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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 187 · 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.True or false: an LED senses how bright it is. (a) True (b) False
  2. 2.🧩 Which component boosts a small signal? (a) capacitor (b) transistor (c) resistor (d) motor
  3. 3.🧩 Which component beeps for an alarm? (a) resistor (b) LDR (c) buzzer (d) motor
  4. 4.True or false: an LED has coloured bands. (a) False (b) True
  5. 5.🧩 Which part changes electrical energy into sound? (a) a diode (b) a capacitor (c) a buzzer (d) a resistor
  6. 6.What does a transistor do? (a) turns a fan or wheels (b) senses how hot it is (c) is a resistance knob (d) boosts a small signal
  7. 7.🧩 A capacitor in a circuit can … (a) spin a wheel (b) measure heat (c) make light (d) store charge briefly
  8. 8.🧩 Which component makes things spin? (a) capacitor (b) motor (c) resistor (d) LED
  9. 9.🧩 Which component glows using little power? (a) fuse (b) potentiometer (c) transistor (d) LED
  10. 10.What does a buzzer do? (a) makes a beeping sound (b) turns a fan or wheels (c) smooths a wobbly supply (d) limits the current
  11. 11.🧩 Which component smooths a wobbly supply? (a) motor (b) LDR (c) potentiometer (d) capacitor
  12. 12.True or false: a buzzer smooths a wobbly supply. (a) False (b) True
  13. 13.What does a buzzer do? (a) beeps for an alarm (b) makes things spin (c) lets current go one way (d) turns a fan or wheels
  14. 14.What does a motor do? (a) glows using little power (b) has coloured bands (c) limits the current (d) turns a fan or wheels
  15. 15.🧩 Which part changes electrical energy into movement? (a) a resistor (b) an LED (c) a fuse (d) a motor
  16. 16.True or false: a transistor boosts a small signal. (a) False (b) True
  17. 17.True or false: a motor makes things spin. (a) False (b) True
  18. 18.What does a diode do? (a) lets current go one way (b) senses how bright it is (c) has coloured bands (d) senses how hot it is
  19. 19.True or false: an LDR senses how bright it is. (a) False (b) True
  20. 20.What does a capacitor do? (a) boosts a small signal (b) makes things spin (c) blows if current is high (d) stores a little charge
  21. 21.True or false: an LDR is a resistance knob. (a) False (b) True
  22. 22.True or false: a resistor glows using little power. (a) True (b) False
  23. 23.🧩 Which component makes a beeping sound? (a) motor (b) potentiometer (c) buzzer (d) diode
  24. 24.True or false: a transistor stores a little charge. (a) False (b) True
  25. 25.🧩 Which component senses how hot it is? (a) transistor (b) thermistor (c) motor (d) buzzer
  26. 26.True or false: a fuse makes a beeping sound. (a) True (b) False
  27. 27.🧩 Which component is a resistance knob? (a) fuse (b) LED (c) potentiometer (d) capacitor
  28. 28.🧩 Which component stores a little charge? (a) potentiometer (b) thermistor (c) transistor (d) capacitor
  29. 29.What does an LED do? (a) makes things spin (b) senses how hot it is (c) glows using little power (d) senses how bright it is
  30. 30.🧩 Which component has coloured bands? (a) motor (b) resistor (c) capacitor (d) LDR
  31. 31.🧩 Which component turns a fan or wheels? (a) motor (b) resistor (c) thermistor (d) capacitor
  32. 32.True or false: a resistor has coloured bands. (a) False (b) True
  33. 33.True or false: a potentiometer is a resistance knob. (a) False (b) True
  34. 34.True or false: a motor makes a beeping sound. (a) True (b) False
  35. 35.What does a motor do? (a) limits the current (b) senses how hot it is (c) makes things spin (d) beeps for an alarm
  36. 36.True or false: a resistor limits the current. (a) True (b) False
  37. 37.True or false: a capacitor stores a little charge. (a) False (b) True
  38. 38.What does an LDR do? (a) lets current go one way (b) senses how bright it is (c) boosts a small signal (d) glows using little power
  39. 39.True or false: a thermistor turns a fan or wheels. (a) True (b) False
  40. 40.True or false: a resistor smooths a wobbly supply. (a) True (b) False

Answer key

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

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