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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 703 · 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 resistor do? (a) turns a fan or wheels (b) boosts a small signal (c) is a resistance knob (d) has coloured bands
  2. 2.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a buzzer (c) a capacitor (d) a diode
  3. 3.True or false: a buzzer senses how hot it is. (a) False (b) True
  4. 4.🧩 Which component glows using little power? (a) LED (b) diode (c) thermistor (d) resistor
  5. 5.True or false: a motor makes things spin. (a) False (b) True
  6. 6.What does an LED do? (a) stores a little charge (b) glows using little power (c) senses how hot it is (d) smooths a wobbly supply
  7. 7.🧩 Which component beeps for an alarm? (a) resistor (b) buzzer (c) capacitor (d) transistor
  8. 8.🧩 Which component lets current go one way? (a) thermistor (b) LDR (c) fuse (d) diode
  9. 9.What does a buzzer do? (a) smooths a wobbly supply (b) senses how hot it is (c) blows if current is high (d) beeps for an alarm
  10. 10.What does a capacitor do? (a) beeps for an alarm (b) blows if current is high (c) smooths a wobbly supply (d) is a resistance knob
  11. 11.🧩 A capacitor in a circuit can … (a) make light (b) measure heat (c) spin a wheel (d) store charge briefly
  12. 12.What does a diode do? (a) limits the current (b) has coloured bands (c) lets current go one way (d) senses how bright it is
  13. 13.🧩 Which component limits the current? (a) diode (b) transistor (c) buzzer (d) resistor
  14. 14.🧩 Which component makes a beeping sound? (a) fuse (b) buzzer (c) LED (d) transistor
  15. 15.True or false: a diode lets current go one way. (a) False (b) True
  16. 16.What does a transistor do? (a) boosts a small signal (b) makes a beeping sound (c) is a resistance knob (d) beeps for an alarm
  17. 17.🧩 Which part changes electrical energy into movement? (a) an LED (b) a motor (c) a resistor (d) a fuse
  18. 18.🧩 Which component smooths a wobbly supply? (a) resistor (b) capacitor (c) fuse (d) buzzer
  19. 19.What does a resistor do? (a) senses how hot it is (b) is a resistance knob (c) makes a beeping sound (d) limits the current
  20. 20.True or false: a transistor boosts a small signal. (a) False (b) True
  21. 21.What does a thermistor do? (a) smooths a wobbly supply (b) beeps for an alarm (c) stores a little charge (d) senses how hot it is
  22. 22.What does a fuse do? (a) boosts a small signal (b) blows if current is high (c) turns a fan or wheels (d) stores a little charge
  23. 23.🧩 Which component has coloured bands? (a) transistor (b) resistor (c) potentiometer (d) diode
  24. 24.True or false: a resistor is a resistance knob. (a) False (b) True
  25. 25.True or false: a capacitor limits the current. (a) False (b) True
  26. 26.🧩 Which component senses how bright it is? (a) fuse (b) transistor (c) LDR (d) motor
  27. 27.True or false: a resistor has coloured bands. (a) True (b) False
  28. 28.True or false: a buzzer makes a beeping sound. (a) False (b) True
  29. 29.🧩 Which component senses how hot it is? (a) capacitor (b) resistor (c) thermistor (d) motor
  30. 30.True or false: a capacitor stores a little charge. (a) True (b) False
  31. 31.True or false: a fuse limits the current. (a) False (b) True
  32. 32.True or false: a resistor makes a beeping sound. (a) True (b) False
  33. 33.🧩 Which component stores a little charge? (a) LED (b) thermistor (c) resistor (d) capacitor
  34. 34.True or false: a capacitor beeps for an alarm. (a) True (b) False
  35. 35.🧩 Which component blows if current is high? (a) thermistor (b) LDR (c) fuse (d) capacitor
  36. 36.🧩 Which component is a resistance knob? (a) diode (b) capacitor (c) LDR (d) potentiometer
  37. 37.True or false: an LDR senses how bright it is. (a) False (b) True
  38. 38.True or false: a diode turns a fan or wheels. (a) False (b) True
  39. 39.🧩 Which component turns a fan or wheels? (a) resistor (b) transistor (c) motor (d) thermistor
  40. 40.True or false: an LDR lets current go one way. (a) True (b) False

Answer key

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

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