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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 392 · 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 buzzer limits the current. (a) False (b) True
  2. 2.🧩 Which part changes electrical energy into sound? (a) a buzzer (b) a capacitor (c) a diode (d) a resistor
  3. 3.🧩 Which component boosts a small signal? (a) buzzer (b) potentiometer (c) transistor (d) motor
  4. 4.What does a diode do? (a) has coloured bands (b) senses how bright it is (c) lets current go one way (d) beeps for an alarm
  5. 5.🧩 Which component limits the current? (a) resistor (b) transistor (c) buzzer (d) LED
  6. 6.True or false: an LED glows using little power. (a) False (b) True
  7. 7.True or false: a resistor has coloured bands. (a) True (b) False
  8. 8.True or false: a fuse beeps for an alarm. (a) False (b) True
  9. 9.What does a potentiometer do? (a) limits the current (b) senses how bright it is (c) stores a little charge (d) is a resistance knob
  10. 10.🧩 Which part changes electrical energy into movement? (a) a fuse (b) an LED (c) a motor (d) a resistor
  11. 11.True or false: a transistor makes a beeping sound. (a) False (b) True
  12. 12.🧩 Which component turns a fan or wheels? (a) motor (b) potentiometer (c) LED (d) diode
  13. 13.🧩 Which component beeps for an alarm? (a) transistor (b) capacitor (c) buzzer (d) resistor
  14. 14.🧩 A capacitor in a circuit can … (a) measure heat (b) make light (c) store charge briefly (d) spin a wheel
  15. 15.What does an LED do? (a) stores a little charge (b) senses how bright it is (c) has coloured bands (d) glows using little power
  16. 16.What does a resistor do? (a) makes a beeping sound (b) boosts a small signal (c) limits the current (d) stores a little charge
  17. 17.What does a buzzer do? (a) glows using little power (b) has coloured bands (c) makes a beeping sound (d) turns a fan or wheels
  18. 18.🧩 Which component is a resistance knob? (a) resistor (b) thermistor (c) buzzer (d) potentiometer
  19. 19.🧩 Which component lets current go one way? (a) motor (b) potentiometer (c) diode (d) LDR
  20. 20.🧩 Which component blows if current is high? (a) buzzer (b) diode (c) fuse (d) capacitor
  21. 21.True or false: an LED blows if current is high. (a) True (b) False
  22. 22.What does a fuse do? (a) senses how hot it is (b) senses how bright it is (c) blows if current is high (d) makes things spin
  23. 23.True or false: a capacitor smooths a wobbly supply. (a) True (b) False
  24. 24.What does an LDR do? (a) makes things spin (b) has coloured bands (c) stores a little charge (d) senses how bright it is
  25. 25.True or false: a resistor beeps for an alarm. (a) True (b) False
  26. 26.What does a capacitor do? (a) boosts a small signal (b) has coloured bands (c) stores a little charge (d) glows using little power
  27. 27.🧩 Which component smooths a wobbly supply? (a) thermistor (b) capacitor (c) LED (d) motor
  28. 28.🧩 Which component stores a little charge? (a) diode (b) transistor (c) capacitor (d) LED
  29. 29.True or false: a transistor boosts a small signal. (a) True (b) False
  30. 30.True or false: a capacitor stores a little charge. (a) True (b) False
  31. 31.True or false: an LED stores a little charge. (a) False (b) True
  32. 32.True or false: a potentiometer boosts a small signal. (a) True (b) False
  33. 33.True or false: an LDR senses how bright it is. (a) True (b) False
  34. 34.True or false: a buzzer senses how hot it is. (a) True (b) False
  35. 35.🧩 Which component senses how hot it is? (a) motor (b) resistor (c) LED (d) thermistor
  36. 36.True or false: a diode makes a beeping sound. (a) False (b) True
  37. 37.What does a capacitor do? (a) makes things spin (b) limits the current (c) is a resistance knob (d) smooths a wobbly supply
  38. 38.True or false: a motor makes things spin. (a) True (b) False
  39. 39.True or false: a buzzer beeps for an alarm. (a) True (b) False
  40. 40.What does a motor do? (a) boosts a small signal (b) makes things spin (c) limits the current (d) makes a beeping sound

Answer key

  1. False
  2. a buzzer
  3. transistor
  4. lets current go one way
  5. resistor
  6. True
  7. True
  8. False
  9. is a resistance knob
  10. a motor
  11. False
  12. motor
  13. buzzer
  14. store charge briefly
  15. glows using little power
  16. limits the current
  17. makes a beeping sound
  18. potentiometer
  19. diode
  20. fuse
  21. False
  22. blows if current is high
  23. True
  24. senses how bright it is
  25. False
  26. stores a little charge
  27. capacitor
  28. capacitor
  29. True
  30. True
  31. False
  32. False
  33. True
  34. False
  35. thermistor
  36. False
  37. smooths a wobbly supply
  38. True
  39. True
  40. makes things spin

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