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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 603 · 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.What does a transistor do? (a) blows if current is high (b) boosts a small signal (c) makes a beeping sound (d) stores a little charge
  2. 2.🧩 Which component stores a little charge? (a) transistor (b) LED (c) fuse (d) capacitor
  3. 3.🧩 A capacitor in a circuit can … (a) store charge briefly (b) measure heat (c) spin a wheel (d) make light
  4. 4.🧩 Which part changes electrical energy into movement? (a) a fuse (b) a motor (c) a resistor (d) an LED
  5. 5.What does a buzzer do? (a) limits the current (b) beeps for an alarm (c) lets current go one way (d) has coloured bands
  6. 6.What does a diode do? (a) stores a little charge (b) lets current go one way (c) blows if current is high (d) turns a fan or wheels
  7. 7.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a capacitor (c) a diode (d) a buzzer
  8. 8.What does a resistor do? (a) smooths a wobbly supply (b) makes things spin (c) lets current go one way (d) has coloured bands
  9. 9.🧩 Which component limits the current? (a) thermistor (b) potentiometer (c) resistor (d) fuse
  10. 10.True or false: a buzzer makes a beeping sound. (a) True (b) False
  11. 11.What does a potentiometer do? (a) boosts a small signal (b) makes things spin (c) smooths a wobbly supply (d) is a resistance knob
  12. 12.True or false: a fuse blows if current is high. (a) False (b) True
  13. 13.What does an LDR do? (a) senses how bright it is (b) makes a beeping sound (c) boosts a small signal (d) glows using little power
  14. 14.True or false: an LDR senses how bright it is. (a) False (b) True
  15. 15.🧩 Which component smooths a wobbly supply? (a) capacitor (b) resistor (c) potentiometer (d) LED
  16. 16.True or false: a thermistor senses how hot it is. (a) True (b) False
  17. 17.🧩 Which component blows if current is high? (a) thermistor (b) LDR (c) fuse (d) diode
  18. 18.🧩 Which component glows using little power? (a) diode (b) motor (c) LED (d) buzzer
  19. 19.🧩 Which component has coloured bands? (a) resistor (b) capacitor (c) LDR (d) potentiometer
  20. 20.🧩 Which component boosts a small signal? (a) transistor (b) resistor (c) thermistor (d) motor
  21. 21.True or false: a capacitor is a resistance knob. (a) False (b) True
  22. 22.True or false: a thermistor limits the current. (a) False (b) True
  23. 23.What does a motor do? (a) is a resistance knob (b) lets current go one way (c) stores a little charge (d) makes things spin
  24. 24.🧩 Which component turns a fan or wheels? (a) motor (b) transistor (c) potentiometer (d) diode
  25. 25.True or false: a resistor has coloured bands. (a) False (b) True
  26. 26.🧩 Which component is a resistance knob? (a) thermistor (b) buzzer (c) LDR (d) potentiometer
  27. 27.What does a capacitor do? (a) boosts a small signal (b) senses how bright it is (c) smooths a wobbly supply (d) makes a beeping sound
  28. 28.🧩 Which component makes a beeping sound? (a) buzzer (b) fuse (c) motor (d) thermistor
  29. 29.What does a capacitor do? (a) stores a little charge (b) senses how hot it is (c) boosts a small signal (d) turns a fan or wheels
  30. 30.What does a fuse do? (a) blows if current is high (b) makes things spin (c) limits the current (d) senses how hot it is
  31. 31.True or false: an LDR makes things spin. (a) True (b) False
  32. 32.True or false: a buzzer limits the current. (a) True (b) False
  33. 33.What does a buzzer do? (a) senses how bright it is (b) has coloured bands (c) makes a beeping sound (d) glows using little power
  34. 34.True or false: a capacitor stores a little charge. (a) True (b) False
  35. 35.🧩 Which component senses how hot it is? (a) capacitor (b) thermistor (c) LDR (d) motor
  36. 36.🧩 Which component makes things spin? (a) motor (b) buzzer (c) thermistor (d) resistor
  37. 37.True or false: a capacitor boosts a small signal. (a) True (b) False
  38. 38.🧩 A capacitor in a circuit can … (a) spin a wheel (b) store charge briefly (c) measure heat (d) make light
  39. 39.True or false: a potentiometer is a resistance knob. (a) True (b) False
  40. 40.🧩 Which component senses how bright it is? (a) LDR (b) thermistor (c) diode (d) transistor

Answer key

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

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