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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 104 · 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 capacitor do? (a) is a resistance knob (b) senses how hot it is (c) makes a beeping sound (d) smooths a wobbly supply
  2. 2.True or false: a buzzer makes a beeping sound. (a) True (b) False
  3. 3.What does a capacitor do? (a) senses how bright it is (b) stores a little charge (c) has coloured bands (d) beeps for an alarm
  4. 4.🧩 Which part changes electrical energy into movement? (a) a fuse (b) an LED (c) a resistor (d) a motor
  5. 5.True or false: a motor senses how hot it is. (a) True (b) False
  6. 6.🧩 A capacitor in a circuit can … (a) store charge briefly (b) measure heat (c) make light (d) spin a wheel
  7. 7.🧩 Which component glows using little power? (a) LDR (b) motor (c) LED (d) buzzer
  8. 8.🧩 Which part changes electrical energy into sound? (a) a diode (b) a resistor (c) a buzzer (d) a capacitor
  9. 9.What does a thermistor do? (a) beeps for an alarm (b) blows if current is high (c) senses how hot it is (d) makes things spin
  10. 10.🧩 Which component blows if current is high? (a) fuse (b) capacitor (c) thermistor (d) motor
  11. 11.🧩 Which component makes things spin? (a) motor (b) capacitor (c) potentiometer (d) resistor
  12. 12.What does an LED do? (a) beeps for an alarm (b) senses how hot it is (c) glows using little power (d) stores a little charge
  13. 13.What does a fuse do? (a) makes things spin (b) boosts a small signal (c) has coloured bands (d) blows if current is high
  14. 14.🧩 Which component beeps for an alarm? (a) capacitor (b) motor (c) resistor (d) buzzer
  15. 15.True or false: a capacitor stores a little charge. (a) False (b) True
  16. 16.🧩 Which component is a resistance knob? (a) potentiometer (b) capacitor (c) LDR (d) motor
  17. 17.🧩 Which component lets current go one way? (a) buzzer (b) thermistor (c) fuse (d) diode
  18. 18.What does an LDR do? (a) makes things spin (b) boosts a small signal (c) lets current go one way (d) senses how bright it is
  19. 19.True or false: a buzzer is a resistance knob. (a) True (b) False
  20. 20.🧩 Which component limits the current? (a) buzzer (b) LED (c) fuse (d) resistor
  21. 21.What does a potentiometer do? (a) boosts a small signal (b) glows using little power (c) is a resistance knob (d) senses how bright it is
  22. 22.What does a transistor do? (a) smooths a wobbly supply (b) makes things spin (c) glows using little power (d) boosts a small signal
  23. 23.🧩 Which component stores a little charge? (a) capacitor (b) diode (c) motor (d) LED
  24. 24.What does a resistor do? (a) makes things spin (b) turns a fan or wheels (c) boosts a small signal (d) has coloured bands
  25. 25.What does a diode do? (a) senses how hot it is (b) makes things spin (c) lets current go one way (d) is a resistance knob
  26. 26.🧩 Which component has coloured bands? (a) transistor (b) resistor (c) diode (d) LDR
  27. 27.True or false: a resistor limits the current. (a) False (b) True
  28. 28.True or false: an LDR senses how bright it is. (a) False (b) True
  29. 29.True or false: a resistor has coloured bands. (a) False (b) True
  30. 30.What does a buzzer do? (a) boosts a small signal (b) beeps for an alarm (c) glows using little power (d) has coloured bands
  31. 31.True or false: a fuse boosts a small signal. (a) True (b) False
  32. 32.True or false: a diode lets current go one way. (a) True (b) False
  33. 33.What does a resistor do? (a) beeps for an alarm (b) senses how hot it is (c) limits the current (d) makes things spin
  34. 34.True or false: an LED glows using little power. (a) False (b) True
  35. 35.🧩 Which component makes a beeping sound? (a) buzzer (b) LED (c) potentiometer (d) resistor
  36. 36.True or false: a capacitor has coloured bands. (a) True (b) False
  37. 37.True or false: a fuse has coloured bands. (a) False (b) True
  38. 38.True or false: a buzzer boosts a small signal. (a) False (b) True
  39. 39.What does a buzzer do? (a) turns a fan or wheels (b) senses how hot it is (c) makes a beeping sound (d) senses how bright it is
  40. 40.True or false: a thermistor limits the current. (a) True (b) False

Answer key

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

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