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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 704 · 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 component senses how hot it is? (a) thermistor (b) diode (c) LDR (d) resistor
  2. 2.True or false: a thermistor makes a beeping sound. (a) False (b) True
  3. 3.What does a potentiometer do? (a) is a resistance knob (b) turns a fan or wheels (c) makes things spin (d) smooths a wobbly supply
  4. 4.🧩 Which component limits the current? (a) resistor (b) diode (c) transistor (d) fuse
  5. 5.🧩 Which component smooths a wobbly supply? (a) LDR (b) buzzer (c) capacitor (d) LED
  6. 6.What does a fuse do? (a) boosts a small signal (b) blows if current is high (c) glows using little power (d) beeps for an alarm
  7. 7.True or false: a potentiometer is a resistance knob. (a) False (b) True
  8. 8.🧩 Which component senses how bright it is? (a) fuse (b) capacitor (c) diode (d) LDR
  9. 9.🧩 Which component makes a beeping sound? (a) buzzer (b) thermistor (c) transistor (d) LED
  10. 10.🧩 Which component beeps for an alarm? (a) LDR (b) thermistor (c) buzzer (d) resistor
  11. 11.🧩 Which component stores a little charge? (a) capacitor (b) resistor (c) fuse (d) LED
  12. 12.🧩 Which component makes things spin? (a) capacitor (b) resistor (c) motor (d) fuse
  13. 13.🧩 Which component glows using little power? (a) motor (b) LDR (c) LED (d) resistor
  14. 14.🧩 Which part changes electrical energy into movement? (a) a resistor (b) an LED (c) a motor (d) a fuse
  15. 15.True or false: a capacitor stores a little charge. (a) False (b) True
  16. 16.True or false: a transistor glows using little power. (a) True (b) False
  17. 17.True or false: a resistor limits the current. (a) False (b) True
  18. 18.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a diode (c) a buzzer (d) a resistor
  19. 19.True or false: a capacitor limits the current. (a) True (b) False
  20. 20.What does a transistor do? (a) has coloured bands (b) boosts a small signal (c) is a resistance knob (d) stores a little charge
  21. 21.True or false: a motor blows if current is high. (a) True (b) False
  22. 22.🧩 Which component is a resistance knob? (a) diode (b) thermistor (c) transistor (d) potentiometer
  23. 23.True or false: a motor turns a fan or wheels. (a) True (b) False
  24. 24.🧩 A capacitor in a circuit can … (a) make light (b) measure heat (c) spin a wheel (d) store charge briefly
  25. 25.What does a buzzer do? (a) boosts a small signal (b) makes a beeping sound (c) turns a fan or wheels (d) senses how bright it is
  26. 26.True or false: a fuse is a resistance knob. (a) False (b) True
  27. 27.True or false: a fuse turns a fan or wheels. (a) False (b) True
  28. 28.🧩 Which component has coloured bands? (a) fuse (b) resistor (c) thermistor (d) diode
  29. 29.What does a motor do? (a) has coloured bands (b) lets current go one way (c) makes things spin (d) stores a little charge
  30. 30.True or false: a motor lets current go one way. (a) True (b) False
  31. 31.What does a capacitor do? (a) stores a little charge (b) boosts a small signal (c) turns a fan or wheels (d) limits the current
  32. 32.What does a diode do? (a) makes things spin (b) beeps for an alarm (c) lets current go one way (d) senses how bright it is
  33. 33.True or false: a transistor makes a beeping sound. (a) False (b) True
  34. 34.True or false: a diode has coloured bands. (a) False (b) True
  35. 35.What does an LDR do? (a) blows if current is high (b) senses how bright it is (c) smooths a wobbly supply (d) stores a little charge
  36. 36.True or false: a fuse senses how bright it is. (a) True (b) False
  37. 37.🧩 Which component turns a fan or wheels? (a) thermistor (b) motor (c) diode (d) buzzer
  38. 38.What does a motor do? (a) glows using little power (b) turns a fan or wheels (c) smooths a wobbly supply (d) stores a little charge
  39. 39.🧩 Which component blows if current is high? (a) fuse (b) potentiometer (c) motor (d) LED
  40. 40.What does a resistor do? (a) senses how hot it is (b) beeps for an alarm (c) limits the current (d) lets current go one way

Answer key

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

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