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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 665 · 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 component limits the current? (a) LED (b) buzzer (c) fuse (d) resistor
  2. 2.🧩 Which part changes electrical energy into movement? (a) a fuse (b) a resistor (c) a motor (d) an LED
  3. 3.True or false: a motor turns a fan or wheels. (a) False (b) True
  4. 4.What does a thermistor do? (a) blows if current is high (b) beeps for an alarm (c) senses how hot it is (d) glows using little power
  5. 5.What does a resistor do? (a) is a resistance knob (b) glows using little power (c) beeps for an alarm (d) has coloured bands
  6. 6.🧩 Which component makes a beeping sound? (a) potentiometer (b) buzzer (c) diode (d) capacitor
  7. 7.🧩 Which part changes electrical energy into sound? (a) a buzzer (b) a resistor (c) a diode (d) a capacitor
  8. 8.🧩 Which component stores a little charge? (a) motor (b) buzzer (c) capacitor (d) LED
  9. 9.🧩 Which component turns a fan or wheels? (a) motor (b) potentiometer (c) capacitor (d) transistor
  10. 10.🧩 Which component boosts a small signal? (a) resistor (b) thermistor (c) buzzer (d) transistor
  11. 11.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
  12. 12.What does a buzzer do? (a) smooths a wobbly supply (b) turns a fan or wheels (c) beeps for an alarm (d) boosts a small signal
  13. 13.True or false: an LDR has coloured bands. (a) True (b) False
  14. 14.🧩 Which component senses how hot it is? (a) capacitor (b) potentiometer (c) LED (d) thermistor
  15. 15.What does an LDR do? (a) senses how bright it is (b) blows if current is high (c) has coloured bands (d) stores a little charge
  16. 16.🧩 Which component has coloured bands? (a) fuse (b) LED (c) resistor (d) buzzer
  17. 17.🧩 A capacitor in a circuit can … (a) spin a wheel (b) measure heat (c) store charge briefly (d) make light
  18. 18.🧩 Which component blows if current is high? (a) thermistor (b) fuse (c) buzzer (d) LED
  19. 19.🧩 Which component glows using little power? (a) capacitor (b) LED (c) fuse (d) motor
  20. 20.🧩 Which component senses how bright it is? (a) resistor (b) diode (c) LDR (d) motor
  21. 21.What does a fuse do? (a) stores a little charge (b) boosts a small signal (c) lets current go one way (d) blows if current is high
  22. 22.True or false: a transistor boosts a small signal. (a) True (b) False
  23. 23.True or false: a potentiometer limits the current. (a) True (b) False
  24. 24.True or false: a capacitor stores a little charge. (a) True (b) False
  25. 25.What does a buzzer do? (a) lets current go one way (b) glows using little power (c) makes a beeping sound (d) stores a little charge
  26. 26.What does a potentiometer do? (a) smooths a wobbly supply (b) is a resistance knob (c) has coloured bands (d) senses how hot it is
  27. 27.True or false: a capacitor makes things spin. (a) False (b) True
  28. 28.🧩 Which component smooths a wobbly supply? (a) capacitor (b) fuse (c) motor (d) thermistor
  29. 29.True or false: a transistor limits the current. (a) False (b) True
  30. 30.True or false: a resistor lets current go one way. (a) True (b) False
  31. 31.True or false: an LED senses how hot it is. (a) True (b) False
  32. 32.What does a motor do? (a) has coloured bands (b) boosts a small signal (c) is a resistance knob (d) makes things spin
  33. 33.True or false: a diode 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.True or false: a motor stores a little charge. (a) False (b) True
  36. 36.True or false: a thermistor blows if current is high. (a) False (b) True
  37. 37.True or false: a resistor limits the current. (a) True (b) False
  38. 38.What does a resistor do? (a) smooths a wobbly supply (b) makes things spin (c) boosts a small signal (d) limits the current
  39. 39.True or false: a diode smooths a wobbly supply. (a) True (b) False
  40. 40.🧩 Which component beeps for an alarm? (a) thermistor (b) buzzer (c) LED (d) LDR

Answer key

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

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