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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 343 · 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 limits the current? (a) resistor (b) thermistor (c) LED (d) LDR
  2. 2.🧩 Which component stores a little charge? (a) LDR (b) transistor (c) buzzer (d) capacitor
  3. 3.What does a buzzer do? (a) is a resistance knob (b) beeps for an alarm (c) limits the current (d) has coloured bands
  4. 4.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a buzzer (c) a resistor (d) a diode
  5. 5.🧩 Which component turns a fan or wheels? (a) diode (b) buzzer (c) motor (d) potentiometer
  6. 6.🧩 A capacitor in a circuit can … (a) make light (b) spin a wheel (c) store charge briefly (d) measure heat
  7. 7.🧩 Which part changes electrical energy into movement? (a) a resistor (b) an LED (c) a motor (d) a fuse
  8. 8.🧩 Which component senses how hot it is? (a) transistor (b) thermistor (c) resistor (d) LED
  9. 9.🧩 Which component has coloured bands? (a) capacitor (b) transistor (c) resistor (d) motor
  10. 10.What does a thermistor do? (a) senses how hot it is (b) has coloured bands (c) makes a beeping sound (d) limits the current
  11. 11.True or false: a resistor has coloured bands. (a) False (b) True
  12. 12.🧩 Which component is a resistance knob? (a) potentiometer (b) transistor (c) resistor (d) LED
  13. 13.What does a potentiometer do? (a) beeps for an alarm (b) is a resistance knob (c) senses how hot it is (d) smooths a wobbly supply
  14. 14.What does a transistor do? (a) stores a little charge (b) makes a beeping sound (c) beeps for an alarm (d) boosts a small signal
  15. 15.True or false: a capacitor glows using little power. (a) True (b) False
  16. 16.True or false: an LED glows using little power. (a) True (b) False
  17. 17.What does an LED do? (a) makes things spin (b) turns a fan or wheels (c) glows using little power (d) is a resistance knob
  18. 18.True or false: a fuse beeps for an alarm. (a) True (b) False
  19. 19.🧩 Which component makes things spin? (a) motor (b) potentiometer (c) LDR (d) buzzer
  20. 20.What does a fuse do? (a) stores a little charge (b) turns a fan or wheels (c) blows if current is high (d) has coloured bands
  21. 21.🧩 Which component makes a beeping sound? (a) resistor (b) potentiometer (c) buzzer (d) motor
  22. 22.True or false: a buzzer makes a beeping sound. (a) True (b) False
  23. 23.What does a diode do? (a) limits the current (b) lets current go one way (c) glows using little power (d) turns a fan or wheels
  24. 24.True or false: a transistor glows using little power. (a) False (b) True
  25. 25.True or false: a capacitor blows if current is high. (a) True (b) False
  26. 26.True or false: a thermistor stores a little charge. (a) False (b) True
  27. 27.True or false: a diode stores a little charge. (a) True (b) False
  28. 28.What does a capacitor do? (a) makes things spin (b) turns a fan or wheels (c) has coloured bands (d) smooths a wobbly supply
  29. 29.True or false: a diode lets current go one way. (a) False (b) True
  30. 30.🧩 Which component boosts a small signal? (a) transistor (b) thermistor (c) LDR (d) diode
  31. 31.True or false: a potentiometer lets current go one way. (a) True (b) False
  32. 32.True or false: a transistor boosts a small signal. (a) True (b) False
  33. 33.True or false: a thermistor has coloured bands. (a) True (b) False
  34. 34.True or false: an LDR senses how bright it is. (a) True (b) False
  35. 35.True or false: a diode senses how bright it is. (a) False (b) True
  36. 36.True or false: a diode makes a beeping sound. (a) True (b) False
  37. 37.True or false: a capacitor stores a little charge. (a) True (b) False
  38. 38.What does a resistor do? (a) senses how hot it is (b) has coloured bands (c) makes things spin (d) senses how bright it is
  39. 39.🧩 Which component smooths a wobbly supply? (a) capacitor (b) fuse (c) buzzer (d) transistor
  40. 40.🧩 Which component senses how bright it is? (a) LED (b) motor (c) resistor (d) LDR

Answer key

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

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