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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 259 · 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 buzzer do? (a) beeps for an alarm (b) lets current go one way (c) limits the current (d) blows if current is high
  2. 2.True or false: a transistor blows if current is high. (a) True (b) False
  3. 3.🧩 Which component blows if current is high? (a) LDR (b) transistor (c) thermistor (d) fuse
  4. 4.🧩 Which component lets current go one way? (a) diode (b) capacitor (c) resistor (d) fuse
  5. 5.🧩 Which component stores a little charge? (a) LDR (b) transistor (c) thermistor (d) capacitor
  6. 6.🧩 Which part changes electrical energy into sound? (a) a diode (b) a resistor (c) a buzzer (d) a capacitor
  7. 7.🧩 A capacitor in a circuit can … (a) spin a wheel (b) make light (c) measure heat (d) store charge briefly
  8. 8.🧩 Which part changes electrical energy into movement? (a) an LED (b) a fuse (c) a resistor (d) a motor
  9. 9.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
  10. 10.🧩 Which component beeps for an alarm? (a) buzzer (b) potentiometer (c) resistor (d) LDR
  11. 11.True or false: a thermistor senses how hot it is. (a) False (b) True
  12. 12.What does a motor do? (a) turns a fan or wheels (b) senses how bright it is (c) glows using little power (d) smooths a wobbly supply
  13. 13.True or false: a buzzer makes a beeping sound. (a) True (b) False
  14. 14.What does a resistor do? (a) beeps for an alarm (b) limits the current (c) senses how bright it is (d) makes things spin
  15. 15.🧩 Which component makes things spin? (a) motor (b) fuse (c) thermistor (d) diode
  16. 16.What does a capacitor do? (a) smooths a wobbly supply (b) is a resistance knob (c) senses how bright it is (d) limits the current
  17. 17.What does a fuse do? (a) lets current go one way (b) makes a beeping sound (c) limits the current (d) blows if current is high
  18. 18.True or false: a potentiometer makes a beeping sound. (a) False (b) True
  19. 19.True or false: an LED makes things spin. (a) True (b) False
  20. 20.True or false: an LDR senses how bright it is. (a) True (b) False
  21. 21.True or false: a buzzer is a resistance knob. (a) False (b) True
  22. 22.What does a thermistor do? (a) senses how hot it is (b) senses how bright it is (c) beeps for an alarm (d) glows using little power
  23. 23.True or false: a transistor stores a little charge. (a) True (b) False
  24. 24.True or false: a transistor boosts a small signal. (a) False (b) True
  25. 25.True or false: a buzzer senses how bright it is. (a) True (b) False
  26. 26.What does a diode do? (a) makes a beeping sound (b) stores a little charge (c) lets current go one way (d) limits the current
  27. 27.🧩 Which component senses how hot it is? (a) thermistor (b) motor (c) transistor (d) fuse
  28. 28.True or false: a diode has coloured bands. (a) False (b) True
  29. 29.True or false: a motor senses how bright it is. (a) True (b) False
  30. 30.True or false: a fuse blows if current is high. (a) False (b) True
  31. 31.True or false: a diode boosts a small signal. (a) False (b) True
  32. 32.🧩 Which component smooths a wobbly supply? (a) buzzer (b) capacitor (c) fuse (d) transistor
  33. 33.True or false: a motor makes a beeping sound. (a) True (b) False
  34. 34.What does an LED do? (a) smooths a wobbly supply (b) senses how bright it is (c) glows using little power (d) is a resistance knob
  35. 35.🧩 Which component senses how bright it is? (a) capacitor (b) LDR (c) transistor (d) diode
  36. 36.🧩 Which component limits the current? (a) potentiometer (b) thermistor (c) resistor (d) diode
  37. 37.🧩 Which component glows using little power? (a) LED (b) diode (c) potentiometer (d) buzzer
  38. 38.True or false: a potentiometer is a resistance knob. (a) True (b) False
  39. 39.What does an LDR do? (a) has coloured bands (b) senses how bright it is (c) lets current go one way (d) boosts a small signal
  40. 40.What does a capacitor do? (a) lets current go one way (b) stores a little charge (c) turns a fan or wheels (d) senses how bright it is

Answer key

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

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