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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 671 · 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) blows if current is high (b) is a resistance knob (c) senses how bright it is (d) makes a beeping sound
  2. 2.What does an LED do? (a) glows using little power (b) smooths a wobbly supply (c) lets current go one way (d) has coloured bands
  3. 3.True or false: a capacitor stores a little charge. (a) True (b) False
  4. 4.🧩 Which component has coloured bands? (a) buzzer (b) diode (c) potentiometer (d) resistor
  5. 5.True or false: a transistor turns a fan or wheels. (a) False (b) True
  6. 6.True or false: a transistor limits the current. (a) True (b) False
  7. 7.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a diode (c) a capacitor (d) a buzzer
  8. 8.🧩 Which component smooths a wobbly supply? (a) LED (b) fuse (c) capacitor (d) potentiometer
  9. 9.🧩 Which component blows if current is high? (a) thermistor (b) fuse (c) resistor (d) buzzer
  10. 10.What does a buzzer do? (a) stores a little charge (b) turns a fan or wheels (c) beeps for an alarm (d) has coloured bands
  11. 11.🧩 Which component senses how hot it is? (a) thermistor (b) LDR (c) potentiometer (d) buzzer
  12. 12.True or false: a potentiometer is a resistance knob. (a) True (b) False
  13. 13.True or false: a potentiometer has coloured bands. (a) True (b) False
  14. 14.What does a resistor do? (a) beeps for an alarm (b) makes things spin (c) has coloured bands (d) senses how hot it is
  15. 15.🧩 Which component lets current go one way? (a) LDR (b) buzzer (c) diode (d) LED
  16. 16.🧩 Which component makes a beeping sound? (a) capacitor (b) diode (c) buzzer (d) resistor
  17. 17.True or false: a thermistor senses how hot it is. (a) True (b) False
  18. 18.What does a thermistor do? (a) beeps for an alarm (b) senses how hot it is (c) blows if current is high (d) senses how bright it is
  19. 19.True or false: a thermistor makes things spin. (a) True (b) False
  20. 20.True or false: a transistor boosts a small signal. (a) True (b) False
  21. 21.True or false: a resistor limits the current. (a) True (b) False
  22. 22.What does a motor do? (a) lets current go one way (b) smooths a wobbly supply (c) turns a fan or wheels (d) limits the current
  23. 23.🧩 Which component limits the current? (a) capacitor (b) LDR (c) motor (d) resistor
  24. 24.🧩 Which component stores a little charge? (a) thermistor (b) LED (c) potentiometer (d) capacitor
  25. 25.What does a motor do? (a) smooths a wobbly supply (b) has coloured bands (c) is a resistance knob (d) makes things spin
  26. 26.True or false: a potentiometer smooths a wobbly supply. (a) True (b) False
  27. 27.True or false: a resistor is a resistance knob. (a) False (b) True
  28. 28.True or false: a transistor blows if current is high. (a) False (b) True
  29. 29.True or false: a buzzer beeps for an alarm. (a) True (b) False
  30. 30.True or false: an LDR makes a beeping sound. (a) False (b) True
  31. 31.True or false: a buzzer makes a beeping sound. (a) False (b) True
  32. 32.What does a capacitor do? (a) makes things spin (b) lets current go one way (c) beeps for an alarm (d) smooths a wobbly supply
  33. 33.🧩 Which component glows using little power? (a) buzzer (b) LED (c) capacitor (d) transistor
  34. 34.🧩 Which component makes things spin? (a) potentiometer (b) capacitor (c) LDR (d) motor
  35. 35.🧩 A capacitor in a circuit can … (a) measure heat (b) spin a wheel (c) make light (d) store charge briefly
  36. 36.What does a potentiometer do? (a) turns a fan or wheels (b) is a resistance knob (c) makes a beeping sound (d) lets current go one way
  37. 37.🧩 Which component turns a fan or wheels? (a) LDR (b) resistor (c) buzzer (d) motor
  38. 38.True or false: a thermistor is a resistance knob. (a) True (b) False
  39. 39.True or false: a capacitor boosts a small signal. (a) True (b) False
  40. 40.🧩 Which component beeps for an alarm? (a) buzzer (b) fuse (c) motor (d) LED

Answer key

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

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