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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 108 · 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 motor (b) a resistor (c) a fuse (d) an LED
  2. 2.What does a thermistor do? (a) is a resistance knob (b) beeps for an alarm (c) senses how hot it is (d) stores a little charge
  3. 3.What does an LED do? (a) smooths a wobbly supply (b) glows using little power (c) lets current go one way (d) senses how hot it is
  4. 4.True or false: a resistor lets current go one way. (a) False (b) True
  5. 5.🧩 Which part changes electrical energy into sound? (a) a buzzer (b) a resistor (c) a diode (d) a capacitor
  6. 6.What does an LDR do? (a) makes things spin (b) senses how hot it is (c) blows if current is high (d) senses how bright it is
  7. 7.🧩 Which component glows using little power? (a) motor (b) LED (c) diode (d) resistor
  8. 8.🧩 Which component has coloured bands? (a) LED (b) resistor (c) fuse (d) thermistor
  9. 9.🧩 Which component senses how hot it is? (a) LDR (b) resistor (c) diode (d) thermistor
  10. 10.🧩 A capacitor in a circuit can … (a) make light (b) measure heat (c) store charge briefly (d) spin a wheel
  11. 11.What does a capacitor do? (a) turns a fan or wheels (b) makes a beeping sound (c) glows using little power (d) stores a little charge
  12. 12.True or false: a capacitor lets current go one way. (a) True (b) False
  13. 13.True or false: a motor turns a fan or wheels. (a) True (b) False
  14. 14.🧩 Which component stores a little charge? (a) diode (b) capacitor (c) fuse (d) LED
  15. 15.True or false: a motor makes things spin. (a) True (b) False
  16. 16.True or false: an LDR makes a beeping sound. (a) False (b) True
  17. 17.What does a resistor do? (a) makes a beeping sound (b) blows if current is high (c) has coloured bands (d) beeps for an alarm
  18. 18.True or false: a transistor boosts a small signal. (a) True (b) False
  19. 19.What does a capacitor do? (a) limits the current (b) senses how hot it is (c) has coloured bands (d) smooths a wobbly supply
  20. 20.What does a fuse do? (a) blows if current is high (b) senses how hot it is (c) makes a beeping sound (d) beeps for an alarm
  21. 21.What does a diode do? (a) limits the current (b) makes a beeping sound (c) lets current go one way (d) smooths a wobbly supply
  22. 22.True or false: a fuse turns a fan or wheels. (a) False (b) True
  23. 23.What does a motor do? (a) makes things spin (b) beeps for an alarm (c) is a resistance knob (d) glows using little power
  24. 24.🧩 Which component blows if current is high? (a) diode (b) motor (c) LDR (d) fuse
  25. 25.True or false: a thermistor senses how bright it is. (a) True (b) False
  26. 26.🧩 Which component lets current go one way? (a) fuse (b) buzzer (c) capacitor (d) diode
  27. 27.What does a potentiometer do? (a) limits the current (b) is a resistance knob (c) senses how hot it is (d) boosts a small signal
  28. 28.True or false: an LED blows if current is high. (a) False (b) True
  29. 29.True or false: a fuse beeps for an alarm. (a) False (b) True
  30. 30.🧩 Which component boosts a small signal? (a) transistor (b) resistor (c) potentiometer (d) capacitor
  31. 31.True or false: a buzzer limits the current. (a) True (b) False
  32. 32.What does a buzzer do? (a) beeps for an alarm (b) lets current go one way (c) senses how hot it is (d) smooths a wobbly supply
  33. 33.True or false: a diode smooths a wobbly supply. (a) True (b) False
  34. 34.🧩 Which component smooths a wobbly supply? (a) transistor (b) capacitor (c) resistor (d) LDR
  35. 35.True or false: a potentiometer is a resistance knob. (a) False (b) True
  36. 36.True or false: a buzzer beeps for an alarm. (a) True (b) False
  37. 37.True or false: a potentiometer stores a little charge. (a) True (b) False
  38. 38.True or false: an LED limits the current. (a) False (b) True
  39. 39.True or false: a buzzer senses how bright it is. (a) False (b) True
  40. 40.True or false: a motor makes a beeping sound. (a) True (b) False

Answer key

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

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