bright it is (d) senses how hot it is
  7. 7.True or false: a fuse turns a fan or wheels. (a) False (b) True
  8. 8.🧩 Which component is a resistance knob? (a) thermistor (b) resistor (c) potentiometer (d) capacitor
  9. 9.True or false: an LDR senses how bright it is. (a) False (b) True
  10. 10.🧩 Which component makes a beeping sound? (a) resistor (b) LDR (c) buzzer (d) potentiometer
  11. 11.🧩 Which component beeps for an alarm? (a) transistor (b) thermistor (c) capacitor (d) buzzer
  12. 12.🧩 Which component lets current go one way? (a) transistor (b) potentiometer (c) diode (d) resistor
  13. 13.True or false: a transistor smooths a wobbly supply. (a) True (b) False
  14. 14.What does a fuse do? (a) is a resistance knob (b) blows if current is high (c) has coloured bands (d) beeps for an alarm
  15. 15.True or false: a transistor boosts a small signal. (a) False (b) True
  16. 16.🧩 Which component boosts a small signal? (a) transistor (b) buzzer (c) thermistor (d) diode
  17. 17.True or false: a transistor limits the current. (a) False (b) True
  18. 18.🧩 Which component has coloured bands? (a) motor (b) resistor (c) buzzer (d) fuse
  19. 19.🧩 Which component stores a little charge? (a) buzzer (b) motor (c) fuse (d) capacitor
  20. 20.What does an LED do? (a) has coloured bands (b) makes things spin (c) glows using little power (d) makes a beeping sound
  21. 21.🧩 Which component senses how hot it is? (a) thermistor (b) transistor (c) LED (d) buzzer
  22. 22.What does a buzzer do? (a) senses how hot it is (b) makes things spin (c) beeps for an alarm (d) boosts a small signal
  23. 23.What does a capacitor do? (a) smooths a wobbly supply (b) makes things spin (c) lets current go one way (d) is a resistance knob
  24. 24.True or false: a diode lets current go one way. (a) False (b) True
  25. 25.True or false: an LDR has coloured bands. (a) False (b) True
  26. 26.What does a potentiometer do? (a) senses how bright it is (b) smooths a wobbly supply (c) is a resistance knob (d) blows if current is high
  27. 27.🧩 A capacitor in a circuit can … (a) make light (b) store charge briefly (c) measure heat (d) spin a wheel
  28. 28.True or false: an LED senses how bright it is. (a) True (b) False
  29. 29.True or false: an LED glows using little power. (a) False (b) True
  30. 30.True or false: a capacitor senses how bright it is. (a) True (b) False
  31. 31.What does a thermistor do? (a) boosts a small signal (b) lets current go one way (c) limits the current (d) senses how hot it is
  32. 32.True or false: a motor senses how hot it is. (a) True (b) False
  33. 33.What does an LDR do? (a) blows if current is high (b) makes a beeping sound (c) senses how bright it is (d) lets current go one way
  34. 34.True or false: a diode turns a fan or wheels. (a) False (b) True
  35. 35.🧩 Which component limits the current? (a) resistor (b) capacitor (c) motor (d) LDR
  36. 36.True or false: an LED makes things spin. (a) False (b) True
  37. 37.What does a transistor do? (a) senses how bright it is (b) smooths a wobbly supply (c) turns a fan or wheels (d) boosts a small signal
  38. 38.True or false: a resistor has coloured bands. (a) False (b) True
  39. 39.🧩 Which component turns a fan or wheels? (a) thermistor (b) capacitor (c) motor (d) LED
  40. 40.True or false: a potentiometer is a resistance knob. (a) True (b) False

Answer key

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

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