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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 264 · 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: a fuse smooths a wobbly supply. (a) True (b) False
  2. 2.True or false: a motor limits the current. (a) False (b) True
  3. 3.What does an LDR do? (a) senses how hot it is (b) senses how bright it is (c) beeps for an alarm (d) limits the current
  4. 4.What does a thermistor do? (a) smooths a wobbly supply (b) stores a little charge (c) senses how hot it is (d) is a resistance knob
  5. 5.What does a potentiometer do? (a) senses how bright it is (b) limits the current (c) is a resistance knob (d) glows using little power
  6. 6.🧩 Which component turns a fan or wheels? (a) buzzer (b) resistor (c) fuse (d) motor
  7. 7.True or false: a motor lets current go one way. (a) True (b) False
  8. 8.What does a motor do? (a) lets current go one way (b) turns a fan or wheels (c) is a resistance knob (d) limits the current
  9. 9.🧩 Which part changes electrical energy into movement? (a) a resistor (b) a motor (c) a fuse (d) an LED
  10. 10.🧩 Which component is a resistance knob? (a) LED (b) LDR (c) potentiometer (d) resistor
  11. 11.True or false: a motor makes a beeping sound. (a) False (b) True
  12. 12.True or false: a resistor senses how hot it is. (a) False (b) True
  13. 13.🧩 A capacitor in a circuit can … (a) make light (b) spin a wheel (c) measure heat (d) store charge briefly
  14. 14.🧩 Which component beeps for an alarm? (a) fuse (b) diode (c) buzzer (d) thermistor
  15. 15.🧩 Which part changes electrical energy into sound? (a) a buzzer (b) a diode (c) a resistor (d) a capacitor
  16. 16.🧩 Which component smooths a wobbly supply? (a) fuse (b) transistor (c) motor (d) capacitor
  17. 17.True or false: a capacitor has coloured bands. (a) True (b) False
  18. 18.True or false: a buzzer makes things spin. (a) False (b) True
  19. 19.True or false: a transistor makes things spin. (a) True (b) False
  20. 20.🧩 Which component lets current go one way? (a) fuse (b) LED (c) resistor (d) diode
  21. 21.🧩 Which component boosts a small signal? (a) transistor (b) thermistor (c) diode (d) fuse
  22. 22.What does a buzzer do? (a) is a resistance knob (b) beeps for an alarm (c) stores a little charge (d) senses how hot it is
  23. 23.True or false: a transistor boosts a small signal. (a) False (b) True
  24. 24.What does an LED do? (a) turns a fan or wheels (b) glows using little power (c) lets current go one way (d) senses how bright it is
  25. 25.True or false: an LDR turns a fan or wheels. (a) True (b) False
  26. 26.🧩 Which component glows using little power? (a) transistor (b) LDR (c) buzzer (d) LED
  27. 27.What does a transistor do? (a) smooths a wobbly supply (b) senses how bright it is (c) boosts a small signal (d) turns a fan or wheels
  28. 28.True or false: a buzzer stores a little charge. (a) True (b) False
  29. 29.True or false: an LDR smooths a wobbly supply. (a) True (b) False
  30. 30.What does a motor do? (a) makes things spin (b) limits the current (c) blows if current is high (d) smooths a wobbly supply
  31. 31.What does a diode do? (a) beeps for an alarm (b) lets current go one way (c) makes things spin (d) senses how bright it is
  32. 32.What does a resistor do? (a) is a resistance knob (b) lets current go one way (c) has coloured bands (d) senses how bright it is
  33. 33.What does a capacitor do? (a) senses how hot it is (b) glows using little power (c) limits the current (d) stores a little charge
  34. 34.True or false: a potentiometer stores a little charge. (a) False (b) True
  35. 35.True or false: a fuse blows if current is high. (a) True (b) False
  36. 36.🧩 Which component stores a little charge? (a) LED (b) capacitor (c) transistor (d) buzzer
  37. 37.True or false: a capacitor stores a little charge. (a) True (b) False
  38. 38.🧩 Which component limits the current? (a) transistor (b) motor (c) resistor (d) LED
  39. 39.🧩 Which component has coloured bands? (a) transistor (b) potentiometer (c) buzzer (d) resistor
  40. 40.True or false: an LDR boosts a small signal. (a) True (b) False

Answer key

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

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