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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 587 · 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 motor has coloured bands. (a) False (b) True
  2. 2.🧩 A capacitor in a circuit can … (a) store charge briefly (b) spin a wheel (c) make light (d) measure heat
  3. 3.True or false: a motor glows using little power. (a) True (b) False
  4. 4.True or false: a transistor senses how bright it is. (a) False (b) True
  5. 5.True or false: a motor stores a little charge. (a) False (b) True
  6. 6.What does a fuse do? (a) lets current go one way (b) stores a little charge (c) blows if current is high (d) has coloured bands
  7. 7.🧩 Which component glows using little power? (a) capacitor (b) motor (c) potentiometer (d) LED
  8. 8.🧩 Which part changes electrical energy into movement? (a) an LED (b) a resistor (c) a motor (d) a fuse
  9. 9.True or false: a potentiometer glows using little power. (a) True (b) False
  10. 10.True or false: a thermistor glows using little power. (a) True (b) False
  11. 11.True or false: an LDR senses how bright it is. (a) False (b) True
  12. 12.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a diode (c) a buzzer (d) a resistor
  13. 13.True or false: a buzzer beeps for an alarm. (a) False (b) True
  14. 14.True or false: a potentiometer is a resistance knob. (a) False (b) True
  15. 15.🧩 Which component beeps for an alarm? (a) LED (b) buzzer (c) diode (d) capacitor
  16. 16.🧩 Which component boosts a small signal? (a) diode (b) LED (c) transistor (d) buzzer
  17. 17.What does a transistor do? (a) stores a little charge (b) blows if current is high (c) has coloured bands (d) boosts a small signal
  18. 18.🧩 Which component stores a little charge? (a) potentiometer (b) LED (c) capacitor (d) thermistor
  19. 19.True or false: a buzzer makes a beeping sound. (a) False (b) True
  20. 20.🧩 Which component has coloured bands? (a) resistor (b) potentiometer (c) LDR (d) fuse
  21. 21.🧩 Which component makes a beeping sound? (a) potentiometer (b) LDR (c) transistor (d) buzzer
  22. 22.True or false: an LED glows using little power. (a) True (b) False
  23. 23.True or false: a capacitor senses how hot it is. (a) True (b) False
  24. 24.What does an LDR do? (a) stores a little charge (b) has coloured bands (c) makes a beeping sound (d) senses how bright it is
  25. 25.True or false: a buzzer limits the current. (a) False (b) True
  26. 26.True or false: a resistor has coloured bands. (a) True (b) False
  27. 27.True or false: an LDR turns a fan or wheels. (a) True (b) False
  28. 28.What does a diode do? (a) limits the current (b) stores a little charge (c) boosts a small signal (d) lets current go one way
  29. 29.What does a potentiometer do? (a) senses how hot it is (b) glows using little power (c) turns a fan or wheels (d) is a resistance knob
  30. 30.What does a buzzer do? (a) stores a little charge (b) makes a beeping sound (c) senses how bright it is (d) boosts a small signal
  31. 31.🧩 Which component blows if current is high? (a) fuse (b) thermistor (c) capacitor (d) diode
  32. 32.What does a capacitor do? (a) stores a little charge (b) lets current go one way (c) has coloured bands (d) limits the current
  33. 33.🧩 Which component limits the current? (a) capacitor (b) thermistor (c) buzzer (d) resistor
  34. 34.What does a resistor do? (a) limits the current (b) beeps for an alarm (c) makes things spin (d) senses how hot it is
  35. 35.What does a resistor do? (a) makes a beeping sound (b) has coloured bands (c) smooths a wobbly supply (d) stores a little charge
  36. 36.True or false: a thermistor has coloured bands. (a) True (b) False
  37. 37.True or false: an LDR makes a beeping sound. (a) False (b) True
  38. 38.True or false: a potentiometer senses how hot it is. (a) True (b) False
  39. 39.What does a thermistor do? (a) turns a fan or wheels (b) senses how bright it is (c) senses how hot it is (d) makes a beeping sound
  40. 40.What does a motor do? (a) stores a little charge (b) limits the current (c) makes things spin (d) lets current go one way

Answer key

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

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