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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 626 · 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.True or false: a capacitor glows using little power. (a) False (b) True
  2. 2.True or false: a transistor glows using little power. (a) False (b) True
  3. 3.What does an LDR do? (a) stores a little charge (b) smooths a wobbly supply (c) glows using little power (d) senses how bright it is
  4. 4.True or false: a resistor has coloured bands. (a) True (b) False
  5. 5.🧩 Which component beeps for an alarm? (a) capacitor (b) transistor (c) potentiometer (d) buzzer
  6. 6.🧩 Which component makes a beeping sound? (a) fuse (b) motor (c) LDR (d) buzzer
  7. 7.🧩 Which component limits the current? (a) resistor (b) potentiometer (c) capacitor (d) fuse
  8. 8.🧩 Which component smooths a wobbly supply? (a) thermistor (b) LED (c) motor (d) capacitor
  9. 9.What does a transistor do? (a) senses how hot it is (b) limits the current (c) boosts a small signal (d) glows using little power
  10. 10.True or false: an LED glows using little power. (a) False (b) True
  11. 11.🧩 A capacitor in a circuit can … (a) make light (b) measure heat (c) store charge briefly (d) spin a wheel
  12. 12.🧩 Which component glows using little power? (a) LED (b) resistor (c) potentiometer (d) thermistor
  13. 13.True or false: a capacitor lets current go one way. (a) False (b) True
  14. 14.True or false: a buzzer makes a beeping sound. (a) False (b) True
  15. 15.True or false: an LED senses how hot it is. (a) False (b) True
  16. 16.What does a diode do? (a) boosts a small signal (b) turns a fan or wheels (c) lets current go one way (d) has coloured bands
  17. 17.What does a resistor do? (a) has coloured bands (b) beeps for an alarm (c) is a resistance knob (d) stores a little charge
  18. 18.🧩 Which component boosts a small signal? (a) thermistor (b) transistor (c) LDR (d) capacitor
  19. 19.What does a motor do? (a) glows using little power (b) turns a fan or wheels (c) limits the current (d) blows if current is high
  20. 20.True or false: a diode blows if current is high. (a) True (b) False
  21. 21.True or false: an LED blows if current is high. (a) False (b) True
  22. 22.What does a buzzer do? (a) is a resistance knob (b) glows using little power (c) stores a little charge (d) beeps for an alarm
  23. 23.True or false: an LDR senses how bright it is. (a) False (b) True
  24. 24.True or false: an LDR turns a fan or wheels. (a) True (b) False
  25. 25.What does a motor do? (a) beeps for an alarm (b) is a resistance knob (c) makes a beeping sound (d) makes things spin
  26. 26.True or false: a buzzer beeps for an alarm. (a) True (b) False
  27. 27.True or false: a buzzer lets current go one way. (a) True (b) False
  28. 28.True or false: a capacitor stores a little charge. (a) False (b) True
  29. 29.True or false: an LED makes things spin. (a) False (b) True
  30. 30.What does a fuse do? (a) blows if current is high (b) lets current go one way (c) limits the current (d) has coloured bands
  31. 31.What does a thermistor do? (a) senses how hot it is (b) makes a beeping sound (c) turns a fan or wheels (d) senses how bright it is
  32. 32.True or false: a resistor makes a beeping sound. (a) False (b) True
  33. 33.🧩 Which component has coloured bands? (a) fuse (b) resistor (c) LED (d) potentiometer
  34. 34.What does an LED do? (a) glows using little power (b) smooths a wobbly supply (c) senses how hot it is (d) beeps for an alarm
  35. 35.🧩 Which component turns a fan or wheels? (a) resistor (b) motor (c) diode (d) fuse
  36. 36.What does a buzzer do? (a) makes a beeping sound (b) makes things spin (c) turns a fan or wheels (d) has coloured bands
  37. 37.True or false: a motor makes things spin. (a) True (b) False
  38. 38.What does a potentiometer do? (a) beeps for an alarm (b) lets current go one way (c) makes things spin (d) is a resistance knob
  39. 39.🧩 Which component blows if current is high? (a) resistor (b) LDR (c) fuse (d) motor
  40. 40.🧩 Which part changes electrical energy into movement? (a) a fuse (b) a resistor (c) an LED (d) a motor

Answer key

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

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