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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 673 · 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.🧩 Which part changes electrical energy into sound? (a) a buzzer (b) a resistor (c) a capacitor (d) a diode
  2. 2.🧩 Which component lets current go one way? (a) thermistor (b) diode (c) LED (d) LDR
  3. 3.True or false: a transistor senses how hot it is. (a) False (b) True
  4. 4.🧩 Which part changes electrical energy into movement? (a) an LED (b) a fuse (c) a resistor (d) a motor
  5. 5.True or false: a buzzer makes a beeping sound. (a) False (b) True
  6. 6.🧩 Which component stores a little charge? (a) buzzer (b) motor (c) potentiometer (d) capacitor
  7. 7.What does a diode do? (a) glows using little power (b) senses how hot it is (c) stores a little charge (d) lets current go one way
  8. 8.What does a potentiometer do? (a) turns a fan or wheels (b) blows if current is high (c) makes things spin (d) is a resistance knob
  9. 9.What does a transistor do? (a) limits the current (b) turns a fan or wheels (c) stores a little charge (d) boosts a small signal
  10. 10.True or false: a resistor glows using little power. (a) True (b) False
  11. 11.🧩 Which component beeps for an alarm? (a) LED (b) buzzer (c) diode (d) motor
  12. 12.🧩 A capacitor in a circuit can … (a) spin a wheel (b) store charge briefly (c) make light (d) measure heat
  13. 13.🧩 Which component makes things spin? (a) diode (b) thermistor (c) motor (d) resistor
  14. 14.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
  15. 15.What does a thermistor do? (a) is a resistance knob (b) senses how hot it is (c) stores a little charge (d) senses how bright it is
  16. 16.🧩 Which component glows using little power? (a) motor (b) LED (c) capacitor (d) fuse
  17. 17.🧩 Which component makes a beeping sound? (a) buzzer (b) capacitor (c) LED (d) transistor
  18. 18.What does a fuse do? (a) makes a beeping sound (b) blows if current is high (c) has coloured bands (d) boosts a small signal
  19. 19.🧩 Which component has coloured bands? (a) motor (b) resistor (c) LED (d) diode
  20. 20.True or false: a resistor limits the current. (a) True (b) False
  21. 21.True or false: a capacitor stores a little charge. (a) True (b) False
  22. 22.What does a buzzer do? (a) lets current go one way (b) makes a beeping sound (c) blows if current is high (d) makes things spin
  23. 23.🧩 Which component senses how bright it is? (a) resistor (b) diode (c) LDR (d) capacitor
  24. 24.True or false: a motor makes things spin. (a) True (b) False
  25. 25.🧩 Which component limits the current? (a) motor (b) resistor (c) capacitor (d) potentiometer
  26. 26.What does a capacitor do? (a) is a resistance knob (b) senses how bright it is (c) glows using little power (d) smooths a wobbly supply
  27. 27.True or false: a buzzer senses how hot it is. (a) True (b) False
  28. 28.What does a buzzer do? (a) beeps for an alarm (b) stores a little charge (c) smooths a wobbly supply (d) lets current go one way
  29. 29.True or false: a thermistor has coloured bands. (a) False (b) True
  30. 30.True or false: a capacitor is a resistance knob. (a) False (b) True
  31. 31.True or false: a thermistor senses how hot it is. (a) False (b) True
  32. 32.True or false: an LED stores a little charge. (a) False (b) True
  33. 33.True or false: a transistor boosts a small signal. (a) False (b) True
  34. 34.True or false: an LDR senses how bright it is. (a) True (b) False
  35. 35.🧩 Which component senses how hot it is? (a) capacitor (b) thermistor (c) LDR (d) buzzer
  36. 36.True or false: a potentiometer is a resistance knob. (a) True (b) False
  37. 37.True or false: a thermistor glows using little power. (a) True (b) False
  38. 38.True or false: a fuse is a resistance knob. (a) True (b) False
  39. 39.🧩 Which component blows if current is high? (a) diode (b) buzzer (c) fuse (d) resistor
  40. 40.True or false: a buzzer smooths a wobbly supply. (a) True (b) False

Answer key

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

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