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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 313 · 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) spin a wheel (b) store charge briefly (c) measure heat (d) make light
  2. 2.What does a fuse do? (a) stores a little charge (b) beeps for an alarm (c) blows if current is high (d) has coloured bands
  3. 3.True or false: a capacitor stores a little charge. (a) False (b) True
  4. 4.What does a diode do? (a) turns a fan or wheels (b) lets current go one way (c) blows if current is high (d) boosts a small signal
  5. 5.What does a capacitor do? (a) limits the current (b) senses how bright it is (c) stores a little charge (d) makes a beeping sound
  6. 6.What does a resistor do? (a) senses how hot it is (b) makes a beeping sound (c) limits the current (d) lets current go one way
  7. 7.True or false: a buzzer stores a little charge. (a) False (b) True
  8. 8.True or false: a buzzer limits the current. (a) False (b) True
  9. 9.What does a buzzer do? (a) senses how bright it is (b) stores a little charge (c) beeps for an alarm (d) smooths a wobbly supply
  10. 10.What does a capacitor do? (a) lets current go one way (b) smooths a wobbly supply (c) is a resistance knob (d) makes things spin
  11. 11.True or false: a buzzer is a resistance knob. (a) False (b) True
  12. 12.True or false: a resistor glows using little power. (a) True (b) False
  13. 13.True or false: a motor stores a little charge. (a) False (b) True
  14. 14.🧩 Which component beeps for an alarm? (a) resistor (b) capacitor (c) motor (d) buzzer
  15. 15.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a resistor (c) a diode (d) a buzzer
  16. 16.What does a buzzer do? (a) senses how bright it is (b) turns a fan or wheels (c) makes a beeping sound (d) stores a little charge
  17. 17.🧩 Which component limits the current? (a) resistor (b) motor (c) transistor (d) thermistor
  18. 18.🧩 Which component makes a beeping sound? (a) transistor (b) capacitor (c) buzzer (d) fuse
  19. 19.🧩 Which component glows using little power? (a) fuse (b) resistor (c) LED (d) capacitor
  20. 20.🧩 Which component lets current go one way? (a) fuse (b) buzzer (c) thermistor (d) diode
  21. 21.True or false: a resistor turns a fan or wheels. (a) True (b) False
  22. 22.🧩 Which component senses how bright it is? (a) thermistor (b) buzzer (c) transistor (d) LDR
  23. 23.What does a transistor do? (a) is a resistance knob (b) stores a little charge (c) blows if current is high (d) boosts a small signal
  24. 24.True or false: a resistor lets current go one way. (a) False (b) True
  25. 25.What does a potentiometer do? (a) is a resistance knob (b) senses how bright it is (c) has coloured bands (d) turns a fan or wheels
  26. 26.🧩 Which component senses how hot it is? (a) potentiometer (b) LED (c) LDR (d) thermistor
  27. 27.🧩 Which component is a resistance knob? (a) capacitor (b) LDR (c) thermistor (d) potentiometer
  28. 28.🧩 Which component has coloured bands? (a) diode (b) resistor (c) capacitor (d) potentiometer
  29. 29.True or false: a resistor has coloured bands. (a) True (b) False
  30. 30.🧩 Which part changes electrical energy into movement? (a) an LED (b) a fuse (c) a resistor (d) a motor
  31. 31.🧩 Which component makes things spin? (a) thermistor (b) motor (c) LED (d) diode
  32. 32.True or false: an LDR senses how bright it is. (a) False (b) True
  33. 33.True or false: a motor turns a fan or wheels. (a) False (b) True
  34. 34.True or false: a capacitor makes things spin. (a) False (b) True
  35. 35.True or false: a motor makes things spin. (a) True (b) False
  36. 36.🧩 Which component stores a little charge? (a) diode (b) capacitor (c) fuse (d) buzzer
  37. 37.What does an LED do? (a) makes a beeping sound (b) is a resistance knob (c) glows using little power (d) senses how bright it is
  38. 38.True or false: a potentiometer glows using little power. (a) False (b) True
  39. 39.🧩 Which component boosts a small signal? (a) thermistor (b) capacitor (c) transistor (d) motor
  40. 40.True or false: a thermistor has coloured bands. (a) False (b) True

Answer key

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

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