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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 372 · 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 stores a little charge? (a) LDR (b) LED (c) capacitor (d) fuse
  2. 2.🧩 A capacitor in a circuit can … (a) measure heat (b) store charge briefly (c) make light (d) spin a wheel
  3. 3.What does a capacitor do? (a) has coloured bands (b) makes a beeping sound (c) blows if current is high (d) smooths a wobbly supply
  4. 4.🧩 Which component glows using little power? (a) LDR (b) capacitor (c) LED (d) buzzer
  5. 5.🧩 Which component beeps for an alarm? (a) capacitor (b) fuse (c) buzzer (d) LED
  6. 6.What does an LDR do? (a) stores a little charge (b) senses how bright it is (c) makes a beeping sound (d) beeps for an alarm
  7. 7.What does a motor do? (a) has coloured bands (b) turns a fan or wheels (c) stores a little charge (d) smooths a wobbly supply
  8. 8.🧩 Which part changes electrical energy into movement? (a) an LED (b) a motor (c) a fuse (d) a resistor
  9. 9.True or false: a buzzer makes a beeping sound. (a) False (b) True
  10. 10.True or false: an LDR senses how bright it is. (a) False (b) True
  11. 11.🧩 Which component limits the current? (a) LED (b) potentiometer (c) resistor (d) buzzer
  12. 12.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a diode (c) a capacitor (d) a buzzer
  13. 13.True or false: a buzzer smooths a wobbly supply. (a) True (b) False
  14. 14.What does a resistor do? (a) glows using little power (b) blows if current is high (c) limits the current (d) boosts a small signal
  15. 15.🧩 Which component makes things spin? (a) diode (b) motor (c) buzzer (d) resistor
  16. 16.What does a diode do? (a) boosts a small signal (b) makes things spin (c) lets current go one way (d) blows if current is high
  17. 17.True or false: a diode lets current go one way. (a) True (b) False
  18. 18.True or false: a resistor has coloured bands. (a) True (b) False
  19. 19.True or false: a capacitor senses how bright it is. (a) True (b) False
  20. 20.What does a thermistor do? (a) turns a fan or wheels (b) senses how hot it is (c) senses how bright it is (d) limits the current
  21. 21.🧩 Which component senses how hot it is? (a) diode (b) thermistor (c) motor (d) capacitor
  22. 22.True or false: a fuse blows if current is high. (a) False (b) True
  23. 23.What does a fuse do? (a) has coloured bands (b) limits the current (c) blows if current is high (d) turns a fan or wheels
  24. 24.What does a potentiometer do? (a) makes a beeping sound (b) has coloured bands (c) is a resistance knob (d) smooths a wobbly supply
  25. 25.True or false: a motor limits the current. (a) True (b) False
  26. 26.🧩 Which component turns a fan or wheels? (a) buzzer (b) potentiometer (c) motor (d) thermistor
  27. 27.What does a capacitor do? (a) limits the current (b) has coloured bands (c) blows if current is high (d) stores a little charge
  28. 28.What does an LED do? (a) beeps for an alarm (b) is a resistance knob (c) glows using little power (d) boosts a small signal
  29. 29.🧩 Which component is a resistance knob? (a) fuse (b) LDR (c) potentiometer (d) transistor
  30. 30.What does a transistor do? (a) glows using little power (b) blows if current is high (c) beeps for an alarm (d) boosts a small signal
  31. 31.True or false: a potentiometer is a resistance knob. (a) True (b) False
  32. 32.🧩 Which component lets current go one way? (a) potentiometer (b) diode (c) motor (d) fuse
  33. 33.True or false: a diode turns a fan or wheels. (a) True (b) False
  34. 34.True or false: a potentiometer has coloured bands. (a) False (b) True
  35. 35.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
  36. 36.What does a buzzer do? (a) makes a beeping sound (b) has coloured bands (c) senses how bright it is (d) stores a little charge
  37. 37.True or false: an LDR limits the current. (a) True (b) False
  38. 38.True or false: a diode makes a beeping sound. (a) True (b) False
  39. 39.🧩 Which component boosts a small signal? (a) motor (b) capacitor (c) transistor (d) resistor
  40. 40.True or false: a motor makes things spin. (a) False (b) True

Answer key

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

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