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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 399 · 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 motor makes things spin. (a) False (b) True
  2. 2.🧩 Which component senses how bright it is? (a) buzzer (b) LED (c) capacitor (d) LDR
  3. 3.What does a buzzer do? (a) boosts a small signal (b) stores a little charge (c) makes a beeping sound (d) limits the current
  4. 4.True or false: a capacitor boosts a small signal. (a) True (b) False
  5. 5.What does an LDR do? (a) beeps for an alarm (b) senses how bright it is (c) makes a beeping sound (d) has coloured bands
  6. 6.True or false: a thermistor senses how hot it is. (a) True (b) False
  7. 7.🧩 Which part changes electrical energy into sound? (a) a buzzer (b) a capacitor (c) a resistor (d) a diode
  8. 8.🧩 A capacitor in a circuit can … (a) measure heat (b) make light (c) store charge briefly (d) spin a wheel
  9. 9.What does a diode do? (a) smooths a wobbly supply (b) blows if current is high (c) turns a fan or wheels (d) lets current go one way
  10. 10.True or false: a resistor makes a beeping sound. (a) False (b) True
  11. 11.🧩 Which component is a resistance knob? (a) motor (b) potentiometer (c) LED (d) buzzer
  12. 12.True or false: a motor blows if current is high. (a) True (b) False
  13. 13.True or false: a resistor has coloured bands. (a) True (b) False
  14. 14.🧩 Which component smooths a wobbly supply? (a) diode (b) capacitor (c) buzzer (d) fuse
  15. 15.🧩 Which part changes electrical energy into movement? (a) a motor (b) a resistor (c) an LED (d) a fuse
  16. 16.True or false: a resistor limits the current. (a) True (b) False
  17. 17.🧩 Which component lets current go one way? (a) diode (b) motor (c) resistor (d) thermistor
  18. 18.True or false: a buzzer limits the current. (a) False (b) True
  19. 19.True or false: a buzzer makes a beeping sound. (a) True (b) False
  20. 20.What does a transistor do? (a) has coloured bands (b) makes things spin (c) boosts a small signal (d) glows using little power
  21. 21.True or false: a potentiometer smooths a wobbly supply. (a) False (b) True
  22. 22.🧩 Which component turns a fan or wheels? (a) transistor (b) motor (c) LED (d) diode
  23. 23.What does a buzzer do? (a) boosts a small signal (b) limits the current (c) smooths a wobbly supply (d) beeps for an alarm
  24. 24.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
  25. 25.True or false: a fuse blows if current is high. (a) True (b) False
  26. 26.True or false: an LDR beeps for an alarm. (a) True (b) False
  27. 27.🧩 Which component makes things spin? (a) buzzer (b) motor (c) LED (d) capacitor
  28. 28.🧩 Which component boosts a small signal? (a) resistor (b) transistor (c) LED (d) capacitor
  29. 29.🧩 Which component has coloured bands? (a) diode (b) potentiometer (c) LDR (d) resistor
  30. 30.True or false: a thermistor makes things spin. (a) False (b) True
  31. 31.🧩 Which component stores a little charge? (a) diode (b) potentiometer (c) capacitor (d) fuse
  32. 32.What does a thermistor do? (a) blows if current is high (b) limits the current (c) makes things spin (d) senses how hot it is
  33. 33.🧩 Which component beeps for an alarm? (a) buzzer (b) LED (c) capacitor (d) LDR
  34. 34.What does a motor do? (a) is a resistance knob (b) turns a fan or wheels (c) glows using little power (d) stores a little charge
  35. 35.🧩 Which component makes a beeping sound? (a) LDR (b) diode (c) buzzer (d) transistor
  36. 36.True or false: a buzzer boosts a small signal. (a) True (b) False
  37. 37.True or false: a resistor senses how hot it is. (a) True (b) False
  38. 38.True or false: a resistor is a resistance knob. (a) True (b) False
  39. 39.What does a resistor do? (a) makes a beeping sound (b) turns a fan or wheels (c) beeps for an alarm (d) limits the current
  40. 40.What does an LED do? (a) makes a beeping sound (b) glows using little power (c) boosts a small signal (d) lets current go one way

Answer key

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

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