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Electronics Worksheet: Electronic Components

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

Answer key

  1. LDR
  2. senses how hot it is
  3. store charge briefly
  4. thermistor
  5. resistor
  6. LED
  7. makes things spin
  8. smooths a wobbly supply
  9. a motor
  10. True
  11. buzzer
  12. glows using little power
  13. fuse
  14. limits the current
  15. True
  16. a buzzer
  17. False
  18. False
  19. motor
  20. makes a beeping sound
  21. True
  22. transistor
  23. capacitor
  24. False
  25. False
  26. True
  27. diode
  28. motor
  29. True
  30. store charge briefly
  31. blows if current is high
  32. lets current go one way
  33. capacitor
  34. is a resistance knob
  35. resistor
  36. True
  37. stores a little charge
  38. True
  39. False
  40. True

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