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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 453 · 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 stores a little charge. (a) False (b) True
  2. 2.🧩 Which component senses how hot it is? (a) LED (b) thermistor (c) resistor (d) buzzer
  3. 3.🧩 Which part changes electrical energy into movement? (a) an LED (b) a resistor (c) a fuse (d) a motor
  4. 4.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a diode (c) a resistor (d) a buzzer
  5. 5.What does a thermistor do? (a) senses how hot it is (b) smooths a wobbly supply (c) blows if current is high (d) has coloured bands
  6. 6.🧩 Which component limits the current? (a) thermistor (b) resistor (c) capacitor (d) diode
  7. 7.🧩 Which component beeps for an alarm? (a) transistor (b) resistor (c) buzzer (d) thermistor
  8. 8.What does a buzzer do? (a) limits the current (b) blows if current is high (c) beeps for an alarm (d) boosts a small signal
  9. 9.True or false: an LDR stores a little charge. (a) False (b) True
  10. 10.True or false: a motor beeps for an alarm. (a) False (b) True
  11. 11.🧩 Which component makes a beeping sound? (a) LED (b) buzzer (c) motor (d) diode
  12. 12.What does an LED do? (a) makes things spin (b) senses how bright it is (c) lets current go one way (d) glows using little power
  13. 13.True or false: a buzzer makes a beeping sound. (a) True (b) False
  14. 14.True or false: a resistor has coloured bands. (a) False (b) True
  15. 15.🧩 Which component has coloured bands? (a) capacitor (b) resistor (c) fuse (d) motor
  16. 16.True or false: a thermistor makes a beeping sound. (a) False (b) True
  17. 17.🧩 Which component smooths a wobbly supply? (a) fuse (b) capacitor (c) resistor (d) LDR
  18. 18.🧩 Which component senses how bright it is? (a) buzzer (b) motor (c) LDR (d) fuse
  19. 19.What does a capacitor do? (a) glows using little power (b) stores a little charge (c) boosts a small signal (d) makes a beeping sound
  20. 20.What does an LDR do? (a) is a resistance knob (b) lets current go one way (c) senses how bright it is (d) beeps for an alarm
  21. 21.🧩 A capacitor in a circuit can … (a) measure heat (b) spin a wheel (c) store charge briefly (d) make light
  22. 22.🧩 Which component lets current go one way? (a) capacitor (b) LED (c) diode (d) fuse
  23. 23.What does a capacitor do? (a) is a resistance knob (b) smooths a wobbly supply (c) lets current go one way (d) boosts a small signal
  24. 24.What does a transistor do? (a) senses how bright it is (b) limits the current (c) boosts a small signal (d) smooths a wobbly supply
  25. 25.🧩 Which component boosts a small signal? (a) capacitor (b) buzzer (c) diode (d) transistor
  26. 26.What does a diode do? (a) senses how hot it is (b) beeps for an alarm (c) limits the current (d) lets current go one way
  27. 27.True or false: a fuse lets current go one way. (a) False (b) True
  28. 28.True or false: a diode smooths a wobbly supply. (a) True (b) False
  29. 29.What does a fuse do? (a) limits the current (b) stores a little charge (c) lets current go one way (d) blows if current is high
  30. 30.🧩 Which component blows if current is high? (a) buzzer (b) resistor (c) diode (d) fuse
  31. 31.True or false: a motor turns a fan or wheels. (a) False (b) True
  32. 32.True or false: an LED boosts a small signal. (a) False (b) True
  33. 33.True or false: an LDR beeps for an alarm. (a) True (b) False
  34. 34.🧩 Which component glows using little power? (a) buzzer (b) resistor (c) diode (d) LED
  35. 35.🧩 Which component is a resistance knob? (a) thermistor (b) LDR (c) motor (d) potentiometer
  36. 36.🧩 Which component makes things spin? (a) transistor (b) buzzer (c) thermistor (d) motor
  37. 37.What does a potentiometer do? (a) blows if current is high (b) makes things spin (c) is a resistance knob (d) smooths a wobbly supply
  38. 38.What does a resistor do? (a) is a resistance knob (b) makes a beeping sound (c) smooths a wobbly supply (d) limits the current
  39. 39.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
  40. 40.True or false: an LED stores a little charge. (a) False (b) True

Answer key

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

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