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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 445 · 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 potentiometer is a resistance knob. (a) False (b) True
  2. 2.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a buzzer (c) a diode (d) a resistor
  3. 3.True or false: a thermistor blows if current is high. (a) True (b) False
  4. 4.What does an LED do? (a) glows using little power (b) makes things spin (c) boosts a small signal (d) makes a beeping sound
  5. 5.🧩 Which component has coloured bands? (a) motor (b) fuse (c) buzzer (d) resistor
  6. 6.True or false: a resistor makes a beeping sound. (a) True (b) False
  7. 7.🧩 Which component boosts a small signal? (a) LDR (b) transistor (c) diode (d) capacitor
  8. 8.What does a resistor do? (a) turns a fan or wheels (b) is a resistance knob (c) lets current go one way (d) has coloured bands
  9. 9.True or false: a motor stores a little charge. (a) False (b) True
  10. 10.True or false: a buzzer senses how bright it is. (a) True (b) False
  11. 11.🧩 Which component is a resistance knob? (a) motor (b) resistor (c) potentiometer (d) buzzer
  12. 12.🧩 Which part changes electrical energy into movement? (a) a resistor (b) a motor (c) a fuse (d) an LED
  13. 13.What does a motor do? (a) beeps for an alarm (b) smooths a wobbly supply (c) has coloured bands (d) makes things spin
  14. 14.True or false: an LDR stores a little charge. (a) False (b) True
  15. 15.What does a motor do? (a) limits the current (b) blows if current is high (c) lets current go one way (d) turns a fan or wheels
  16. 16.What does a transistor do? (a) stores a little charge (b) has coloured bands (c) senses how hot it is (d) boosts a small signal
  17. 17.True or false: a capacitor stores a little charge. (a) False (b) True
  18. 18.🧩 Which component senses how hot it is? (a) capacitor (b) diode (c) buzzer (d) thermistor
  19. 19.True or false: a diode senses how hot it is. (a) False (b) True
  20. 20.What does a buzzer do? (a) is a resistance knob (b) senses how hot it is (c) makes a beeping sound (d) has coloured bands
  21. 21.True or false: a resistor blows if current is high. (a) False (b) True
  22. 22.What does an LDR do? (a) makes a beeping sound (b) beeps for an alarm (c) limits the current (d) senses how bright it is
  23. 23.What does a buzzer do? (a) beeps for an alarm (b) senses how bright it is (c) lets current go one way (d) has coloured bands
  24. 24.True or false: a diode lets current go one way. (a) True (b) False
  25. 25.True or false: an LED glows using little power. (a) False (b) True
  26. 26.🧩 A capacitor in a circuit can … (a) spin a wheel (b) measure heat (c) make light (d) store charge briefly
  27. 27.True or false: a fuse blows if current is high. (a) True (b) False
  28. 28.🧩 Which component limits the current? (a) resistor (b) LDR (c) LED (d) buzzer
  29. 29.🧩 Which component glows using little power? (a) potentiometer (b) buzzer (c) fuse (d) LED
  30. 30.True or false: a resistor limits the current. (a) False (b) True
  31. 31.🧩 Which component beeps for an alarm? (a) LED (b) buzzer (c) resistor (d) potentiometer
  32. 32.What does a capacitor do? (a) stores a little charge (b) is a resistance knob (c) senses how hot it is (d) has coloured bands
  33. 33.🧩 Which component senses how bright it is? (a) LED (b) LDR (c) potentiometer (d) fuse
  34. 34.True or false: a capacitor smooths a wobbly supply. (a) True (b) False
  35. 35.🧩 Which component lets current go one way? (a) fuse (b) diode (c) LED (d) LDR
  36. 36.What does a diode do? (a) limits the current (b) beeps for an alarm (c) lets current go one way (d) is a resistance knob
  37. 37.What does a thermistor do? (a) boosts a small signal (b) beeps for an alarm (c) senses how hot it is (d) makes things spin
  38. 38.🧩 Which component smooths a wobbly supply? (a) fuse (b) thermistor (c) buzzer (d) capacitor
  39. 39.🧩 Which component blows if current is high? (a) LDR (b) LED (c) motor (d) fuse
  40. 40.True or false: a transistor boosts a small signal. (a) False (b) True

Answer key

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

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