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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 146 · 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 resistor senses how hot it is. (a) False (b) True
  2. 2.What does a buzzer do? (a) beeps for an alarm (b) smooths a wobbly supply (c) has coloured bands (d) is a resistance knob
  3. 3.🧩 A capacitor in a circuit can … (a) make light (b) measure heat (c) spin a wheel (d) store charge briefly
  4. 4.What does an LDR do? (a) senses how hot it is (b) makes a beeping sound (c) senses how bright it is (d) is a resistance knob
  5. 5.🧩 Which component beeps for an alarm? (a) fuse (b) resistor (c) buzzer (d) thermistor
  6. 6.🧩 Which part changes electrical energy into movement? (a) a fuse (b) a motor (c) a resistor (d) an LED
  7. 7.What does a capacitor do? (a) makes a beeping sound (b) stores a little charge (c) turns a fan or wheels (d) lets current go one way
  8. 8.True or false: a capacitor has coloured bands. (a) False (b) True
  9. 9.True or false: a fuse blows if current is high. (a) False (b) True
  10. 10.🧩 Which component limits the current? (a) resistor (b) LDR (c) transistor (d) motor
  11. 11.True or false: a thermistor makes things spin. (a) False (b) True
  12. 12.🧩 Which component is a resistance knob? (a) thermistor (b) potentiometer (c) capacitor (d) resistor
  13. 13.True or false: a capacitor smooths a wobbly supply. (a) True (b) False
  14. 14.🧩 Which component blows if current is high? (a) thermistor (b) capacitor (c) transistor (d) fuse
  15. 15.True or false: a buzzer blows if current is high. (a) False (b) True
  16. 16.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a capacitor (c) a diode (d) a buzzer
  17. 17.True or false: a resistor has coloured bands. (a) False (b) True
  18. 18.What does a motor do? (a) makes a beeping sound (b) makes things spin (c) senses how bright it is (d) senses how hot it is
  19. 19.True or false: a fuse senses how hot it is. (a) True (b) False
  20. 20.🧩 Which component has coloured bands? (a) fuse (b) resistor (c) capacitor (d) thermistor
  21. 21.What does a potentiometer do? (a) is a resistance knob (b) senses how bright it is (c) limits the current (d) turns a fan or wheels
  22. 22.🧩 Which component glows using little power? (a) fuse (b) motor (c) LDR (d) LED
  23. 23.🧩 Which component senses how hot it is? (a) transistor (b) buzzer (c) thermistor (d) LED
  24. 24.What does a capacitor do? (a) turns a fan or wheels (b) makes things spin (c) smooths a wobbly supply (d) lets current go one way
  25. 25.🧩 Which component boosts a small signal? (a) motor (b) transistor (c) buzzer (d) fuse
  26. 26.True or false: a motor beeps for an alarm. (a) False (b) True
  27. 27.What does a transistor do? (a) boosts a small signal (b) glows using little power (c) senses how bright it is (d) turns a fan or wheels
  28. 28.🧩 Which component makes a beeping sound? (a) diode (b) potentiometer (c) buzzer (d) transistor
  29. 29.What does a diode do? (a) makes a beeping sound (b) lets current go one way (c) senses how hot it is (d) makes things spin
  30. 30.True or false: a diode makes a beeping sound. (a) True (b) False
  31. 31.True or false: a thermistor has coloured bands. (a) False (b) True
  32. 32.🧩 Which component lets current go one way? (a) fuse (b) capacitor (c) diode (d) LDR
  33. 33.True or false: a transistor beeps for an alarm. (a) True (b) False
  34. 34.What does a buzzer do? (a) is a resistance knob (b) makes a beeping sound (c) glows using little power (d) limits the current
  35. 35.True or false: an LDR senses how bright it is. (a) True (b) False
  36. 36.True or false: a resistor boosts a small signal. (a) False (b) True
  37. 37.True or false: an LED glows using little power. (a) False (b) True
  38. 38.What does a fuse do? (a) is a resistance knob (b) stores a little charge (c) blows if current is high (d) lets current go one way
  39. 39.True or false: a transistor boosts a small signal. (a) False (b) True
  40. 40.True or false: a thermistor is a resistance knob. (a) False (b) True

Answer key

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

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