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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 254 · 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 glows using little power? (a) motor (b) buzzer (c) capacitor (d) LED
  2. 2.What does an LDR do? (a) blows if current is high (b) is a resistance knob (c) senses how bright it is (d) glows using little power
  3. 3.What does a resistor do? (a) beeps for an alarm (b) senses how hot it is (c) senses how bright it is (d) limits the current
  4. 4.🧩 Which component is a resistance knob? (a) transistor (b) resistor (c) diode (d) potentiometer
  5. 5.🧩 Which component stores a little charge? (a) transistor (b) LED (c) buzzer (d) capacitor
  6. 6.True or false: a resistor is a resistance knob. (a) True (b) False
  7. 7.🧩 A capacitor in a circuit can … (a) measure heat (b) make light (c) spin a wheel (d) store charge briefly
  8. 8.True or false: a diode senses how hot it is. (a) False (b) True
  9. 9.🧩 Which component smooths a wobbly supply? (a) fuse (b) transistor (c) potentiometer (d) capacitor
  10. 10.🧩 Which part changes electrical energy into movement? (a) a resistor (b) a motor (c) an LED (d) a fuse
  11. 11.True or false: a resistor lets current go one way. (a) False (b) True
  12. 12.True or false: a buzzer beeps for an alarm. (a) True (b) False
  13. 13.🧩 Which component lets current go one way? (a) resistor (b) diode (c) capacitor (d) fuse
  14. 14.🧩 Which component makes a beeping sound? (a) buzzer (b) diode (c) potentiometer (d) LED
  15. 15.🧩 Which component boosts a small signal? (a) capacitor (b) resistor (c) thermistor (d) transistor
  16. 16.🧩 Which component makes things spin? (a) motor (b) capacitor (c) fuse (d) resistor
  17. 17.What does a transistor do? (a) senses how bright it is (b) is a resistance knob (c) turns a fan or wheels (d) boosts a small signal
  18. 18.True or false: a resistor blows if current is high. (a) True (b) False
  19. 19.What does an LED do? (a) glows using little power (b) lets current go one way (c) turns a fan or wheels (d) beeps for an alarm
  20. 20.What does a motor do? (a) beeps for an alarm (b) smooths a wobbly supply (c) boosts a small signal (d) turns a fan or wheels
  21. 21.🧩 Which component beeps for an alarm? (a) thermistor (b) diode (c) resistor (d) buzzer
  22. 22.True or false: an LED boosts a small signal. (a) True (b) False
  23. 23.True or false: a fuse has coloured bands. (a) False (b) True
  24. 24.What does a capacitor do? (a) glows using little power (b) smooths a wobbly supply (c) boosts a small signal (d) limits the current
  25. 25.True or false: a buzzer turns a fan or wheels. (a) False (b) True
  26. 26.🧩 Which component senses how bright it is? (a) motor (b) LDR (c) LED (d) capacitor
  27. 27.🧩 Which component has coloured bands? (a) resistor (b) fuse (c) LED (d) capacitor
  28. 28.True or false: a capacitor makes things spin. (a) True (b) False
  29. 29.🧩 Which component limits the current? (a) thermistor (b) diode (c) resistor (d) transistor
  30. 30.What does a diode do? (a) boosts a small signal (b) has coloured bands (c) lets current go one way (d) limits the current
  31. 31.What does a thermistor do? (a) makes a beeping sound (b) glows using little power (c) senses how hot it is (d) stores a little charge
  32. 32.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a buzzer (c) a diode (d) a capacitor
  33. 33.🧩 Which component turns a fan or wheels? (a) thermistor (b) capacitor (c) LED (d) motor
  34. 34.True or false: a transistor boosts a small signal. (a) False (b) True
  35. 35.True or false: a resistor has coloured bands. (a) False (b) True
  36. 36.True or false: a capacitor stores a little charge. (a) True (b) False
  37. 37.True or false: a fuse senses how bright it is. (a) True (b) False
  38. 38.True or false: a potentiometer stores a little charge. (a) True (b) False
  39. 39.What does a potentiometer do? (a) smooths a wobbly supply (b) is a resistance knob (c) beeps for an alarm (d) lets current go one way
  40. 40.True or false: a diode lets current go one way. (a) False (b) True

Answer key

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

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