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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 648 · 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) makes a beeping sound (b) stores a little charge (c) turns a fan or wheels (d) is a resistance knob
  2. 2.🧩 Which component is a resistance knob? (a) resistor (b) LED (c) thermistor (d) potentiometer
  3. 3.True or false: a thermistor blows if current is high. (a) False (b) True
  4. 4.🧩 Which component smooths a wobbly supply? (a) diode (b) capacitor (c) thermistor (d) buzzer
  5. 5.True or false: a buzzer senses how bright it is. (a) False (b) True
  6. 6.True or false: a potentiometer is a resistance knob. (a) True (b) False
  7. 7.True or false: a motor turns a fan or wheels. (a) False (b) True
  8. 8.What does an LED do? (a) has coloured bands (b) beeps for an alarm (c) glows using little power (d) lets current go one way
  9. 9.🧩 Which part changes electrical energy into sound? (a) a buzzer (b) a capacitor (c) a resistor (d) a diode
  10. 10.True or false: a fuse blows if current is high. (a) False (b) True
  11. 11.🧩 Which component makes a beeping sound? (a) buzzer (b) LDR (c) thermistor (d) motor
  12. 12.True or false: a transistor senses how hot it is. (a) True (b) False
  13. 13.🧩 Which component beeps for an alarm? (a) potentiometer (b) diode (c) LDR (d) buzzer
  14. 14.🧩 Which component lets current go one way? (a) potentiometer (b) thermistor (c) resistor (d) diode
  15. 15.True or false: a transistor boosts a small signal. (a) True (b) False
  16. 16.🧩 A capacitor in a circuit can … (a) make light (b) store charge briefly (c) spin a wheel (d) measure heat
  17. 17.What does a thermistor do? (a) has coloured bands (b) is a resistance knob (c) senses how hot it is (d) glows using little power
  18. 18.True or false: a resistor limits the current. (a) False (b) True
  19. 19.True or false: an LED glows using little power. (a) False (b) True
  20. 20.🧩 Which component senses how hot it is? (a) thermistor (b) transistor (c) LDR (d) buzzer
  21. 21.🧩 Which part changes electrical energy into movement? (a) a motor (b) a fuse (c) a resistor (d) an LED
  22. 22.True or false: a fuse is a resistance knob. (a) True (b) False
  23. 23.True or false: a diode glows using little power. (a) True (b) False
  24. 24.What does a potentiometer do? (a) lets current go one way (b) is a resistance knob (c) stores a little charge (d) smooths a wobbly supply
  25. 25.True or false: a capacitor stores a little charge. (a) True (b) False
  26. 26.What does a fuse do? (a) boosts a small signal (b) smooths a wobbly supply (c) blows if current is high (d) stores a little charge
  27. 27.🧩 Which component blows if current is high? (a) buzzer (b) fuse (c) LDR (d) LED
  28. 28.True or false: a thermistor senses how hot it is. (a) False (b) True
  29. 29.🧩 Which component stores a little charge? (a) motor (b) potentiometer (c) capacitor (d) LDR
  30. 30.🧩 Which component boosts a small signal? (a) motor (b) fuse (c) diode (d) transistor
  31. 31.True or false: a motor makes a beeping sound. (a) True (b) False
  32. 32.🧩 Which component glows using little power? (a) LED (b) LDR (c) buzzer (d) transistor
  33. 33.What does a buzzer do? (a) beeps for an alarm (b) has coloured bands (c) smooths a wobbly supply (d) blows if current is high
  34. 34.True or false: a capacitor turns a fan or wheels. (a) True (b) False
  35. 35.🧩 Which component makes things spin? (a) motor (b) capacitor (c) LDR (d) LED
  36. 36.True or false: a diode lets current go one way. (a) True (b) False
  37. 37.What does a capacitor do? (a) is a resistance knob (b) makes things spin (c) glows using little power (d) stores a little charge
  38. 38.True or false: a thermistor lets current go one way. (a) False (b) True
  39. 39.True or false: a resistor has coloured bands. (a) True (b) False
  40. 40.🧩 Which component limits the current? (a) thermistor (b) buzzer (c) fuse (d) resistor

Answer key

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

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