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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 93 · 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.🧩 A capacitor in a circuit can … (a) measure heat (b) make light (c) store charge briefly (d) spin a wheel
  2. 2.What does a diode do? (a) senses how bright it is (b) lets current go one way (c) glows using little power (d) senses how hot it is
  3. 3.🧩 Which part changes electrical energy into sound? (a) a diode (b) a resistor (c) a buzzer (d) a capacitor
  4. 4.What does a potentiometer do? (a) turns a fan or wheels (b) is a resistance knob (c) senses how hot it is (d) boosts a small signal
  5. 5.True or false: a motor makes things spin. (a) True (b) False
  6. 6.🧩 Which component limits the current? (a) diode (b) buzzer (c) transistor (d) resistor
  7. 7.🧩 Which component has coloured bands? (a) fuse (b) capacitor (c) LDR (d) resistor
  8. 8.True or false: a capacitor stores a little charge. (a) True (b) False
  9. 9.True or false: a potentiometer is a resistance knob. (a) False (b) True
  10. 10.🧩 Which component blows if current is high? (a) transistor (b) fuse (c) thermistor (d) potentiometer
  11. 11.🧩 Which part changes electrical energy into movement? (a) a motor (b) a resistor (c) an LED (d) a fuse
  12. 12.🧩 Which component boosts a small signal? (a) transistor (b) diode (c) fuse (d) potentiometer
  13. 13.True or false: a fuse has coloured bands. (a) False (b) True
  14. 14.🧩 Which component turns a fan or wheels? (a) motor (b) fuse (c) potentiometer (d) LDR
  15. 15.🧩 Which component glows using little power? (a) LED (b) resistor (c) motor (d) LDR
  16. 16.True or false: a buzzer smooths a wobbly supply. (a) False (b) True
  17. 17.What does a capacitor do? (a) makes a beeping sound (b) has coloured bands (c) stores a little charge (d) is a resistance knob
  18. 18.🧩 Which component senses how bright it is? (a) potentiometer (b) buzzer (c) LED (d) LDR
  19. 19.True or false: a thermistor senses how hot it is. (a) True (b) False
  20. 20.True or false: a thermistor has coloured bands. (a) True (b) False
  21. 21.True or false: a capacitor has coloured bands. (a) True (b) False
  22. 22.What does an LED do? (a) smooths a wobbly supply (b) glows using little power (c) makes a beeping sound (d) stores a little charge
  23. 23.🧩 Which component is a resistance knob? (a) potentiometer (b) transistor (c) resistor (d) capacitor
  24. 24.What does a buzzer do? (a) smooths a wobbly supply (b) makes a beeping sound (c) makes things spin (d) has coloured bands
  25. 25.What does an LDR do? (a) senses how bright it is (b) is a resistance knob (c) stores a little charge (d) makes things spin
  26. 26.True or false: a buzzer makes things spin. (a) True (b) False
  27. 27.🧩 Which component stores a little charge? (a) diode (b) capacitor (c) motor (d) resistor
  28. 28.True or false: a buzzer beeps for an alarm. (a) False (b) True
  29. 29.True or false: a transistor boosts a small signal. (a) False (b) True
  30. 30.🧩 Which component beeps for an alarm? (a) buzzer (b) potentiometer (c) fuse (d) LED
  31. 31.What does a fuse do? (a) blows if current is high (b) limits the current (c) makes things spin (d) stores a little charge
  32. 32.🧩 Which component senses how hot it is? (a) transistor (b) thermistor (c) capacitor (d) buzzer
  33. 33.True or false: a potentiometer senses how bright it is. (a) False (b) True
  34. 34.True or false: a thermistor beeps for an alarm. (a) True (b) False
  35. 35.True or false: a diode lets current go one way. (a) False (b) True
  36. 36.True or false: an LDR turns a fan or wheels. (a) True (b) False
  37. 37.What does a motor do? (a) smooths a wobbly supply (b) beeps for an alarm (c) makes things spin (d) limits the current
  38. 38.What does a transistor do? (a) lets current go one way (b) limits the current (c) smooths a wobbly supply (d) boosts a small signal
  39. 39.What does a resistor do? (a) boosts a small signal (b) has coloured bands (c) makes things spin (d) is a resistance knob
  40. 40.True or false: an LDR senses how bright it is. (a) True (b) False

Answer key

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

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