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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 608 · 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 an LDR do? (a) smooths a wobbly supply (b) beeps for an alarm (c) senses how bright it is (d) blows if current is high
  2. 2.What does a fuse do? (a) limits the current (b) blows if current is high (c) makes a beeping sound (d) glows using little power
  3. 3.🧩 Which part changes electrical energy into movement? (a) a fuse (b) an LED (c) a motor (d) a resistor
  4. 4.🧩 Which component smooths a wobbly supply? (a) LED (b) resistor (c) thermistor (d) capacitor
  5. 5.What does an LED do? (a) limits the current (b) glows using little power (c) senses how bright it is (d) senses how hot it is
  6. 6.What does a resistor do? (a) smooths a wobbly supply (b) limits the current (c) senses how hot it is (d) makes a beeping sound
  7. 7.True or false: a thermistor beeps for an alarm. (a) True (b) False
  8. 8.🧩 Which component has coloured bands? (a) transistor (b) buzzer (c) resistor (d) potentiometer
  9. 9.🧩 Which part changes electrical energy into sound? (a) a diode (b) a capacitor (c) a buzzer (d) a resistor
  10. 10.🧩 Which component lets current go one way? (a) capacitor (b) LED (c) motor (d) diode
  11. 11.🧩 A capacitor in a circuit can … (a) make light (b) spin a wheel (c) measure heat (d) store charge briefly
  12. 12.True or false: a fuse blows if current is high. (a) False (b) True
  13. 13.True or false: a motor turns a fan or wheels. (a) True (b) False
  14. 14.🧩 Which component senses how bright it is? (a) resistor (b) LDR (c) capacitor (d) LED
  15. 15.What does a potentiometer do? (a) is a resistance knob (b) boosts a small signal (c) stores a little charge (d) has coloured bands
  16. 16.True or false: a buzzer beeps for an alarm. (a) False (b) True
  17. 17.True or false: an LED glows using little power. (a) True (b) False
  18. 18.True or false: a thermistor makes things spin. (a) True (b) False
  19. 19.What does a resistor do? (a) blows if current is high (b) turns a fan or wheels (c) lets current go one way (d) has coloured bands
  20. 20.🧩 Which component beeps for an alarm? (a) potentiometer (b) buzzer (c) capacitor (d) LDR
  21. 21.What does a diode do? (a) boosts a small signal (b) lets current go one way (c) is a resistance knob (d) senses how hot it is
  22. 22.🧩 Which component boosts a small signal? (a) resistor (b) buzzer (c) LED (d) transistor
  23. 23.True or false: a transistor boosts a small signal. (a) True (b) False
  24. 24.True or false: a capacitor stores a little charge. (a) True (b) False
  25. 25.What does a motor do? (a) lets current go one way (b) turns a fan or wheels (c) smooths a wobbly supply (d) senses how hot it is
  26. 26.True or false: a resistor limits the current. (a) False (b) True
  27. 27.🧩 Which component blows if current is high? (a) capacitor (b) resistor (c) transistor (d) fuse
  28. 28.What does a buzzer do? (a) limits the current (b) makes a beeping sound (c) has coloured bands (d) makes things spin
  29. 29.True or false: an LDR senses how bright it is. (a) True (b) False
  30. 30.True or false: an LED is a resistance knob. (a) False (b) True
  31. 31.True or false: a motor smooths a wobbly supply. (a) True (b) False
  32. 32.True or false: a thermistor senses how hot it is. (a) False (b) True
  33. 33.True or false: a motor makes things spin. (a) False (b) True
  34. 34.What does a buzzer do? (a) senses how hot it is (b) turns a fan or wheels (c) makes things spin (d) beeps for an alarm
  35. 35.True or false: a transistor stores a little charge. (a) True (b) False
  36. 36.True or false: a buzzer has coloured bands. (a) False (b) True
  37. 37.🧩 Which component limits the current? (a) thermistor (b) resistor (c) motor (d) LED
  38. 38.🧩 Which component makes things spin? (a) thermistor (b) motor (c) buzzer (d) resistor
  39. 39.🧩 Which component is a resistance knob? (a) potentiometer (b) transistor (c) diode (d) thermistor
  40. 40.What does a capacitor do? (a) blows if current is high (b) glows using little power (c) is a resistance knob (d) stores a little charge

Answer key

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

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