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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 515 · 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) thermistor (b) LED (c) resistor (d) fuse
  2. 2.🧩 Which component smooths a wobbly supply? (a) capacitor (b) fuse (c) buzzer (d) diode
  3. 3.True or false: a capacitor has coloured bands. (a) True (b) False
  4. 4.What does an LED do? (a) glows using little power (b) limits the current (c) lets current go one way (d) is a resistance knob
  5. 5.True or false: a capacitor smooths a wobbly supply. (a) True (b) False
  6. 6.🧩 Which component turns a fan or wheels? (a) LDR (b) resistor (c) diode (d) motor
  7. 7.🧩 Which part changes electrical energy into sound? (a) a diode (b) a buzzer (c) a capacitor (d) a resistor
  8. 8.🧩 Which part changes electrical energy into movement? (a) a motor (b) a resistor (c) a fuse (d) an LED
  9. 9.🧩 Which component stores a little charge? (a) LDR (b) resistor (c) capacitor (d) diode
  10. 10.True or false: a fuse senses how bright it is. (a) False (b) True
  11. 11.🧩 Which component glows using little power? (a) transistor (b) buzzer (c) LED (d) potentiometer
  12. 12.🧩 Which component makes things spin? (a) motor (b) capacitor (c) buzzer (d) LED
  13. 13.What does a motor do? (a) makes a beeping sound (b) blows if current is high (c) stores a little charge (d) makes things spin
  14. 14.What does a resistor do? (a) has coloured bands (b) blows if current is high (c) is a resistance knob (d) lets current go one way
  15. 15.True or false: a fuse blows if current is high. (a) False (b) True
  16. 16.🧩 Which component senses how hot it is? (a) buzzer (b) transistor (c) thermistor (d) LDR
  17. 17.True or false: a fuse makes things spin. (a) False (b) True
  18. 18.🧩 A capacitor in a circuit can … (a) measure heat (b) spin a wheel (c) store charge briefly (d) make light
  19. 19.True or false: a motor makes things spin. (a) True (b) False
  20. 20.True or false: a capacitor blows if current is high. (a) True (b) False
  21. 21.What does a diode do? (a) smooths a wobbly supply (b) turns a fan or wheels (c) has coloured bands (d) lets current go one way
  22. 22.🧩 Which component lets current go one way? (a) diode (b) transistor (c) motor (d) capacitor
  23. 23.What does a transistor do? (a) turns a fan or wheels (b) boosts a small signal (c) is a resistance knob (d) makes things spin
  24. 24.True or false: a thermistor boosts a small signal. (a) True (b) False
  25. 25.True or false: a capacitor boosts a small signal. (a) False (b) True
  26. 26.True or false: an LDR limits the current. (a) False (b) True
  27. 27.True or false: a motor senses how bright it is. (a) True (b) False
  28. 28.True or false: a buzzer makes a beeping sound. (a) True (b) False
  29. 29.What does a thermistor do? (a) senses how hot it is (b) boosts a small signal (c) has coloured bands (d) beeps for an alarm
  30. 30.🧩 Which component makes a beeping sound? (a) resistor (b) capacitor (c) LDR (d) buzzer
  31. 31.True or false: an LDR senses how bright it is. (a) False (b) True
  32. 32.True or false: a resistor limits the current. (a) True (b) False
  33. 33.What does a resistor do? (a) glows using little power (b) makes a beeping sound (c) limits the current (d) smooths a wobbly supply
  34. 34.True or false: a capacitor stores a little charge. (a) True (b) False
  35. 35.🧩 Which component senses how bright it is? (a) buzzer (b) fuse (c) LED (d) LDR
  36. 36.What does a potentiometer do? (a) senses how hot it is (b) is a resistance knob (c) glows using little power (d) makes things spin
  37. 37.🧩 Which component blows if current is high? (a) potentiometer (b) fuse (c) LED (d) buzzer
  38. 38.True or false: a transistor senses how bright it is. (a) True (b) False
  39. 39.What does a buzzer do? (a) stores a little charge (b) beeps for an alarm (c) senses how bright it is (d) is a resistance knob
  40. 40.🧩 Which component has coloured bands? (a) diode (b) capacitor (c) LED (d) resistor

Answer key

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

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