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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 279 · 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 transistor do? (a) boosts a small signal (b) has coloured bands (c) smooths a wobbly supply (d) senses how bright it is
  2. 2.🧩 Which component turns a fan or wheels? (a) buzzer (b) resistor (c) motor (d) capacitor
  3. 3.True or false: a buzzer turns a fan or wheels. (a) False (b) True
  4. 4.What does a potentiometer do? (a) lets current go one way (b) is a resistance knob (c) blows if current is high (d) glows using little power
  5. 5.🧩 Which component lets current go one way? (a) fuse (b) thermistor (c) resistor (d) diode
  6. 6.🧩 A capacitor in a circuit can … (a) store charge briefly (b) make light (c) spin a wheel (d) measure heat
  7. 7.🧩 Which part changes electrical energy into sound? (a) a buzzer (b) a resistor (c) a diode (d) a capacitor
  8. 8.🧩 Which component senses how hot it is? (a) transistor (b) motor (c) buzzer (d) thermistor
  9. 9.🧩 Which component blows if current is high? (a) diode (b) potentiometer (c) LED (d) fuse
  10. 10.What does a motor do? (a) smooths a wobbly supply (b) stores a little charge (c) has coloured bands (d) makes things spin
  11. 11.True or false: an LDR makes a beeping sound. (a) True (b) False
  12. 12.What does an LED do? (a) glows using little power (b) limits the current (c) makes things spin (d) blows if current is high
  13. 13.🧩 Which component has coloured bands? (a) motor (b) LED (c) resistor (d) diode
  14. 14.True or false: a motor turns a fan or wheels. (a) False (b) True
  15. 15.What does an LDR do? (a) senses how hot it is (b) lets current go one way (c) blows if current is high (d) senses how bright it is
  16. 16.True or false: a capacitor boosts a small signal. (a) False (b) True
  17. 17.🧩 Which component stores a little charge? (a) capacitor (b) buzzer (c) LED (d) resistor
  18. 18.🧩 Which component is a resistance knob? (a) buzzer (b) LED (c) diode (d) potentiometer
  19. 19.🧩 Which part changes electrical energy into movement? (a) a resistor (b) an LED (c) a fuse (d) a motor
  20. 20.🧩 Which component smooths a wobbly supply? (a) resistor (b) diode (c) LED (d) capacitor
  21. 21.🧩 Which component makes things spin? (a) potentiometer (b) resistor (c) LED (d) motor
  22. 22.True or false: a transistor makes things spin. (a) True (b) False
  23. 23.What does a resistor do? (a) boosts a small signal (b) beeps for an alarm (c) has coloured bands (d) glows using little power
  24. 24.🧩 Which component beeps for an alarm? (a) LED (b) capacitor (c) buzzer (d) motor
  25. 25.🧩 Which component senses how bright it is? (a) LED (b) LDR (c) fuse (d) thermistor
  26. 26.True or false: a diode glows using little power. (a) False (b) True
  27. 27.True or false: a diode has coloured bands. (a) True (b) False
  28. 28.🧩 Which component glows using little power? (a) motor (b) buzzer (c) LDR (d) LED
  29. 29.True or false: a fuse makes things spin. (a) False (b) True
  30. 30.What does a thermistor do? (a) senses how hot it is (b) is a resistance knob (c) blows if current is high (d) smooths a wobbly supply
  31. 31.🧩 Which component limits the current? (a) thermistor (b) buzzer (c) resistor (d) capacitor
  32. 32.True or false: a thermistor senses how hot it is. (a) True (b) False
  33. 33.True or false: a fuse blows if current is high. (a) False (b) True
  34. 34.True or false: a thermistor lets current go one way. (a) True (b) False
  35. 35.True or false: a resistor stores a little charge. (a) False (b) True
  36. 36.🧩 Which component makes a beeping sound? (a) thermistor (b) LED (c) buzzer (d) diode
  37. 37.True or false: a buzzer beeps for an alarm. (a) True (b) False
  38. 38.🧩 Which component boosts a small signal? (a) buzzer (b) capacitor (c) motor (d) transistor
  39. 39.What does a motor do? (a) boosts a small signal (b) has coloured bands (c) turns a fan or wheels (d) blows if current is high
  40. 40.True or false: an LED has coloured bands. (a) True (b) False

Answer key

  1. boosts a small signal
  2. motor
  3. False
  4. is a resistance knob
  5. diode
  6. store charge briefly
  7. a buzzer
  8. thermistor
  9. fuse
  10. makes things spin
  11. False
  12. glows using little power
  13. resistor
  14. True
  15. senses how bright it is
  16. False
  17. capacitor
  18. potentiometer
  19. a motor
  20. capacitor
  21. motor
  22. False
  23. has coloured bands
  24. buzzer
  25. LDR
  26. False
  27. False
  28. LED
  29. False
  30. senses how hot it is
  31. resistor
  32. True
  33. True
  34. False
  35. False
  36. buzzer
  37. True
  38. transistor
  39. turns a fan or wheels
  40. False

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