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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 267 · 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.What does a diode do? (a) senses how bright it is (b) lets current go one way (c) smooths a wobbly supply (d) makes a beeping sound
  2. 2.What does a buzzer do? (a) makes a beeping sound (b) makes things spin (c) limits the current (d) smooths a wobbly supply
  3. 3.🧩 Which component stores a little charge? (a) LDR (b) capacitor (c) motor (d) transistor
  4. 4.True or false: a potentiometer is a resistance knob. (a) False (b) True
  5. 5.🧩 Which component beeps for an alarm? (a) capacitor (b) buzzer (c) diode (d) LDR
  6. 6.🧩 Which part changes electrical energy into movement? (a) a fuse (b) a motor (c) a resistor (d) an LED
  7. 7.True or false: a capacitor stores a little charge. (a) True (b) False
  8. 8.🧩 Which component makes things spin? (a) resistor (b) potentiometer (c) capacitor (d) motor
  9. 9.What does a potentiometer do? (a) senses how bright it is (b) smooths a wobbly supply (c) has coloured bands (d) is a resistance knob
  10. 10.What does a motor do? (a) is a resistance knob (b) limits the current (c) beeps for an alarm (d) turns a fan or wheels
  11. 11.🧩 Which component glows using little power? (a) buzzer (b) LED (c) diode (d) resistor
  12. 12.🧩 Which component lets current go one way? (a) LDR (b) fuse (c) thermistor (d) diode
  13. 13.True or false: a diode lets current go one way. (a) False (b) True
  14. 14.🧩 Which component limits the current? (a) LDR (b) diode (c) LED (d) resistor
  15. 15.🧩 Which component makes a beeping sound? (a) LED (b) buzzer (c) capacitor (d) motor
  16. 16.What does a transistor do? (a) makes a beeping sound (b) boosts a small signal (c) turns a fan or wheels (d) stores a little charge
  17. 17.True or false: a capacitor has coloured bands. (a) False (b) True
  18. 18.True or false: a motor turns a fan or wheels. (a) True (b) False
  19. 19.What does a motor do? (a) makes things spin (b) lets current go one way (c) smooths a wobbly supply (d) glows using little power
  20. 20.🧩 Which component senses how bright it is? (a) resistor (b) LDR (c) capacitor (d) transistor
  21. 21.True or false: an LDR stores a little charge. (a) True (b) False
  22. 22.🧩 Which component smooths a wobbly supply? (a) potentiometer (b) transistor (c) motor (d) capacitor
  23. 23.True or false: a thermistor limits the current. (a) True (b) False
  24. 24.🧩 A capacitor in a circuit can … (a) spin a wheel (b) store charge briefly (c) measure heat (d) make light
  25. 25.True or false: a resistor has coloured bands. (a) False (b) True
  26. 26.What does a capacitor do? (a) lets current go one way (b) turns a fan or wheels (c) stores a little charge (d) makes a beeping sound
  27. 27.What does an LDR do? (a) senses how bright it is (b) blows if current is high (c) smooths a wobbly supply (d) is a resistance knob
  28. 28.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a buzzer (c) a capacitor (d) a diode
  29. 29.True or false: an LDR senses how bright it is. (a) False (b) True
  30. 30.True or false: an LED glows using little power. (a) True (b) False
  31. 31.What does an LED do? (a) senses how bright it is (b) has coloured bands (c) lets current go one way (d) glows using little power
  32. 32.True or false: a diode has coloured bands. (a) False (b) True
  33. 33.What does a thermistor do? (a) senses how hot it is (b) glows using little power (c) limits the current (d) lets current go one way
  34. 34.🧩 Which component turns a fan or wheels? (a) diode (b) motor (c) thermistor (d) buzzer
  35. 35.What does a fuse do? (a) is a resistance knob (b) stores a little charge (c) boosts a small signal (d) blows if current is high
  36. 36.True or false: a capacitor limits the current. (a) True (b) False
  37. 37.True or false: a transistor blows if current is high. (a) False (b) True
  38. 38.🧩 Which component has coloured bands? (a) fuse (b) LED (c) buzzer (d) resistor
  39. 39.True or false: a motor blows if current is high. (a) True (b) False
  40. 40.🧩 Which component boosts a small signal? (a) resistor (b) thermistor (c) transistor (d) buzzer

Answer key

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

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