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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 147 · 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.True or false: a capacitor smooths a wobbly supply. (a) True (b) False
  2. 2.True or false: an LDR has coloured bands. (a) False (b) True
  3. 3.True or false: a thermistor is a resistance knob. (a) False (b) True
  4. 4.What does a capacitor do? (a) senses how bright it is (b) makes things spin (c) stores a little charge (d) boosts a small signal
  5. 5.🧩 Which part changes electrical energy into sound? (a) a buzzer (b) a capacitor (c) a diode (d) a resistor
  6. 6.What does a transistor do? (a) blows if current is high (b) senses how hot it is (c) boosts a small signal (d) glows using little power
  7. 7.🧩 Which component makes things spin? (a) motor (b) potentiometer (c) LED (d) diode
  8. 8.🧩 Which component limits the current? (a) motor (b) transistor (c) potentiometer (d) resistor
  9. 9.What does a capacitor do? (a) lets current go one way (b) beeps for an alarm (c) smooths a wobbly supply (d) glows using little power
  10. 10.🧩 A capacitor in a circuit can … (a) make light (b) spin a wheel (c) measure heat (d) store charge briefly
  11. 11.🧩 Which component glows using little power? (a) transistor (b) resistor (c) LED (d) diode
  12. 12.True or false: a capacitor stores a little charge. (a) False (b) True
  13. 13.🧩 Which component stores a little charge? (a) motor (b) LDR (c) capacitor (d) thermistor
  14. 14.True or false: a diode lets current go one way. (a) True (b) False
  15. 15.True or false: a thermistor makes a beeping sound. (a) True (b) False
  16. 16.True or false: an LED beeps for an alarm. (a) True (b) False
  17. 17.True or false: a thermistor senses how hot it is. (a) False (b) True
  18. 18.True or false: a buzzer makes a beeping sound. (a) False (b) True
  19. 19.True or false: a motor has coloured bands. (a) False (b) True
  20. 20.🧩 Which part changes electrical energy into movement? (a) an LED (b) a fuse (c) a motor (d) a resistor
  21. 21.🧩 Which component makes a beeping sound? (a) diode (b) buzzer (c) capacitor (d) thermistor
  22. 22.True or false: a transistor senses how bright it is. (a) False (b) True
  23. 23.What does a buzzer do? (a) makes a beeping sound (b) senses how hot it is (c) is a resistance knob (d) smooths a wobbly supply
  24. 24.What does a resistor do? (a) stores a little charge (b) turns a fan or wheels (c) limits the current (d) glows using little power
  25. 25.What does a diode do? (a) turns a fan or wheels (b) boosts a small signal (c) has coloured bands (d) lets current go one way
  26. 26.🧩 Which component smooths a wobbly supply? (a) LED (b) resistor (c) capacitor (d) LDR
  27. 27.What does a motor do? (a) senses how bright it is (b) has coloured bands (c) stores a little charge (d) turns a fan or wheels
  28. 28.True or false: a motor makes things spin. (a) False (b) True
  29. 29.What does a thermistor do? (a) limits the current (b) boosts a small signal (c) senses how hot it is (d) makes things spin
  30. 30.What does an LDR do? (a) has coloured bands (b) boosts a small signal (c) senses how bright it is (d) makes things spin
  31. 31.True or false: a diode glows using little power. (a) False (b) True
  32. 32.True or false: an LED lets current go one way. (a) False (b) True
  33. 33.True or false: a fuse blows if current is high. (a) True (b) False
  34. 34.True or false: a buzzer stores a little charge. (a) True (b) False
  35. 35.🧩 Which component lets current go one way? (a) thermistor (b) fuse (c) motor (d) diode
  36. 36.True or false: a motor glows using little power. (a) True (b) False
  37. 37.True or false: a fuse makes a beeping sound. (a) False (b) True
  38. 38.🧩 Which component senses how bright it is? (a) LDR (b) motor (c) thermistor (d) buzzer
  39. 39.What does a potentiometer do? (a) is a resistance knob (b) glows using little power (c) stores a little charge (d) limits the current
  40. 40.What does a motor do? (a) glows using little power (b) makes things spin (c) blows if current is high (d) lets current go one way

Answer key

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

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