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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 339 · 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.What does a capacitor do? (a) makes things spin (b) lets current go one way (c) has coloured bands (d) stores a little charge
  2. 2.🧩 Which part changes electrical energy into sound? (a) a buzzer (b) a diode (c) a resistor (d) a capacitor
  3. 3.What does a resistor do? (a) senses how hot it is (b) has coloured bands (c) lets current go one way (d) turns a fan or wheels
  4. 4.True or false: a capacitor smooths a wobbly supply. (a) True (b) False
  5. 5.What does a fuse do? (a) blows if current is high (b) glows using little power (c) senses how hot it is (d) senses how bright it is
  6. 6.🧩 Which component beeps for an alarm? (a) resistor (b) buzzer (c) potentiometer (d) diode
  7. 7.What does a thermistor do? (a) senses how bright it is (b) blows if current is high (c) senses how hot it is (d) lets current go one way
  8. 8.True or false: a potentiometer senses how bright it is. (a) False (b) True
  9. 9.True or false: a fuse blows if current is high. (a) True (b) False
  10. 10.🧩 A capacitor in a circuit can … (a) spin a wheel (b) measure heat (c) store charge briefly (d) make light
  11. 11.🧩 Which part changes electrical energy into movement? (a) a fuse (b) a resistor (c) an LED (d) a motor
  12. 12.What does a diode do? (a) makes things spin (b) limits the current (c) senses how bright it is (d) lets current go one way
  13. 13.What does a transistor do? (a) makes a beeping sound (b) stores a little charge (c) turns a fan or wheels (d) boosts a small signal
  14. 14.🧩 Which component lets current go one way? (a) buzzer (b) fuse (c) diode (d) transistor
  15. 15.🧩 Which component makes a beeping sound? (a) motor (b) buzzer (c) LDR (d) diode
  16. 16.🧩 Which component senses how bright it is? (a) transistor (b) LDR (c) motor (d) thermistor
  17. 17.What does an LED do? (a) lets current go one way (b) has coloured bands (c) glows using little power (d) smooths a wobbly supply
  18. 18.True or false: a potentiometer beeps for an alarm. (a) False (b) True
  19. 19.🧩 Which component stores a little charge? (a) capacitor (b) resistor (c) thermistor (d) diode
  20. 20.🧩 Which component has coloured bands? (a) potentiometer (b) buzzer (c) resistor (d) fuse
  21. 21.What does a buzzer do? (a) glows using little power (b) makes a beeping sound (c) makes things spin (d) is a resistance knob
  22. 22.What does a motor do? (a) senses how bright it is (b) makes things spin (c) glows using little power (d) beeps for an alarm
  23. 23.What does a motor do? (a) stores a little charge (b) limits the current (c) senses how hot it is (d) turns a fan or wheels
  24. 24.🧩 Which component limits the current? (a) capacitor (b) resistor (c) transistor (d) motor
  25. 25.True or false: a diode lets current go one way. (a) False (b) True
  26. 26.🧩 Which component senses how hot it is? (a) motor (b) resistor (c) transistor (d) thermistor
  27. 27.True or false: a resistor lets current go one way. (a) True (b) False
  28. 28.True or false: a motor senses how bright it is. (a) True (b) False
  29. 29.🧩 Which component makes things spin? (a) resistor (b) motor (c) thermistor (d) potentiometer
  30. 30.True or false: a capacitor stores a little charge. (a) False (b) True
  31. 31.🧩 Which component blows if current is high? (a) buzzer (b) transistor (c) fuse (d) capacitor
  32. 32.What does an LDR do? (a) makes a beeping sound (b) limits the current (c) glows using little power (d) senses how bright it is
  33. 33.🧩 Which component is a resistance knob? (a) resistor (b) potentiometer (c) transistor (d) fuse
  34. 34.🧩 Which component smooths a wobbly supply? (a) buzzer (b) motor (c) transistor (d) capacitor
  35. 35.True or false: a potentiometer boosts a small signal. (a) True (b) False
  36. 36.True or false: a buzzer makes a beeping sound. (a) False (b) True
  37. 37.True or false: a transistor makes things spin. (a) False (b) True
  38. 38.🧩 Which component turns a fan or wheels? (a) capacitor (b) fuse (c) buzzer (d) motor
  39. 39.True or false: a fuse limits the current. (a) True (b) False
  40. 40.True or false: a thermistor lets current go one way. (a) False (b) True

Answer key

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

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