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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 697 · 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.🧩 A capacitor in a circuit can … (a) store charge briefly (b) measure heat (c) make light (d) spin a wheel
  2. 2.🧩 Which component is a resistance knob? (a) thermistor (b) potentiometer (c) diode (d) resistor
  3. 3.🧩 Which part changes electrical energy into sound? (a) a buzzer (b) a capacitor (c) a resistor (d) a diode
  4. 4.What does a resistor do? (a) smooths a wobbly supply (b) senses how bright it is (c) has coloured bands (d) makes a beeping sound
  5. 5.🧩 Which part changes electrical energy into movement? (a) an LED (b) a motor (c) a resistor (d) a fuse
  6. 6.🧩 Which component senses how hot it is? (a) transistor (b) LDR (c) diode (d) thermistor
  7. 7.True or false: an LDR senses how hot it is. (a) False (b) True
  8. 8.What does a resistor do? (a) stores a little charge (b) boosts a small signal (c) limits the current (d) beeps for an alarm
  9. 9.🧩 Which component limits the current? (a) capacitor (b) buzzer (c) resistor (d) motor
  10. 10.True or false: a capacitor stores a little charge. (a) True (b) False
  11. 11.True or false: a buzzer makes a beeping sound. (a) True (b) False
  12. 12.True or false: an LED boosts a small signal. (a) True (b) False
  13. 13.What does a buzzer do? (a) senses how bright it is (b) lets current go one way (c) makes a beeping sound (d) stores a little charge
  14. 14.True or false: a capacitor makes a beeping sound. (a) False (b) True
  15. 15.True or false: an LDR lets current go one way. (a) True (b) False
  16. 16.What does a capacitor do? (a) is a resistance knob (b) makes a beeping sound (c) turns a fan or wheels (d) smooths a wobbly supply
  17. 17.🧩 Which component senses how bright it is? (a) LDR (b) buzzer (c) capacitor (d) thermistor
  18. 18.True or false: a diode lets current go one way. (a) True (b) False
  19. 19.🧩 Which component glows using little power? (a) resistor (b) capacitor (c) buzzer (d) LED
  20. 20.🧩 Which component lets current go one way? (a) buzzer (b) diode (c) capacitor (d) LDR
  21. 21.True or false: an LED glows using little power. (a) True (b) False
  22. 22.What does an LDR do? (a) senses how bright it is (b) has coloured bands (c) makes a beeping sound (d) limits the current
  23. 23.What does a diode do? (a) lets current go one way (b) senses how bright it is (c) makes things spin (d) is a resistance knob
  24. 24.True or false: an LED limits the current. (a) True (b) False
  25. 25.What does a capacitor do? (a) boosts a small signal (b) limits the current (c) stores a little charge (d) blows if current is high
  26. 26.True or false: a resistor lets current go one way. (a) True (b) False
  27. 27.True or false: an LDR has coloured bands. (a) True (b) False
  28. 28.True or false: a capacitor smooths a wobbly supply. (a) True (b) False
  29. 29.🧩 Which component smooths a wobbly supply? (a) LED (b) LDR (c) buzzer (d) capacitor
  30. 30.🧩 Which component has coloured bands? (a) motor (b) transistor (c) LED (d) resistor
  31. 31.What does a transistor do? (a) smooths a wobbly supply (b) lets current go one way (c) senses how hot it is (d) boosts a small signal
  32. 32.True or false: a fuse is a resistance knob. (a) True (b) False
  33. 33.True or false: a motor makes things spin. (a) False (b) True
  34. 34.True or false: a motor makes a beeping sound. (a) False (b) True
  35. 35.True or false: a capacitor turns a fan or wheels. (a) False (b) True
  36. 36.🧩 Which component stores a little charge? (a) capacitor (b) potentiometer (c) buzzer (d) thermistor
  37. 37.🧩 Which component makes a beeping sound? (a) potentiometer (b) motor (c) buzzer (d) transistor
  38. 38.True or false: a buzzer turns a fan or wheels. (a) False (b) True
  39. 39.🧩 Which component beeps for an alarm? (a) motor (b) resistor (c) buzzer (d) transistor
  40. 40.True or false: a transistor stores a little charge. (a) True (b) False

Answer key

  1. store charge briefly
  2. potentiometer
  3. a buzzer
  4. has coloured bands
  5. a motor
  6. thermistor
  7. False
  8. limits the current
  9. resistor
  10. True
  11. True
  12. False
  13. makes a beeping sound
  14. False
  15. False
  16. smooths a wobbly supply
  17. LDR
  18. True
  19. LED
  20. diode
  21. True
  22. senses how bright it is
  23. lets current go one way
  24. False
  25. stores a little charge
  26. False
  27. False
  28. True
  29. capacitor
  30. resistor
  31. boosts a small signal
  32. False
  33. True
  34. False
  35. False
  36. capacitor
  37. buzzer
  38. False
  39. buzzer
  40. False

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